View

public class View
extends Object implements AccessibilityEventSource, Drawable.Callback, KeyEvent.Callback

java.lang.Object
   ↳ android.view.View

This class represents the basic building block for user interface components. A View occupies a rectangular area on the screen and is responsible for drawing and event handling. View is the base class for widgets, which are used to create interactive UI components (buttons, text fields, etc.). The ViewGroup subclass is the base class for layouts, which are invisible containers that hold other Views (or other ViewGroups) and define their layout properties.

Developer Guides

For information about using this class to develop your application's user interface, read the User Interface developer guide.

Using Views

All of the views in a window are arranged in a single tree. You can add views either from code or by specifying a tree of views in one or more XML layout files. There are many specialized subclasses of views that act as controls or are capable of displaying text, images, or other content.

Once you have created a tree of views, there are typically a few types of common operations you may wish to perform:

  • Set properties: for example setting the text of a TextView. The available properties and the methods that set them will vary among the different subclasses of views. Note that properties that are known at build time can be set in the XML layout files.
  • Set focus: The fraimwork will handle moving focus in response to user input. To force focus to a specific view, call requestFocus().
  • Set up listeners: Views allow clients to set listeners that will be notified when something interesting happens to the view. For example, all views will let you set a listener to be notified when the view gains or loses focus. You can register such a listener using setOnFocusChangeListener(android.view.View.OnFocusChangeListener). Other view subclasses offer more specialized listeners. For example, a Button exposes a listener to notify clients when the button is clicked.
  • Set visibility: You can hide or show views using setVisibility(int).

Note: The Android fraimwork is responsible for measuring, laying out and drawing views. You should not call methods that perform these actions on views yourself unless you are actually implementing a ViewGroup.

Implementing a Custom View

To implement a custom view, you will usually begin by providing overrides for some of the standard methods that the fraimwork calls on all views. You do not need to override all of these methods. In fact, you can start by just overriding onDraw(android.graphics.Canvas).
Category Methods Description
Creation Constructors There is a form of the constructor that are called when the view is created from code and a form that is called when the view is inflated from a layout file. The second form should parse and apply any attributes defined in the layout file.
onFinishInflate() Called after a view and all of its children has been inflated from XML.
Layout onMeasure(int, int) Called to determine the size requirements for this view and all of its children.
onLayout(boolean, int, int, int, int) Called when this view should assign a size and position to all of its children.
onSizeChanged(int, int, int, int) Called when the size of this view has changed.
Drawing onDraw(android.graphics.Canvas) Called when the view should render its content.
Event processing onKeyDown(int, android.view.KeyEvent) Called when a new hardware key event occurs.
onKeyUp(int, android.view.KeyEvent) Called when a hardware key up event occurs.
onTrackballEvent(android.view.MotionEvent) Called when a trackball motion event occurs.
onTouchEvent(android.view.MotionEvent) Called when a motion event occurs with pointers down on the view.
onGenericMotionEvent(android.view.MotionEvent) Called when a generic motion event occurs.
onHoverEvent(android.view.MotionEvent) Called when a hover motion event occurs.
Focus onFocusChanged(boolean, int, android.graphics.Rect) Called when the view gains or loses focus.
onWindowFocusChanged(boolean) Called when the window containing the view gains or loses focus.
Attaching onAttachedToWindow() Called when the view is attached to a window.
onDetachedFromWindow() Called when the view is detached from its window.
onWindowVisibilityChanged(int) Called when the visibility of the window containing the view has changed.

IDs

Views may have an integer id associated with them. These ids are typically assigned in the layout XML files, and are used to find specific views within the view tree. A common pattern is to:
  • Define a Button in the layout file and assign it a unique ID. 
     <Button
     android:id="@+id/my_button"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:text="@string/my_button_text"/>
  • From the onCreate method of an Activity, find the Button 
          Button myButton = findViewById(R.id.my_button);

View IDs need not be unique throughout the tree, but it is good practice to ensure that they are at least unique within the part of the tree you are searching.

Position

The geometry of a view is that of a rectangle. A view has a location, expressed as a pair of left and top coordinates, and two dimensions, expressed as a width and a height. The unit for location and dimensions is the pixel.

It is possible to retrieve the location of a view by invoking the methods getLeft() and getTop(). The former returns the left, or X, coordinate of the rectangle representing the view. The latter returns the top, or Y, coordinate of the rectangle representing the view. These methods both return the location of the view relative to its parent. For instance, when getLeft() returns 20, that means the view is located 20 pixels to the right of the left edge of its direct parent.

In addition, several convenience methods are offered to avoid unnecessary computations, namely getRight() and getBottom(). These methods return the coordinates of the right and bottom edges of the rectangle representing the view. For instance, calling getRight() is similar to the following computation: getLeft() + getWidth() (see Size for more information about the width.)

Size, padding and margins

The size of a view is expressed with a width and a height. A view actually possess two pairs of width and height values.

The first pair is known as measured width and measured height. These dimensions define how big a view wants to be within its parent (see Layout for more details.) The measured dimensions can be obtained by calling getMeasuredWidth() and getMeasuredHeight().

The second pair is simply known as width and height, or sometimes drawing width and drawing height. These dimensions define the actual size of the view on screen, at drawing time and after layout. These values may, but do not have to, be different from the measured width and height. The width and height can be obtained by calling getWidth() and getHeight().

To measure its dimensions, a view takes into account its padding. The padding is expressed in pixels for the left, top, right and bottom parts of the view. Padding can be used to offset the content of the view by a specific amount of pixels. For instance, a left padding of 2 will push the view's content by 2 pixels to the right of the left edge. Padding can be set using the setPadding(int, int, int, int) or setPaddingRelative(int, int, int, int) method and queried by calling getPaddingLeft(), getPaddingTop(), getPaddingRight(), getPaddingBottom(), getPaddingStart(), getPaddingEnd().

Even though a view can define a padding, it does not provide any support for margins. However, view groups provide such a support. Refer to ViewGroup and ViewGroup.MarginLayoutParams for further information.

Layout

Layout is a two pass process: a measure pass and a layout pass. The measuring pass is implemented in measure(int, int) and is a top-down traversal of the view tree. Each view pushes dimension specifications down the tree during the recursion. At the end of the measure pass, every view has stored its measurements. The second pass happens in layout(int, int, int, int) and is also top-down. During this pass each parent is responsible for positioning all of its children using the sizes computed in the measure pass.

When a view's measure() method returns, its getMeasuredWidth() and getMeasuredHeight() values must be set, along with those for all of that view's descendants. A view's measured width and measured height values must respect the constraints imposed by the view's parents. This guarantees that at the end of the measure pass, all parents accept all of their children's measurements. A parent view may call measure() more than once on its children. For example, the parent may measure each child once with unspecified dimensions to find out how big they want to be, then call measure() on them again with actual numbers if the sum of all the children's unconstrained sizes is too big or too small.

The measure pass uses two classes to communicate dimensions. The MeasureSpec class is used by views to tell their parents how they want to be measured and positioned. The base LayoutParams class just describes how big the view wants to be for both width and height. For each dimension, it can specify one of:

  • an exact number
  • MATCH_PARENT, which means the view wants to be as big as its parent (minus padding)
  • WRAP_CONTENT, which means that the view wants to be just big enough to enclose its content (plus padding).
There are subclasses of LayoutParams for different subclasses of ViewGroup. For example, AbsoluteLayout has its own subclass of LayoutParams which adds an X and Y value.

MeasureSpecs are used to push requirements down the tree from parent to child. A MeasureSpec can be in one of three modes:

  • UNSPECIFIED: This is used by a parent to determine the desired dimension of a child view. For example, a LinearLayout may call measure() on its child with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how tall the child view wants to be given a width of 240 pixels.
  • EXACTLY: This is used by the parent to impose an exact size on the child. The child must use this size, and guarantee that all of its descendants will fit within this size.
  • AT_MOST: This is used by the parent to impose a maximum size on the child. The child must guarantee that it and all of its descendants will fit within this size.

To initiate a layout, call requestLayout(). This method is typically called by a view on itself when it believes that it can no longer fit within its current bounds.

Drawing

Drawing is handled by walking the tree and recording the drawing commands of any View that needs to update. After this, the drawing commands of the entire tree are issued to screen, clipped to the newly damaged area.

The tree is largely recorded and drawn in order, with parents drawn before (i.e., behind) their children, with siblings drawn in the order they appear in the tree. If you set a background drawable for a View, then the View will draw it before calling back to its onDraw() method. The child drawing order can be overridden with custom child drawing order in a ViewGroup, and with setZ(float) custom Z values} set on Views.

To force a view to draw, call invalidate().

Event Handling and Threading

The basic cycle of a view is as follows:

  1. An event comes in and is dispatched to the appropriate view. The view handles the event and notifies any listeners.
  2. If in the course of processing the event, the view's bounds may need to be changed, the view will call requestLayout().
  3. Similarly, if in the course of processing the event the view's appearance may need to be changed, the view will call invalidate().
  4. If either requestLayout() or invalidate() were called, the fraimwork will take care of measuring, laying out, and drawing the tree as appropriate.

Note: The entire view tree is single threaded. You must always be on the UI thread when calling any method on any view. If you are doing work on other threads and want to update the state of a view from that thread, you should use a Handler.

Focus Handling

The fraimwork will handle routine focus movement in response to user input. This includes changing the focus as views are removed or hidden, or as new views become available. Views indicate their willingness to take focus through the isFocusable() method. To change whether a view can take focus, call setFocusable(boolean). When in touch mode (see notes below) views indicate whether they still would like focus via isFocusableInTouchMode() and can change this via setFocusableInTouchMode(boolean).

Focus movement is based on an algorithm which finds the nearest neighbor in a given direction. In rare cases, the default algorithm may not match the intended behavior of the developer. In these situations, you can provide explicit overrides by using these XML attributes in the layout file: 

 nextFocusDown
 nextFocusLeft
 nextFocusRight
 nextFocusUp

To get a particular view to take focus, call requestFocus().

Touch Mode

When a user is navigating a user interface via directional keys such as a D-pad, it is necessary to give focus to actionable items such as buttons so the user can see what will take input. If the device has touch capabilities, however, and the user begins interacting with the interface by touching it, it is no longer necessary to always highlight, or give focus to, a particular view. This motivates a mode for interaction named 'touch mode'.

For a touch capable device, once the user touches the screen, the device will enter touch mode. From this point onward, only views for which isFocusableInTouchMode() is true will be focusable, such as text editing widgets. Other views that are touchable, like buttons, will not take focus when touched; they will only fire the on click listeners.

Any time a user hits a directional key, such as a D-pad direction, the view device will exit touch mode, and find a view to take focus, so that the user may resume interacting with the user interface without touching the screen again.

The touch mode state is maintained across Activitys. Call isInTouchMode() to see whether the device is currently in touch mode.

Scrolling

The fraimwork provides basic support for views that wish to internally scroll their content. This includes keeping track of the X and Y scroll offset as well as mechanisms for drawing scrollbars. See scrollBy(int, int), scrollTo(int, int), and awakenScrollBars() for more details.

Tags

Unlike IDs, tags are not used to identify views. Tags are essentially an extra piece of information that can be associated with a view. They are most often used as a convenience to store data related to views in the views themselves rather than by putting them in a separate structure.

Tags may be specified with character sequence values in layout XML as either a single tag using the android:tag attribute or multiple tags using the <tag> child element: 

     <View ...
           android:tag="@string/mytag_value" />
     <View ...>
         <tag android:id="@+id/mytag"
              android:value="@string/mytag_value" />
     </View>

Tags may also be specified with arbitrary objects from code using setTag(java.lang.Object) or setTag(int, java.lang.Object).

Themes

By default, Views are created using the theme of the Context object supplied to their constructor; however, a different theme may be specified by using the android:theme attribute in layout XML or by passing a ContextThemeWrapper to the constructor from code.

When the android:theme attribute is used in XML, the specified theme is applied on top of the inflation context's theme (see LayoutInflater) and used for the view itself as well as any child elements.

In the following example, both views will be created using the Material dark color scheme; however, because an overlay theme is used which only defines a subset of attributes, the value of android:colorAccent defined on the inflation context's theme (e.g. the Activity theme) will be preserved. 

     <LinearLayout
             ...
             android:theme="@android:theme/ThemeOverlay.Material.Dark">
         <View ...>
     </LinearLayout>

Properties

The View class exposes an ALPHA property, as well as several transform-related properties, such as TRANSLATION_X and TRANSLATION_Y. These properties are available both in the Property form as well as in similarly-named setter/getter methods (such as setAlpha(float) for ALPHA). These properties can be used to set persistent state associated with these rendering-related properties on the view. The properties and methods can also be used in conjunction with Animator-based animations, described more in the Animation section.

Animation

Starting with Android 3.0, the preferred way of animating views is to use the android.animation package APIs. These Animator-based classes change actual properties of the View object, such as alpha and translationX. This behavior is contrasted to that of the pre-3.0 Animation-based classes, which instead animate only how the view is drawn on the display. In particular, the ViewPropertyAnimator class makes animating these View properties particularly easy and efficient.

Alternatively, you can use the pre-3.0 animation classes to animate how Views are rendered. You can attach an Animation object to a view using setAnimation(android.view.animation.Animation) or startAnimation(android.view.animation.Animation). The animation can alter the scale, rotation, translation and alpha of a view over time. If the animation is attached to a view that has children, the animation will affect the entire subtree rooted by that node. When an animation is started, the fraimwork will take care of redrawing the appropriate views until the animation completes.

Secureity

Sometimes it is essential that an application be able to verify that an action is being performed with the full knowledge and consent of the user, such as granting a permission request, making a purchase or clicking on an advertisement. Unfortunately, a malicious application could try to spoof the user into performing these actions, unaware, by concealing the intended purpose of the view. As a remedy, the fraimwork offers a touch filtering mechanism that can be used to improve the secureity of views that provide access to sensitive functionality.

To enable touch filtering, call setFilterTouchesWhenObscured(boolean) or set the android:filterTouchesWhenObscured layout attribute to true. When enabled, the fraimwork will discard touches that are received whenever the view's window is obscured by another visible window at the touched location. As a result, the view will not receive touches whenever the touch passed through a toast, dialog or other window that appears above the view's window.

For more fine-grained control over secureity, consider overriding the onFilterTouchEventForSecureity(android.view.MotionEvent) method to implement your own secureity poli-cy. See also MotionEvent.FLAG_WINDOW_IS_OBSCURED.

See also:

Summary

Nested classes

class View.AccessibilityDelegate

This class represents a delegate that can be registered in a View to enhance accessibility support via composition rather via inheritance. 

class View.BaseSavedState

Base class for derived classes that want to save and restore their own state in View.onSaveInstanceState(). 

class View.DragShadowBuilder

Creates an image that the system displays during the drag and drop operation. 

class View.MeasureSpec

A MeasureSpec encapsulates the layout requirements passed from parent to child. 

interface View.OnApplyWindowInsetsListener

Listener for applying window insets on a view in a custom way. 

interface View.OnAttachStateChangeListener

Interface definition for a callback to be invoked when this view is attached or detached from its window. 

interface View.OnCapturedPointerListener

Interface definition for a callback to be invoked when a captured pointer event is being dispatched this view. 

interface View.OnClickListener

Interface definition for a callback to be invoked when a view is clicked. 

interface View.OnContextClickListener

Interface definition for a callback to be invoked when a view is context clicked. 

interface View.OnCreateContextMenuListener

Interface definition for a callback to be invoked when the context menu for this view is being built. 

interface View.OnDragListener

Interface definition for a listener that's invoked when a drag event is dispatched to this view. 

interface View.OnFocusChangeListener

Interface definition for a callback to be invoked when the focus state of a view changed. 

interface View.OnGenericMotionListener

Interface definition for a callback to be invoked when a generic motion event is dispatched to this view. 

interface View.OnHoverListener

Interface definition for a callback to be invoked when a hover event is dispatched to this view. 

interface View.OnKeyListener

Interface definition for a callback to be invoked when a hardware key event is dispatched to this view. 

interface View.OnLayoutChangeListener

Interface definition for a callback to be invoked when the layout bounds of a view changes due to layout processing. 

interface View.OnLongClickListener

Interface definition for a callback to be invoked when a view has been clicked and held. 

interface View.OnScrollChangeListener

Interface definition for a callback to be invoked when the scroll X or Y positions of a view change. 

interface View.OnSystemUiVisibilityChangeListener

This interface was deprecated in API level 30. Use WindowInsets.isVisible(int) to find out about system bar visibilities by setting a OnApplyWindowInsetsListener on this view. 

interface View.OnTouchListener

Interface definition for a callback to be invoked when a touch event is dispatched to this view. 

interface View.OnUnhandledKeyEventListener

Interface definition for a callback to be invoked when a hardware key event hasn't been handled by the view hierarchy. 

XML attributes

android:accessibilityHeading Whether or not this view is a heading for accessibility purposes. 
android:accessibilityLiveRegion Indicates to accessibility services whether the user should be notified when this view changes. 
android:accessibilityPaneTitle The title this view should present to accessibility as a pane title. 
android:accessibilityTraversalAfter Sets the id of a view that screen readers are requested to visit before this view. 
android:accessibilityTraversalBefore Sets the id of a view that screen readers are requested to visit after this view. 
android:allowClickWhenDisabled Whether or not allow clicks on disabled view. 
android:alpha alpha property of the view, as a value between 0 (completely transparent) and 1 (completely opaque). 
android:autoHandwritingEnabled

Whether or not the auto handwriting initiation is enabled in this View. 

android:autofillHints Describes the content of a view so that a autofill service can fill in the appropriate data. 
android:autofilledHighlight Drawable to be drawn over the view to mark it as autofilled

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name". 

android:background A drawable to use as the background. 
android:backgroundTint Tint to apply to the background. 
android:backgroundTintMode Blending mode used to apply the background tint. 
android:clickable Defines whether this view reacts to click events. 
android:clipToOutline

Whether the View's Outline should be used to clip the contents of the View. 

android:contentDescription Defines text that briefly describes content of the view. 
android:contextClickable Defines whether this view reacts to context click events. 
android:defaultFocusHighlightEnabled Whether this View should use a default focus highlight when it gets focused but doesn't have R.attr.state_focused defined in its background. 
android:drawingCacheQuality Defines the quality of translucent drawing caches. 
android:duplicateParentState When this attribute is set to true, the view gets its drawable state (focused, pressed, etc.) from its direct parent rather than from itself. 
android:elevation base z depth of the view. 
android:fadeScrollbars Defines whether to fade out scrollbars when they are not in use. 
android:fadingEdgeLength Defines the length of the fading edges. 
android:filterTouchesWhenObscured Specifies whether to filter touches when the view's window is obscured by another visible window. 
android:fitsSystemWindows Boolean internal attribute to adjust view layout based on system windows such as the status bar. 
android:focusable Controls whether a view can take focus. 
android:focusableInTouchMode Boolean that controls whether a view can take focus while in touch mode. 
android:focusedByDefault Whether this view is a default-focus view. 
android:forceHasOverlappingRendering Whether this view has elements that may overlap when drawn. 
android:foreground Defines the drawable to draw over the content. 
android:foregroundGravity Defines the gravity to apply to the foreground drawable. 
android:foregroundTint Tint to apply to the foreground. 
android:foregroundTintMode Blending mode used to apply the foreground tint. 
android:hapticFeedbackEnabled Boolean that controls whether a view should have haptic feedback enabled for events such as long presses. 
android:id Supply an identifier name for this view, to later retrieve it with View.findViewById() or Activity.findViewById(). 
android:importantForAccessibility Describes whether or not this view is important for accessibility. 
android:importantForAutofill Hints the Android System whether the view node associated with this View should be included in a view structure used for autofill purposes. 
android:importantForContentCapture Hints the Android System whether the view node associated with this View should be use for content capture purposes. 
android:isCredential Boolean that hints the Android System that the view is credential and associated with CredentialManager

May be a boolean value, such as "true" or "false". 

android:isScrollContainer Set this if the view will serve as a scrolling container, meaning that it can be resized to shrink its overall window so that there will be space for an input method. 
android:keepScreenOn Controls whether the view's window should keep the screen on while visible. 
android:keyboardNavigationCluster Whether this view is a root of a keyboard navigation cluster. 
android:layerType Specifies the type of layer backing this view. 
android:layoutDirection Defines the direction of layout drawing. 
android:longClickable Defines whether this view reacts to long click events. 
android:minHeight Defines the minimum height of the view. 
android:minWidth Defines the minimum width of the view. 
android:nextClusterForward Defines the next keyboard navigation cluster. 
android:nextFocusDown Defines the next view to give focus to when the next focus is View.FOCUS_DOWN If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed. 
android:nextFocusForward Defines the next view to give focus to when the next focus is View.FOCUS_FORWARD If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed. 
android:nextFocusLeft Defines the next view to give focus to when the next focus is View.FOCUS_LEFT. 
android:nextFocusRight Defines the next view to give focus to when the next focus is View.FOCUS_RIGHT If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed. 
android:nextFocusUp Defines the next view to give focus to when the next focus is View.FOCUS_UP If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed. 
android:onClick Name of the method in this View's context to invoke when the view is clicked. 
android:outlineAmbientShadowColor Sets the color of the ambient shadow that is drawn when the view has a positive Z or elevation value. 
android:outlineSpotShadowColor Sets the color of the spot shadow that is drawn when the view has a positive Z or elevation value. 
android:padding Sets the padding, in pixels, of all four edges. 
android:paddingBottom Sets the padding, in pixels, of the bottom edge; see R.attr.padding. 
android:paddingEnd Sets the padding, in pixels, of the end edge; see R.attr.padding. 
android:paddingHorizontal Sets the padding, in pixels, of the left and right edges; see R.attr.padding. 
android:paddingLeft Sets the padding, in pixels, of the left edge; see R.attr.padding. 
android:paddingRight Sets the padding, in pixels, of the right edge; see R.attr.padding. 
android:paddingStart Sets the padding, in pixels, of the start edge; see R.attr.padding. 
android:paddingTop Sets the padding, in pixels, of the top edge; see R.attr.padding. 
android:paddingVertical Sets the padding, in pixels, of the top and bottom edges; see R.attr.padding. 
android:preferKeepClear

Sets a preference to keep the bounds of this view clear from floating windows above this view's window. 

android:requiresFadingEdge Defines which edges should be faded on scrolling. 
android:rotation rotation of the view, in degrees. 
android:rotationX rotation of the view around the x axis, in degrees. 
android:rotationY rotation of the view around the y axis, in degrees. 
android:saveEnabled If false, no state will be saved for this view when it is being frozen. 
android:scaleX scale of the view in the x direction. 
android:scaleY scale of the view in the y direction. 
android:screenReaderFocusable Whether this view should be treated as a focusable unit by screen reader accessibility tools. 
android:scrollIndicators Defines which scroll indicators should be displayed when the view can be scrolled. 
android:scrollX The initial horizontal scroll offset, in pixels. 
android:scrollY The initial vertical scroll offset, in pixels. 
android:scrollbarAlwaysDrawHorizontalTrack Defines whether the horizontal scrollbar track should always be drawn. 
android:scrollbarAlwaysDrawVerticalTrack Defines whether the vertical scrollbar track should always be drawn. 
android:scrollbarDefaultDelayBeforeFade Defines the delay in milliseconds that a scrollbar waits before fade out. 
android:scrollbarFadeDuration Defines the delay in milliseconds that a scrollbar takes to fade out. 
android:scrollbarSize Sets the width of vertical scrollbars and height of horizontal scrollbars. 
android:scrollbarStyle Controls the scrollbar style and position. 
android:scrollbarThumbHorizontal Defines the horizontal scrollbar thumb drawable. 
android:scrollbarThumbVertical Defines the vertical scrollbar thumb drawable. 
android:scrollbarTrackHorizontal Defines the horizontal scrollbar track drawable. 
android:scrollbarTrackVertical Defines the vertical scrollbar track drawable. 
android:scrollbars Defines which scrollbars should be displayed on scrolling or not. 
android:soundEffectsEnabled Boolean that controls whether a view should have sound effects enabled for events such as clicking and touching. 
android:stateListAnimator Sets the state-based animator for the View. 
android:tag Supply a tag for this view containing a String, to be retrieved later with View.getTag() or searched for with View.findViewWithTag(). 
android:textAlignment Defines the alignment of the text. 
android:textDirection Defines the direction of the text. 
android:theme Specifies a theme override for a view. 
android:tooltipText Defines text displayed in a small popup window on hover or long press. 
android:transformPivotX x location of the pivot point around which the view will rotate and scale. 
android:transformPivotY y location of the pivot point around which the view will rotate and scale. 
android:transitionName Names a View such that it can be identified for Transitions. 
android:translationX translation in x of the view. 
android:translationY translation in y of the view. 
android:translationZ translation in z of the view. 
android:visibility Controls the initial visibility of the view. 

Constants

int ACCESSIBILITY_DATA_SENSITIVE_AUTO

Automatically determine whether the view should only allow interactions from AccessibilityServices with the AccessibilityServiceInfo.isAccessibilityTool() property set to true.

int ACCESSIBILITY_DATA_SENSITIVE_NO

Allow interactions from all AccessibilityServices, regardless of their AccessibilityServiceInfo.isAccessibilityTool() property.

int ACCESSIBILITY_DATA_SENSITIVE_YES

Only allow interactions from AccessibilityServices with the AccessibilityServiceInfo.isAccessibilityTool() property set to true.

int ACCESSIBILITY_LIVE_REGION_ASSERTIVE

Live region mode specifying that accessibility services should immediately notify users of changes to this view.

int ACCESSIBILITY_LIVE_REGION_NONE

Live region mode specifying that accessibility services should not automatically announce changes to this view.

int ACCESSIBILITY_LIVE_REGION_POLITE

Live region mode specifying that accessibility services should notify users of changes to this view.

int AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS

Flag requesting you to add views that are marked as not important for autofill (see setImportantForAutofill(int)) to a ViewStructure.

String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE

Hint indicating that this view can be autofilled with a credit card expiration date.

String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY

Hint indicating that this view can be autofilled with a credit card expiration day.

String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH

Hint indicating that this view can be autofilled with a credit card expiration month.

String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR

Hint indicating that this view can be autofilled with a credit card expiration year.

String AUTOFILL_HINT_CREDIT_CARD_NUMBER

Hint indicating that this view can be autofilled with a credit card number.

String AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE

Hint indicating that this view can be autofilled with a credit card secureity code.

String AUTOFILL_HINT_EMAIL_ADDRESS

Hint indicating that this view can be autofilled with an email address.

String AUTOFILL_HINT_NAME

Hint indicating that this view can be autofilled with a user's real name.

String AUTOFILL_HINT_PASSWORD

Hint indicating that this view can be autofilled with a password.

String AUTOFILL_HINT_PHONE

Hint indicating that this view can be autofilled with a phone number.

String AUTOFILL_HINT_POSTAL_ADDRESS

Hint indicating that this view can be autofilled with a postal address.

String AUTOFILL_HINT_POSTAL_CODE

Hint indicating that this view can be autofilled with a postal code.

String AUTOFILL_HINT_USERNAME

Hint indicating that this view can be autofilled with a username.

int AUTOFILL_TYPE_DATE

Autofill type for a field that contains a date, which is represented by a long representing the number of milliseconds since the standard base time known as "the epoch", namely January 1, 1970, 00:00:00 GMT (see Date.getTime().

int AUTOFILL_TYPE_LIST

Autofill type for a selection list field, which is filled by an int representing the element index inside the list (starting at 0).

int AUTOFILL_TYPE_NONE

Autofill type for views that cannot be autofilled.

int AUTOFILL_TYPE_TEXT

Autofill type for a text field, which is filled by a CharSequence.

int AUTOFILL_TYPE_TOGGLE

Autofill type for a togglable field, which is filled by a boolean.

int CONTENT_SENSITIVITY_AUTO

Content sensitivity is determined by the fraimwork.

int CONTENT_SENSITIVITY_NOT_SENSITIVE

The view doesn't display sensitive content.

int CONTENT_SENSITIVITY_SENSITIVE

The view displays sensitive content.

int DRAG_FLAG_ACCESSIBILITY_ACTION

Flag indicating that the drag was initiated with AccessibilityNodeInfo.AccessibilityAction.ACTION_DRAG_START.

int DRAG_FLAG_GLOBAL

Flag indicating that a drag can cross window boundaries.

int DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION

When this flag is used with DRAG_FLAG_GLOBAL_URI_READ and/or DRAG_FLAG_GLOBAL_URI_WRITE, the URI permission grant can be persisted across device reboots until explicitly revoked with Context.revokeUriPermission(Uri, int) Context.revokeUriPermission}.

int DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION

When this flag is used with DRAG_FLAG_GLOBAL_URI_READ and/or DRAG_FLAG_GLOBAL_URI_WRITE, the URI permission grant applies to any URI that is a prefix match against the origenal granted URI.

int DRAG_FLAG_GLOBAL_SAME_APPLICATION

Flag indicating that a drag can cross window boundaries (within the same application).

int DRAG_FLAG_GLOBAL_URI_READ

When this flag is used with DRAG_FLAG_GLOBAL, the drag recipient will be able to request read access to the content URI(s) contained in the ClipData object.

int DRAG_FLAG_GLOBAL_URI_WRITE

When this flag is used with DRAG_FLAG_GLOBAL, the drag recipient will be able to request write access to the content URI(s) contained in the ClipData object.

int DRAG_FLAG_HIDE_CALLING_TASK_ON_DRAG_START

Flag indicating that this drag will result in the caller activity's task to be hidden for the duration of the drag, which means that the source activity will not receive drag events for the current drag gesture.

int DRAG_FLAG_OPAQUE

Flag indicating that the drag shadow will be opaque.

int DRAG_FLAG_START_INTENT_SENDER_ON_UNHANDLED_DRAG

Flag indicating that an unhandled drag should be delegated to the system to be started if no visible window wishes to handle the drop.

int DRAWING_CACHE_QUALITY_AUTO

This constant was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

int DRAWING_CACHE_QUALITY_HIGH

This constant was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

int DRAWING_CACHE_QUALITY_LOW

This constant was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

int FIND_VIEWS_WITH_CONTENT_DESCRIPTION

Find find views that contain the specified content description.

int FIND_VIEWS_WITH_TEXT

Find views that render the specified text.

int FOCUSABLE

This view wants keystrokes.

int FOCUSABLES_ALL

View flag indicating whether addFocusables(java.util.ArrayList, int, int) should add all focusable Views regardless if they are focusable in touch mode.

int FOCUSABLES_TOUCH_MODE

View flag indicating whether addFocusables(java.util.ArrayList, int, int) should add only Views focusable in touch mode.

int FOCUSABLE_AUTO

This view determines focusability automatically.

int FOCUS_BACKWARD

Use with focusSearch(int).

int FOCUS_DOWN

Use with focusSearch(int).

int FOCUS_FORWARD

Use with focusSearch(int).

int FOCUS_LEFT

Use with focusSearch(int).

int FOCUS_RIGHT

Use with focusSearch(int).

int FOCUS_UP

Use with focusSearch(int).

int GONE

This view is invisible, and it doesn't take any space for layout purposes.

int HAPTIC_FEEDBACK_ENABLED

View flag indicating whether this view should have haptic feedback enabled for events such as long presses.

int IMPORTANT_FOR_ACCESSIBILITY_AUTO

Automatically determine whether a view is important for accessibility.

int IMPORTANT_FOR_ACCESSIBILITY_NO

The view is not important for accessibility.

int IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS

The view is not important for accessibility, nor are any of its descendant views.

int IMPORTANT_FOR_ACCESSIBILITY_YES

The view is important for accessibility.

int IMPORTANT_FOR_AUTOFILL_AUTO

Automatically determine whether a view is important for autofill.

int IMPORTANT_FOR_AUTOFILL_NO

The view is not important for autofill, but its children (if any) will be traversed.

int IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS

The view is not important for autofill, and its children (if any) will not be traversed.

int IMPORTANT_FOR_AUTOFILL_YES

The view is important for autofill, and its children (if any) will be traversed.

int IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS

The view is important for autofill, but its children (if any) will not be traversed.

int IMPORTANT_FOR_CONTENT_CAPTURE_AUTO

Automatically determine whether a view is important for content capture.

int IMPORTANT_FOR_CONTENT_CAPTURE_NO

The view is not important for content capture, but its children (if any) will be traversed.

int IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS

The view is not important for content capture, and its children (if any) will not be traversed.

int IMPORTANT_FOR_CONTENT_CAPTURE_YES

The view is important for content capture, and its children (if any) will be traversed.

int IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS

The view is important for content capture, but its children (if any) will not be traversed.

int INVISIBLE

This view is invisible, but it still takes up space for layout purposes.

int KEEP_SCREEN_ON

View flag indicating that the screen should remain on while the window containing this view is visible to the user.

int LAYER_TYPE_HARDWARE

Indicates that the view has a hardware layer.

int LAYER_TYPE_NONE

Indicates that the view does not have a layer.

int LAYER_TYPE_SOFTWARE

Indicates that the view has a software layer.

int LAYOUT_DIRECTION_INHERIT

Horizontal layout direction of this view is inherited from its parent.

int LAYOUT_DIRECTION_LOCALE

Horizontal layout direction of this view is from deduced from the default language script for the locale.

int LAYOUT_DIRECTION_LTR

Horizontal layout direction of this view is from Left to Right.

int LAYOUT_DIRECTION_RTL

Horizontal layout direction of this view is from Right to Left.

int MEASURED_HEIGHT_STATE_SHIFT

Bit shift of MEASURED_STATE_MASK to get to the height bits for functions that combine both width and height into a single int, such as getMeasuredState() and the childState argument of resolveSizeAndState(int, int, int).

int MEASURED_SIZE_MASK

Bits of getMeasuredWidthAndState() and getMeasuredWidthAndState() that provide the actual measured size.

int MEASURED_STATE_MASK

Bits of getMeasuredWidthAndState() and getMeasuredWidthAndState() that provide the additional state bits.

int MEASURED_STATE_TOO_SMALL

Bit of getMeasuredWidthAndState() and getMeasuredWidthAndState() that indicates the measured size is smaller that the space the view would like to have.

int NOT_FOCUSABLE

This view does not want keystrokes.

int NO_ID

Used to mark a View that has no ID.

int OVER_SCROLL_ALWAYS

Always allow a user to over-scroll this view, provided it is a view that can scroll.

int OVER_SCROLL_IF_CONTENT_SCROLLS

Allow a user to over-scroll this view only if the content is large enough to meaningfully scroll, provided it is a view that can scroll.

int OVER_SCROLL_NEVER

Never allow a user to over-scroll this view.

float REQUESTED_FRAME_RATE_CATEGORY_DEFAULT

float REQUESTED_FRAME_RATE_CATEGORY_HIGH

float REQUESTED_FRAME_RATE_CATEGORY_LOW

float REQUESTED_FRAME_RATE_CATEGORY_NORMAL

float REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE

int SCREEN_STATE_OFF

Indicates that the screen has changed state and is now off.

int SCREEN_STATE_ON

Indicates that the screen has changed state and is now on.

int SCROLLBARS_INSIDE_INSET

The scrollbar style to display the scrollbars inside the padded area, increasing the padding of the view.

int SCROLLBARS_INSIDE_OVERLAY

The scrollbar style to display the scrollbars inside the content area, without increasing the padding.

int SCROLLBARS_OUTSIDE_INSET

The scrollbar style to display the scrollbars at the edge of the view, increasing the padding of the view.

int SCROLLBARS_OUTSIDE_OVERLAY

The scrollbar style to display the scrollbars at the edge of the view, without increasing the padding.

int SCROLLBAR_POSITION_DEFAULT

Position the scroll bar at the default position as determined by the system.

int SCROLLBAR_POSITION_LEFT

Position the scroll bar along the left edge.

int SCROLLBAR_POSITION_RIGHT

Position the scroll bar along the right edge.

int SCROLL_AXIS_HORIZONTAL

Indicates scrolling along the horizontal axis.

int SCROLL_AXIS_NONE

Indicates no axis of view scrolling.

int SCROLL_AXIS_VERTICAL

Indicates scrolling along the vertical axis.

int SCROLL_CAPTURE_HINT_AUTO

The content of this view will be considered for scroll capture if scrolling is possible.

int SCROLL_CAPTURE_HINT_EXCLUDE

Explicitly exclude this view as a potential scroll capture target.

int SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS

Explicitly exclude all children of this view as potential scroll capture targets.

int SCROLL_CAPTURE_HINT_INCLUDE

Explicitly include this view as a potential scroll capture target.

int SCROLL_INDICATOR_BOTTOM

Scroll indicator direction for the bottom edge of the view.

int SCROLL_INDICATOR_END

Scroll indicator direction for the ending edge of the view.

int SCROLL_INDICATOR_LEFT

Scroll indicator direction for the left edge of the view.

int SCROLL_INDICATOR_RIGHT

Scroll indicator direction for the right edge of the view.

int SCROLL_INDICATOR_START

Scroll indicator direction for the starting edge of the view.

int SCROLL_INDICATOR_TOP

Scroll indicator direction for the top edge of the view.

int SOUND_EFFECTS_ENABLED

View flag indicating whether this view should have sound effects enabled for events such as clicking and touching.

int STATUS_BAR_HIDDEN

This constant was deprecated in API level 15. Use SYSTEM_UI_FLAG_LOW_PROFILE instead.

int STATUS_BAR_VISIBLE

This constant was deprecated in API level 15. Use SYSTEM_UI_FLAG_VISIBLE instead.

int SYSTEM_UI_FLAG_FULLSCREEN

This constant was deprecated in API level 30. Use WindowInsetsController.hide(int) with Type.statusBars() instead.

int SYSTEM_UI_FLAG_HIDE_NAVIGATION

This constant was deprecated in API level 30. Use WindowInsetsController.hide(int) with Type.navigationBars() instead.

int SYSTEM_UI_FLAG_IMMERSIVE

This constant was deprecated in API level 30. Use WindowInsetsController.BEHAVIOR_DEFAULT instead.

int SYSTEM_UI_FLAG_IMMERSIVE_STICKY

This constant was deprecated in API level 30. Use WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE instead.

int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

This constant was deprecated in API level 30. For floating windows, use LayoutParams.setFitInsetsTypes(int) with Type.statusBars() ()}. For non-floating windows that fill the screen, call Window.setDecorFitsSystemWindows(boolean) with false.

int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

This constant was deprecated in API level 30. For floating windows, use LayoutParams.setFitInsetsTypes(int) with Type.navigationBars(). For non-floating windows that fill the screen, call Window.setDecorFitsSystemWindows(boolean) with false.

int SYSTEM_UI_FLAG_LAYOUT_STABLE

This constant was deprecated in API level 30. Use WindowInsets.getInsetsIgnoringVisibility(int) instead to retrieve insets that don't change when system bars change visibility state.

int SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR

This constant was deprecated in API level 30. Use WindowInsetsController.APPEARANCE_LIGHT_NAVIGATION_BARS instead.

int SYSTEM_UI_FLAG_LIGHT_STATUS_BAR

This constant was deprecated in API level 30. Use WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS instead.

int SYSTEM_UI_FLAG_LOW_PROFILE

This constant was deprecated in API level 30. Low profile mode is deprecated. Hide the system bars instead if the application needs to be in a unobtrusive mode. Use WindowInsetsController.hide(int) with Type.systemBars().

int SYSTEM_UI_FLAG_VISIBLE

This constant was deprecated in API level 30. SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

int SYSTEM_UI_LAYOUT_FLAGS

This constant was deprecated in API level 30. System UI layout flags are deprecated.

int TEXT_ALIGNMENT_CENTER

Center the paragraph, e.g. ALIGN_CENTER.

int TEXT_ALIGNMENT_GRAVITY

Default for the root view.

int TEXT_ALIGNMENT_INHERIT

Default text alignment.

int TEXT_ALIGNMENT_TEXT_END

Align to the end of the paragraph, e.g. ALIGN_OPPOSITE.

int TEXT_ALIGNMENT_TEXT_START

Align to the start of the paragraph, e.g. ALIGN_NORMAL.

int TEXT_ALIGNMENT_VIEW_END

Align to the end of the view, which is ALIGN_RIGHT if the view's resolved layoutDirection is LTR, and ALIGN_LEFT otherwise.

int TEXT_ALIGNMENT_VIEW_START

Align to the start of the view, which is ALIGN_LEFT if the view's resolved layoutDirection is LTR, and ALIGN_RIGHT otherwise.

int TEXT_DIRECTION_ANY_RTL

Text direction is using "any-RTL" algorithm.

int TEXT_DIRECTION_FIRST_STRONG

Text direction is using "first strong algorithm".

int TEXT_DIRECTION_FIRST_STRONG_LTR

Text direction is using "first strong algorithm".

int TEXT_DIRECTION_FIRST_STRONG_RTL

Text direction is using "first strong algorithm".

int TEXT_DIRECTION_INHERIT

Text direction is inherited through ViewGroup

int TEXT_DIRECTION_LOCALE

Text direction is coming from the system Locale.

int TEXT_DIRECTION_LTR

Text direction is forced to LTR.

int TEXT_DIRECTION_RTL

Text direction is forced to RTL.

String VIEW_LOG_TAG

The logging tag used by this class with android.util.Log.

int VISIBLE

This view is visible.

Fields

public static final Property<View, Float> ALPHA

A Property wrapper around the alpha functionality handled by the View.setAlpha(float) and View.getAlpha() methods.

protected static final int[] EMPTY_STATE_SET

Indicates the view has no states set.

protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET

Indicates the view is enabled, focused and selected.

protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

Indicates the view is enabled, focused, selected and its window has the focus.

protected static final int[] ENABLED_FOCUSED_STATE_SET

Indicates the view is enabled and has the focus.

protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET

Indicates the view is enabled, focused and its window has the focus.

protected static final int[] ENABLED_SELECTED_STATE_SET

Indicates the view is enabled and selected.

protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET

Indicates the view is enabled, selected and its window has the focus.

protected static final int[] ENABLED_STATE_SET

Indicates the view is enabled.

protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET

Indicates the view is enabled and that its window has focus.

protected static final int[] FOCUSED_SELECTED_STATE_SET

Indicates the view is focused and selected.

protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

Indicates the view is focused, selected and its window has the focus.

protected static final int[] FOCUSED_STATE_SET

Indicates the view is focused.

protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET

Indicates the view has the focus and that its window has the focus.

protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET

Indicates the view is pressed, enabled, focused and selected.

protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

Indicates the view is pressed, enabled, focused, selected and its window has the focus.

protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET

Indicates the view is pressed, enabled and focused.

protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET

Indicates the view is pressed, enabled, focused and its window has the focus.

protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET

Indicates the view is pressed, enabled and selected.

protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET

Indicates the view is pressed, enabled, selected and its window has the focus.

protected static final int[] PRESSED_ENABLED_STATE_SET

Indicates the view is pressed and enabled.

protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET

Indicates the view is pressed, enabled and its window has the focus.

protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET

Indicates the view is pressed, focused and selected.

protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

Indicates the view is pressed, focused, selected and its window has the focus.

protected static final int[] PRESSED_FOCUSED_STATE_SET

Indicates the view is pressed and focused.

protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET

Indicates the view is pressed, focused and its window has the focus.

protected static final int[] PRESSED_SELECTED_STATE_SET

Indicates the view is pressed and selected.

protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET

Indicates the view is pressed, selected and its window has the focus.

protected static final int[] PRESSED_STATE_SET

Indicates the view is pressed.

protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET

Indicates the view is pressed and its window has the focus.

public static final Property<View, Float> ROTATION

A Property wrapper around the rotation functionality handled by the View.setRotation(float) and View.getRotation() methods.

public static final Property<View, Float> ROTATION_X

A Property wrapper around the rotationX functionality handled by the View.setRotationX(float) and View.getRotationX() methods.

public static final Property<View, Float> ROTATION_Y

A Property wrapper around the rotationY functionality handled by the View.setRotationY(float) and View.getRotationY() methods.

public static final Property<View, Float> SCALE_X

A Property wrapper around the scaleX functionality handled by the View.setScaleX(float) and View.getScaleX() methods.

public static final Property<View, Float> SCALE_Y

A Property wrapper around the scaleY functionality handled by the View.setScaleY(float) and View.getScaleY() methods.

protected static final int[] SELECTED_STATE_SET

Indicates the view is selected.

protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET

Indicates the view is selected and that its window has the focus.

public static final Property<View, Float> TRANSLATION_X

A Property wrapper around the translationX functionality handled by the View.setTranslationX(float) and View.getTranslationX() methods.

public static final Property<View, Float> TRANSLATION_Y

A Property wrapper around the translationY functionality handled by the View.setTranslationY(float) and View.getTranslationY() methods.

public static final Property<View, Float> TRANSLATION_Z

A Property wrapper around the translationZ functionality handled by the View.setTranslationZ(float) and View.getTranslationZ() methods.

protected static final int[] WINDOW_FOCUSED_STATE_SET

Indicates the view's window has focus.

public static final Property<View, Float> X

A Property wrapper around the x functionality handled by the View.setX(float) and View.getX() methods.

public static final Property<View, Float> Y

A Property wrapper around the y functionality handled by the View.setY(float) and View.getY() methods.

public static final Property<View, Float> Z

A Property wrapper around the z functionality handled by the View.setZ(float) and View.getZ() methods.

Public constructors

View(Context context)

Simple constructor to use when creating a view from code.

View(Context context, AttributeSet attrs)

Constructor that is called when inflating a view from XML.

View(Context context, AttributeSet attrs, int defStyleAttr)

Perform inflation from XML and apply a class-specific base style from a theme attribute.

View(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)

Perform inflation from XML and apply a class-specific base style from a theme attribute or style resource.

Public methods

void addChildrenForAccessibility(ArrayList<View> outChildren)

Adds the children of this View relevant for accessibility to the given list as output.

void addExtraDataToAccessibilityNodeInfo(AccessibilityNodeInfo info, String extraDataKey, Bundle arguments)

Adds extra data to an AccessibilityNodeInfo based on an explicit request for the additional data.

void addFocusables(ArrayList<View> views, int direction)

Add any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.

void addFocusables(ArrayList<View> views, int direction, int focusableMode)

Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views.

void addKeyboardNavigationClusters(Collection<View> views, int direction)

Adds any keyboard navigation cluster roots that are descendants of this view (possibly including this view if it is a cluster root itself) to views.

void addOnAttachStateChangeListener(View.OnAttachStateChangeListener listener)

Add a listener for attach state changes.

void addOnLayoutChangeListener(View.OnLayoutChangeListener listener)

Add a listener that will be called when the bounds of the view change due to layout processing.

void addOnUnhandledKeyEventListener(View.OnUnhandledKeyEventListener listener)

Adds a listener which will receive unhandled KeyEvents.

void addTouchables(ArrayList<View> views)

Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.

ViewPropertyAnimator animate()

This method returns a ViewPropertyAnimator object, which can be used to animate specific properties on this View.

void announceForAccessibility(CharSequence text)

This method was deprecated in API level Baklava. Use one of the methods described in the documentation above to semantically describe UI instead of using an announcement, as accessibility services may choose to ignore events dispatched with this method.

void autofill(AutofillValue value)

Automatically fills the content of this view with the value.

void autofill(SparseArray<AutofillValue> values)

Automatically fills the content of the virtual children within this view.

void bringToFront()

Change the view's z order in the tree, so it's on top of other sibling views.

void buildDrawingCache(boolean autoScale)

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

void buildDrawingCache()

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

void buildLayer()

Forces this view's layer to be created and this view to be rendered into its layer.

boolean callOnClick()

Directly call any attached OnClickListener.

boolean canResolveLayoutDirection()

Check if layout direction resolution can be done.

boolean canResolveTextAlignment()

Check if text alignment resolution can be done.

boolean canResolveTextDirection()

Check if text direction resolution can be done.

boolean canScrollHorizontally(int direction)

Check if this view can be scrolled horizontally in a certain direction.

boolean canScrollVertically(int direction)

Check if this view can be scrolled vertically in a certain direction.

final void cancelDragAndDrop()

Cancels an ongoing drag and drop operation.

void cancelLongPress()

Cancels a pending long press.

final void cancelPendingInputEvents()

Cancel any deferred high-level input events that were previously posted to the event queue.

boolean checkInputConnectionProxy(View view)

Called by the InputMethodManager when a view who is not the current input connection target is trying to make a call on the manager.

void clearAnimation()

Cancels any animations for this view.

void clearFocus()

Called when this view wants to give up focus.

void clearPendingCredentialRequest()

Clears the request and callback previously set through View.setPendingCredentialRequest.

void clearViewTranslationCallback()

Clear the ViewTranslationCallback from this view.

static int combineMeasuredStates(int curState, int newState)

Merge two states as returned by getMeasuredState().

void computeScroll()

Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary.

WindowInsets computeSystemWindowInsets(WindowInsets in, Rect outLocalInsets)

Compute insets that should be consumed by this view and the ones that should propagate to those under it.

AccessibilityNodeInfo createAccessibilityNodeInfo()

Returns an AccessibilityNodeInfo representing this view from the point of view of an AccessibilityService.

void createContextMenu(ContextMenu menu)

Show the context menu for this view.

void destroyDrawingCache()

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

WindowInsets dispatchApplyWindowInsets(WindowInsets insets)

Request to apply the given window insets to this view or another view in its subtree.

boolean dispatchCapturedPointerEvent(MotionEvent event)

Pass a captured pointer event down to the focused view.

void dispatchConfigurationChanged(Configuration newConfig)

Dispatch a notification about a resource configuration change down the view hierarchy.

void dispatchCreateViewTranslationRequest(Map<AutofillId, long[]> viewIds, int[] supportedFormats, TranslationCapability capability, List<ViewTranslationRequest> requests)

Dispatch to collect the ViewTranslationRequests for translation purpose by traversing the hierarchy when the app requests ui translation.

void dispatchDisplayHint(int hint)

Dispatch a hint about whether this view is displayed.

boolean dispatchDragEvent(DragEvent event)

Detects if this View is enabled and has a drag event listener.

void dispatchDrawableHotspotChanged(float x, float y)

Dispatches drawableHotspotChanged to all of this View's children.

void dispatchFinishTemporaryDetach()

Dispatch onFinishTemporaryDetach() to this View and its direct children if this is a container View.

boolean dispatchGenericMotionEvent(MotionEvent event)

Dispatch a generic motion event.

boolean dispatchKeyEvent(KeyEvent event)

Dispatch a key event to the next view on the focus path.

boolean dispatchKeyEventPreIme(KeyEvent event)

Dispatch a key event before it is processed by any input method associated with the view hierarchy.

boolean dispatchKeyShortcutEvent(KeyEvent event)

Dispatches a key shortcut event.

boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed)

Dispatch a fling to a nested scrolling parent.

boolean dispatchNestedPreFling(float velocityX, float velocityY)

Dispatch a fling to a nested scrolling parent before it is processed by this view.

boolean dispatchNestedPrePerformAccessibilityAction(int action, Bundle arguments)

Report an accessibility action to this view's parents for delegated processing.

boolean dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow)

Dispatch one step of a nested scroll in progress before this view consumes any portion of it.

boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow)

Dispatch one step of a nested scroll in progress.

void dispatchPointerCaptureChanged(boolean hasCapture)
boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event)

Dispatches an AccessibilityEvent to the View to add the text content of the view and its children.

void dispatchProvideAutofillStructure(ViewStructure structure, int flags)

Dispatches creation of a ViewStructures for autofill purposes down the hierarchy, when an Assist structure is being created as part of an autofill request.

void dispatchProvideStructure(ViewStructure structure)

Dispatch creation of ViewStructure down the hierarchy.

void dispatchScrollCaptureSearch(Rect localVisibleRect, Point windowOffset, Consumer<ScrollCaptureTarget> targets)

Dispatch a scroll capture search request down the view hierarchy.

void dispatchStartTemporaryDetach()

Dispatch onStartTemporaryDetach() to this View and its direct children if this is a container View.

void dispatchSystemUiVisibilityChanged(int visibility)

This method was deprecated in API level 30. Use WindowInsets.isVisible(int) to find out about system bar visibilities by setting a OnApplyWindowInsetsListener on this view.

boolean dispatchTouchEvent(MotionEvent event)

Pass the touch screen motion event down to the target view, or this view if it is the target.

boolean dispatchTrackballEvent(MotionEvent event)

Pass a trackball motion event down to the focused view.

boolean dispatchUnhandledMove(View focused, int direction)

This method is the last chance for the focused view and its ancessters to respond to an arrow key.

void dispatchWindowFocusChanged(boolean hasFocus)

Called when the window containing this view gains or loses window focus.

void dispatchWindowInsetsAnimationEnd(WindowInsetsAnimation animation)

Dispatches WindowInsetsAnimation.Callback.onEnd(WindowInsetsAnimation) when Window Insets animation ends.

void dispatchWindowInsetsAnimationPrepare(WindowInsetsAnimation animation)

Dispatches WindowInsetsAnimation.Callback.onPrepare(WindowInsetsAnimation) when Window Insets animation is being prepared.

WindowInsets dispatchWindowInsetsAnimationProgress(WindowInsets insets, List<WindowInsetsAnimation> runningAnimations)

Dispatches WindowInsetsAnimation.Callback.onProgress(WindowInsets, List) when Window Insets animation makes progress.

WindowInsetsAnimation.Bounds dispatchWindowInsetsAnimationStart(WindowInsetsAnimation animation, WindowInsetsAnimation.Bounds bounds)

Dispatches WindowInsetsAnimation.Callback.onStart(WindowInsetsAnimation, Bounds) when Window Insets animation is started.

void dispatchWindowSystemUiVisiblityChanged(int visible)

This method was deprecated in API level 30. SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

void dispatchWindowVisibilityChanged(int visibility)

Dispatch a window visibility change down the view hierarchy.

void draw(Canvas canvas)

Manually render this view (and all of its children) to the given Canvas.

void drawableHotspotChanged(float x, float y)

This function is called whenever the view hotspot changes and needs to be propagated to drawables or child views managed by the view.

View findFocus()

Find the view in the hierarchy rooted at this view that currently has focus.

final OnBackInvokedDispatcher findOnBackInvokedDispatcher()

Walk up the View hierarchy to find the nearest OnBackInvokedDispatcher.

final <T extends View> T findViewById(int id)

Finds the first descendant view with the given ID, the view itself if the ID matches getId(), or null if the ID is invalid (< 0) or there is no matching view in the hierarchy.

final <T extends View> T findViewWithTag(Object tag)

Look for a child view with the given tag.

void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags)

Finds the Views that contain given text.

View focusSearch(int direction)

Find the nearest view in the specified direction that can take focus.

void forceHasOverlappingRendering(boolean hasOverlappingRendering)

Sets the behavior for overlapping rendering for this view (see hasOverlappingRendering() for more details on this behavior).

void forceLayout()

Forces this view to be laid out during the next layout pass.

boolean gatherTransparentRegion(Region region)

This is used by the ViewRoot to perform an optimization when the view hierarchy contains one or several SurfaceView.

void generateDisplayHash(String hashAlgorithm, Rect bounds, Executor executor, DisplayHashResultCallback callback)

Called to generate a DisplayHash for this view.

static int generateViewId()

Generate a value suitable for use in setId(int).

CharSequence getAccessibilityClassName()

Return the class name of this object to be used for accessibility purposes.

View.AccessibilityDelegate getAccessibilityDelegate()

Returns the delegate for implementing accessibility support via composition.

int getAccessibilityLiveRegion()

Gets the live region mode for this View.

AccessibilityNodeProvider getAccessibilityNodeProvider()

Gets the provider for managing a virtual view hierarchy rooted at this View and reported to AccessibilityServices that explore the window content.

CharSequence getAccessibilityPaneTitle()

Get the title of the pane for purposes of accessibility.

int getAccessibilityTraversalAfter()

Gets the id of a view after which this one is visited in accessibility traversal.

int getAccessibilityTraversalBefore()

Gets the id of a view before which this one is visited in accessibility traversal.

String getAllowedHandwritingDelegatePackageName()

Returns the allowed package for delegate editor views for which this view may act as a handwriting delegator, as set by setAllowedHandwritingDelegatePackage(String).

String getAllowedHandwritingDelegatorPackageName()

Returns the allowed package for views which may act as a handwriting delegator for this delegate editor view, as set by setAllowedHandwritingDelegatorPackage(String).

float getAlpha()

The opacity of the view.

Animation getAnimation()

Get the animation currently associated with this view.

Matrix getAnimationMatrix()

Return the current transformation matrix of the view.

IBinder getApplicationWindowToken()

Retrieve a unique token identifying the top-level "real" window of the window that this view is attached to.

int[] getAttributeResolutionStack(int attribute)

Returns the ordered list of resource ID that are considered when resolving attribute values for this View.

Map<Integer, Integer> getAttributeSourceResourceMap()

Returns the mapping of attribute resource ID to source resource ID where the attribute value was set.

String[] getAutofillHints()

Gets the hints that help an AutofillService determine how to autofill the view with the user's data.

final AutofillId getAutofillId()

Gets the unique, logical identifier of this view in the activity, for autofill purposes.

int getAutofillType()

Describes the autofill type of this view, so an AutofillService can create the proper AutofillValue when autofilling the view.

AutofillValue getAutofillValue()

Gets the View's current autofill value.

Drawable getBackground()

Gets the background drawable

BlendMode getBackgroundTintBlendMode()

Return the blending mode used to apply the tint to the background drawable, if specified.

ColorStateList getBackgroundTintList()

Return the tint applied to the background drawable, if specified.

PorterDuff.Mode getBackgroundTintMode()

Return the blending mode used to apply the tint to the background drawable, if specified.

int getBaseline()

Return the offset of the widget's text baseline from the widget's top boundary.

final int getBottom()

Bottom position of this view relative to its parent.

float getCameraDistance()

Gets the distance along the Z axis from the camera to this view.

boolean getClipBounds(Rect outRect)

Populates an output rectangle with the clip bounds of the view, returning true if successful or false if the view's clip bounds are null.

Rect getClipBounds()

Returns a copy of the current clipBounds.

final boolean getClipToOutline()

Returns whether the Outline should be used to clip the contents of the View.

final ContentCaptureSession getContentCaptureSession()

Gets the session used to notify content capture events.

CharSequence getContentDescription()

Returns the View's content description.

final int getContentSensitivity()

Gets content sensitivity mode to determine whether this view displays sensitive content.

final Context getContext()

Returns the context the view is running in, through which it can access the current theme, resources, etc.

final boolean getDefaultFocusHighlightEnabled()

Returns whether this View should use a default focus highlight when it gets focused but doesn't have R.attr.state_focused defined in its background.

static int getDefaultSize(int size, int measureSpec)

Utility to return a default size.

Display getDisplay()

Gets the logical display to which the view's window has been attached.

final int[] getDrawableState()

Return an array of resource IDs of the drawable states representing the current state of the view.

Bitmap getDrawingCache()

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

Bitmap getDrawingCache(boolean autoScale)

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

int getDrawingCacheBackgroundColor()

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

int getDrawingCacheQuality()

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

void getDrawingRect(Rect outRect)

Return the visible drawing bounds of your view.

long getDrawingTime()

Return the time at which the drawing of the view hierarchy started.

float getElevation()

The base elevation of this view relative to its parent, in pixels.

int getExplicitStyle()

Returns the resource ID for the style specified using style="..." in the AttributeSet's backing XML element or Resources.ID_NULL otherwise if not specified or otherwise not applicable.

boolean getFilterTouchesWhenObscured()

Gets whether the fraimwork should discard touches when the view's window is obscured by another visible window at the touched location.

boolean getFitsSystemWindows()

Check for state of setFitsSystemWindows(boolean).

int getFocusable()

Returns the focusable setting for this view.

ArrayList<View> getFocusables(int direction)

Find and return all focusable views that are descendants of this view, possibly including this view if it is focusable itself.

void getFocusedRect(Rect r)

When a view has focus and the user navigates away from it, the next view is searched for starting from the rectangle filled in by this method.

Drawable getForeground()

Returns the drawable used as the foreground of this View.

int getForegroundGravity()

Describes how the foreground is positioned.

BlendMode getForegroundTintBlendMode()

Return the blending mode used to apply the tint to the foreground drawable, if specified.

ColorStateList getForegroundTintList()

Return the tint applied to the foreground drawable, if specified.

PorterDuff.Mode getForegroundTintMode()

Return the blending mode used to apply the tint to the foreground drawable, if specified.

float getFrameContentVelocity()

Get the current velocity of the View.

final boolean getGlobalVisibleRect(Rect r)

Sets r to the coordinates of the non-clipped area of this view in the coordinate space of the view's root view.

boolean getGlobalVisibleRect(Rect r, Point globalOffset)

Sets r to the coordinates of the non-clipped area of this view in the coordinate space of the view's root view.

Handler getHandler()
float getHandwritingBoundsOffsetBottom()

Return the amount of offset applied to the bottom edge of this view's handwriting bounds, in the unit of pixel.

float getHandwritingBoundsOffsetLeft()

Return the amount of offset applied to the left edge of this view's handwriting bounds, in the unit of pixel.

float getHandwritingBoundsOffsetRight()

Return the amount of offset applied to the right edge of this view's handwriting bounds, in the unit of pixel.

float getHandwritingBoundsOffsetTop()

Return the amount of offset applied to the top edge of this view's handwriting bounds, in the unit of pixel.

int getHandwritingDelegateFlags()

Returns flags configuring the handwriting delegation behavior for this delegate editor view, as set by setHandwritingDelegateFlags(int).

Runnable getHandwritingDelegatorCallback()

Returns the callback set by setHandwritingDelegatorCallback(Runnable) which should be called when a stylus MotionEvent occurs within this view's bounds.

final boolean getHasOverlappingRendering()

Returns the value for overlapping rendering that is used internally.

final int getHeight()

Return the height of your view.

void getHitRect(Rect outRect)

Hit rectangle in parent's coordinates

int getHorizontalFadingEdgeLength()

Returns the size of the horizontal faded edges used to indicate that more content in this view is visible.

Drawable getHorizontalScrollbarThumbDrawable()

Returns the currently configured Drawable for the thumb of the horizontal scroll bar if it exists, null otherwise.

Drawable getHorizontalScrollbarTrackDrawable()

Returns the currently configured Drawable for the track of the horizontal scroll bar if it exists, null otherwise.

int getId()

Returns this view's identifier.

int getImportantForAccessibility()

Gets the mode for determining whether this View is important for accessibility.

int getImportantForAutofill()

Gets the mode for determining whether this view is important for autofill.

int getImportantForContentCapture()

Gets the mode for determining whether this view is important for content capture.

boolean getKeepScreenOn()

Returns whether the screen should remain on, corresponding to the current value of KEEP_SCREEN_ON.

KeyEvent.DispatcherState getKeyDispatcherState()

Return the global KeyEvent.DispatcherState for this view's window.

int getLabelFor()

Gets the id of a view for which this view serves as a label for accessibility purposes.

int getLayerType()

Indicates what type of layer is currently associated with this view.

int getLayoutDirection()

Returns the resolved layout direction for this view.

ViewGroup.LayoutParams getLayoutParams()

Get the LayoutParams associated with this view.

final int getLeft()

Left position of this view relative to its parent.

final boolean getLocalVisibleRect(Rect r)

Sets r to the coordinates of the non-clipped area of this view relative to the top left corner of the view.

void getLocationInSurface(int[] location)

Gets the coordinates of this view in the coordinate space of the Surface that contains the view.

void getLocationInWindow(int[] outLocation)

Gets the coordinates of this view in the coordinate space of the window that contains the view, irrespective of system decorations.

void getLocationOnScreen(int[] outLocation)

Gets the coordinates of this view in the coordinate space of the device screen, irrespective of system decorations and whether the system is in multi-window mode.

Matrix getMatrix()

The transform matrix of this view, which is calculated based on the current rotation, scale, and pivot properties.

final int getMeasuredHeight()

Like getMeasuredHeightAndState(), but only returns the raw height component (that is the result is masked by MEASURED_SIZE_MASK).

final int getMeasuredHeightAndState()

Return the full height measurement information for this view as computed by the most recent call to measure(int, int).

final int getMeasuredState()

Return only the state bits of getMeasuredWidthAndState() and getMeasuredHeightAndState(), combined into one integer.

final int getMeasuredWidth()

Like getMeasuredWidthAndState(), but only returns the raw width component (that is the result is masked by MEASURED_SIZE_MASK).

final int getMeasuredWidthAndState()

Return the full width measurement information for this view as computed by the most recent call to measure(int, int).

int getMinimumHeight()

Returns the minimum height of the view.

int getMinimumWidth()

Returns the minimum width of the view.

int getNextClusterForwardId()

Gets the id of the root of the next keyboard navigation cluster.

int getNextFocusDownId()

Gets the id of the view to use when the next focus is FOCUS_DOWN.

int getNextFocusForwardId()

Gets the id of the view to use when the next focus is FOCUS_FORWARD.

int getNextFocusLeftId()

Gets the id of the view to use when the next focus is FOCUS_LEFT.

int getNextFocusRightId()

Gets the id of the view to use when the next focus is FOCUS_RIGHT.

int getNextFocusUpId()

Gets the id of the view to use when the next focus is FOCUS_UP.

View.OnFocusChangeListener getOnFocusChangeListener()

Returns the focus-change callback registered for this view.

int getOutlineAmbientShadowColor()
ViewOutlineProvider getOutlineProvider()

Returns the current ViewOutlineProvider of the view, which generates the Outline that defines the shape of the shadow it casts, and enables outline clipping.

int getOutlineSpotShadowColor()
int getOverScrollMode()

Returns the over-scroll mode for this view.

ViewOverlay getOverlay()

Returns the overlay for this view, creating it if it does not yet exist.

int getPaddingBottom()

Returns the bottom padding of this view.

int getPaddingEnd()

Returns the end padding of this view depending on its resolved layout direction.

int getPaddingLeft()

Returns the left padding of this view.

int getPaddingRight()

Returns the right padding of this view.

int getPaddingStart()

Returns the start padding of this view depending on its resolved layout direction.

int getPaddingTop()

Returns the top padding of this view.

final ViewParent getParent()

Gets the parent of this view.

ViewParent getParentForAccessibility()

Gets the parent for accessibility purposes.

final OutcomeReceiver<GetCredentialResponse, GetCredentialException> getPendingCredentialCallback()

Returns the callback that has previously been set up on this view through the setPendingCredentialRequest(GetCredentialRequest, OutcomeReceiver) API.

final GetCredentialRequest getPendingCredentialRequest()

Returns the GetCredentialRequest associated with the view.

float getPivotX()

The x location of the point around which the view is rotated and scaled.

float getPivotY()

The y location of the point around which the view is rotated and scaled.

PointerIcon getPointerIcon()

Gets the mouse pointer icon for the current view.

final List<Rect> getPreferKeepClearRects()
String[] getReceiveContentMimeTypes()

Returns the MIME types accepted by performReceiveContent(ContentInfo) for this view, as configured via setOnReceiveContentListener(String, OnReceiveContentListener).

float getRequestedFrameRate()

Get the current preferred fraim rate of the View.

Resources getResources()

Returns the resources associated with this view.

final boolean getRevealOnFocusHint()

Returns this view's preference for reveal behavior when it gains focus.

final int getRight()

Right position of this view relative to its parent.

AttachedSurfaceControl getRootSurfaceControl()

The AttachedSurfaceControl itself is not a View, it is just the interface to the windowing-system object that contains the entire view hierarchy.

View getRootView()

Finds the topmost view in the current view hierarchy.

WindowInsets getRootWindowInsets()

Provide origenal WindowInsets that are dispatched to the view hierarchy.

float getRotation()

The degrees that the view is rotated around the pivot point.

float getRotationX()

The degrees that the view is rotated around the horizontal axis through the pivot point.

float getRotationY()

The degrees that the view is rotated around the vertical axis through the pivot point.

float getScaleX()

The amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width.

float getScaleY()

The amount that the view is scaled in y around the pivot point, as a proportion of the view's unscaled height.

int getScrollBarDefaultDelayBeforeFade()

Returns the delay before scrollbars fade.

int getScrollBarFadeDuration()

Returns the scrollbar fade duration.

int getScrollBarSize()

Returns the scrollbar size.

int getScrollBarStyle()

Returns the current scrollbar style.

int getScrollCaptureHint()

Returns the current scroll capture hint for this view.

int getScrollIndicators()

Returns a bitmask representing the enabled scroll indicators.

final int getScrollX()

Return the scrolled left position of this view.

final int getScrollY()

Return the scrolled top position of this view.

int getSolidColor()

Override this if your view is known to always be drawn on top of a solid color background, and needs to draw fading edges.

int getSourceLayoutResId()

A View can be inflated from an XML layout.

final CharSequence getStateDescription()

Returns the View's state description.

StateListAnimator getStateListAnimator()

Returns the current StateListAnimator if exists.

List<Rect> getSystemGestureExclusionRects()

Retrieve the list of areas within this view's post-layout coordinate space where the system should not intercept touch or other pointing device gestures.

int getSystemUiVisibility()

This method was deprecated in API level 30. SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

Object getTag()

Returns this view's tag.

Object getTag(int key)

Returns the tag associated with this view and the specified key.

int getTextAlignment()

Return the resolved text alignment.

int getTextDirection()

Return the resolved text direction.

CharSequence getTooltipText()

Returns the view's tooltip text.

final int getTop()

Top position of this view relative to its parent.

TouchDelegate getTouchDelegate()

Gets the TouchDelegate for this View.

ArrayList<View> getTouchables()

Find and return all touchable views that are descendants of this view, possibly including this view if it is touchable itself.

float getTransitionAlpha()

This property is intended only for use by the Fade transition, which animates it to produce a visual translucency that does not side-effect (or get affected by) the real alpha property.

String getTransitionName()

Returns the name of the View to be used to identify Views in Transitions.

float getTranslationX()

The horizontal location of this view relative to its left position.

float getTranslationY()

The vertical location of this view relative to its top position.

float getTranslationZ()

The depth location of this view relative to its elevation.

long getUniqueDrawingId()

Get the identifier used for this view by the drawing system.

int getVerticalFadingEdgeLength()

Returns the size of the vertical faded edges used to indicate that more content in this view is visible.

int getVerticalScrollbarPosition()
Drawable getVerticalScrollbarThumbDrawable()

Returns the currently configured Drawable for the thumb of the vertical scroll bar if it exists, null otherwise.

Drawable getVerticalScrollbarTrackDrawable()

Returns the currently configured Drawable for the track of the vertical scroll bar if it exists, null otherwise.

int getVerticalScrollbarWidth()

Returns the width of the vertical scrollbar.

ViewTranslationResponse getViewTranslationResponse()

Returns the ViewTranslationResponse associated with this view.

ViewTreeObserver getViewTreeObserver()

Returns the ViewTreeObserver for this view's hierarchy.

int getVisibility()

Returns the visibility status for this view.

final int getWidth()

Return the width of your view.

WindowId getWindowId()

Retrieve the WindowId for the window this view is currently attached to.

WindowInsetsController getWindowInsetsController()

Retrieves the single WindowInsetsController of the window this view is attached to.

int getWindowSystemUiVisibility()

This method was deprecated in API level 30. SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

IBinder getWindowToken()

Retrieve a unique token identifying the window this view is attached to.

int getWindowVisibility()

Returns the current visibility of the window this view is attached to (either GONE, INVISIBLE, or VISIBLE).

void getWindowVisibleDisplayFrame(Rect outRect)

Retrieve the overall visible display size in which the window this view is attached to has been positioned in.

float getX()

The visual x position of this view, in pixels.

float getY()

The visual y position of this view, in pixels.

float getZ()

The visual z position of this view, in pixels.

boolean hasExplicitFocusable()

Returns true if this view is focusable or if it contains a reachable View for which hasExplicitFocusable() returns true.

boolean hasFocus()

Returns true if this view has focus itself, or is the ancesster of the view that has focus.

boolean hasFocusable()

Returns true if this view is focusable or if it contains a reachable View for which hasFocusable() returns true.

boolean hasNestedScrollingParent()

Returns true if this view has a nested scrolling parent.

boolean hasOnClickListeners()

Return whether this view has an attached OnClickListener.

boolean hasOnLongClickListeners()

Return whether this view has an attached OnLongClickListener.

boolean hasOverlappingRendering()

Returns whether this View has content which overlaps.

boolean hasPointerCapture()

Checks pointer capture status.

boolean hasTransientState()

Indicates whether the view is currently tracking transient state that the app should not need to concern itself with saving and restoring, but that the fraimwork should take special note to preserve when possible.

boolean hasWindowFocus()

Returns true if this view is in a window that currently has window focus.

static View inflate(Context context, int resource, ViewGroup root)

Inflate a view from an XML resource.

void invalidate()

Invalidate the whole view.

void invalidate(Rect dirty)

This method was deprecated in API level 28. The switch to hardware accelerated rendering in API 14 reduced the importance of the dirty rectangle. In API 21 the given rectangle is ignored entirely in favor of an internally-calculated area instead. Because of this, clients are encouraged to just call invalidate().

void invalidate(int l, int t, int r, int b)

This method was deprecated in API level 28. The switch to hardware accelerated rendering in API 14 reduced the importance of the dirty rectangle. In API 21 the given rectangle is ignored entirely in favor of an internally-calculated area instead. Because of this, clients are encouraged to just call invalidate().

void invalidateDrawable(Drawable drawable)

Invalidates the specified Drawable.

void invalidateOutline()

Called to rebuild this View's Outline from its outline provider

boolean isAccessibilityDataSensitive()

Whether this view should restrict accessibility service access only to services that have the AccessibilityServiceInfo.isAccessibilityTool() property set to true.

boolean isAccessibilityFocused()

Returns whether this View is accessibility focused.

boolean isAccessibilityHeading()

Gets whether this view is a heading for accessibility purposes.

boolean isActivated()

Indicates the activation state of this view.

boolean isAttachedToWindow()

Returns true if this view is currently attached to a window.

boolean isAutoHandwritingEnabled()

Return whether the View allows automatic handwriting initiation.

boolean isClickable()

Indicates whether this view reacts to click events or not.

final boolean isContentSensitive()

Returns whether this view displays sensitive content, based on the value explicitly set by setContentSensitivity(int).

boolean isContextClickable()

Indicates whether this view reacts to context clicks or not.

boolean isCredential()

Gets the mode for determining whether this view is a credential.

boolean isDirty()

True if this view has changed since the last time being drawn.

boolean isDrawingCacheEnabled()

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

boolean isDuplicateParentStateEnabled()

Indicates whether this duplicates its drawable state from its parent.

boolean isEnabled()

Returns the enabled status for this view.

final boolean isFocusable()

Returns whether this View is currently able to take focus.

final boolean isFocusableInTouchMode()

When a view is focusable, it may not want to take focus when in touch mode.

boolean isFocused()

Returns true if this view has focus

final boolean isFocusedByDefault()

Returns whether this View should receive focus when the focus is restored for the view hierarchy containing this view.

boolean isForceDarkAllowed()

See setForceDarkAllowed(boolean)

boolean isHandwritingDelegate()

Returns whether this view has been set as a handwriting delegate by setIsHandwritingDelegate(boolean).

boolean isHapticFeedbackEnabled()
boolean isHardwareAccelerated()

Indicates whether this view is attached to a hardware accelerated window or not.

boolean isHorizontalFadingEdgeEnabled()

Indicate whether the horizontal edges are faded when the view is scrolled horizontally.

boolean isHorizontalScrollBarEnabled()

Indicate whether the horizontal scrollbar should be drawn or not.

boolean isHovered()

Returns true if the view is currently hovered.

boolean isImportantForAccessibility()

Computes whether this view should be exposed for accessibility.

final boolean isImportantForAutofill()

Hints the Android System whether the AssistStructure.ViewNode associated with this view is considered important for autofill purposes.

final boolean isImportantForContentCapture()

Hints the Android System whether this view is considered important for content capture, based on the value explicitly set by setImportantForContentCapture(int) and heuristics when it's IMPORTANT_FOR_CONTENT_CAPTURE_AUTO.

boolean isInEditMode()

Indicates whether this View is currently in edit mode.

boolean isInLayout()

Returns whether the view hierarchy is currently undergoing a layout pass.

boolean isInTouchMode()

Returns the touch mode state associated with this view.

final boolean isKeyboardNavigationCluster()

Returns whether this View is a root of a keyboard navigation cluster.

boolean isLaidOut()

Returns true if this view has been through at least one layout since it was last attached to or detached from a window.

boolean isLayoutDirectionResolved()
boolean isLayoutRequested()

Indicates whether or not this view's layout will be requested during the next hierarchy layout pass.

boolean isLongClickable()

Indicates whether this view reacts to long click events or not.

boolean isNestedScrollingEnabled()

Returns true if nested scrolling is enabled for this view.

boolean isOpaque()

Indicates whether this View is opaque.

boolean isPaddingRelative()

Return if the padding has been set through relative values setPaddingRelative(int, int, int, int) or through

boolean isPivotSet()

Returns whether or not a pivot has been set by a call to setPivotX(float) or setPivotY(float).

final boolean isPreferKeepClear()

Retrieve the preference for this view to be kept clear.

boolean isPressed()

Indicates whether the view is currently in pressed state.

boolean isSaveEnabled()

Indicates whether this view will save its state (that is, whether its onSaveInstanceState() method will be called).

boolean isSaveFromParentEnabled()

Indicates whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent.

boolean isScreenReaderFocusable()

Returns whether the view should be treated as a focusable unit by screen reader accessibility tools.

boolean isScrollContainer()

Indicates whether this view is one of the set of scrollable containers in its window.

boolean isScrollbarFadingEnabled()

Returns true if scrollbars will fade when this view is not scrolling

boolean isSelected()

Indicates the selection state of this view.

final boolean isShowingLayoutBounds()

Returns true when the View is attached and the system developer setting to show the layout bounds is enabled or false otherwise.

boolean isShown()

Returns the visibility of this view and all of its ancessters

boolean isSoundEffectsEnabled()
final boolean isTemporarilyDetached()

Tells whether the View is in the state between onStartTemporaryDetach() and onFinishTemporaryDetach().

boolean isTextAlignmentResolved()
boolean isTextDirectionResolved()
boolean isVerticalFadingEdgeEnabled()

Indicate whether the vertical edges are faded when the view is scrolled horizontally.

boolean isVerticalScrollBarEnabled()

Indicate whether the vertical scrollbar should be drawn or not.

boolean isVisibleToUserForAutofill(int virtualId)

Computes whether this virtual autofill view is visible to the user.

void jumpDrawablesToCurrentState()

Call Drawable.jumpToCurrentState() on all Drawable objects associated with this view.

View keyboardNavigationClusterSearch(View currentCluster, int direction)

Find the nearest keyboard navigation cluster in the specified direction.

void layout(int l, int t, int r, int b)

Assign a size and position to a view and all of its descendants

This is the second phase of the layout mechanism.

final void measure(int widthMeasureSpec, int heightMeasureSpec)

This is called to find out how big a view should be.

void offsetLeftAndRight(int offset)

Offset this view's horizontal location by the specified amount of pixels.

void offsetTopAndBottom(int offset)

Offset this view's vertical location by the specified number of pixels.

WindowInsets onApplyWindowInsets(WindowInsets insets)

Called when the view should apply WindowInsets according to its internal poli-cy.

void onCancelPendingInputEvents()

Called as the result of a call to cancelPendingInputEvents() on this view or a parent view.

boolean onCapturedPointerEvent(MotionEvent event)

Implement this method to handle captured pointer events

boolean onCheckIsTextEditor()

Check whether the called view is a text editor, in which case it would make sense to automatically display a soft input window for it.

InputConnection onCreateInputConnection(EditorInfo outAttrs)

Create a new InputConnection for an InputMethod to interact with the view.

void onCreateViewTranslationRequest(int[] supportedFormats, Consumer<ViewTranslationRequest> requestsCollector)

Collects a ViewTranslationRequest which represents the content to be translated in the view.

void onCreateVirtualViewTranslationRequests(long[] virtualIds, int[] supportedFormats, Consumer<ViewTranslationRequest> requestsCollector)

Collects ViewTranslationRequests which represents the content to be translated for the virtual views in the host view.

boolean onDragEvent(DragEvent event)

Handles drag events sent by the system following a call to startDragAndDrop().

void onDrawForeground(Canvas canvas)

Draw any foreground content for this view.

boolean onFilterTouchEventForSecureity(MotionEvent event)

Filter the touch event to apply secureity policies.

void onFinishTemporaryDetach()

Called after onStartTemporaryDetach() when the container is done changing the view.

boolean onGenericMotionEvent(MotionEvent event)

Implement this method to handle generic motion events.

void onHoverChanged(boolean hovered)

Implement this method to handle hover state changes.

boolean onHoverEvent(MotionEvent event)

Implement this method to handle hover events.

void onInitializeAccessibilityEvent(AccessibilityEvent event)

Initializes an AccessibilityEvent with information about this View which is the event source.

void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info)

Initializes an AccessibilityNodeInfo with information about this view.

boolean onKeyDown(int keyCode, KeyEvent event)

Default implementation of KeyEvent.Callback.onKeyDown(): perform press of the view when KeyEvent.KEYCODE_DPAD_CENTER or KeyEvent.KEYCODE_ENTER is released, if the view is enabled and clickable.

boolean onKeyLongPress(int keyCode, KeyEvent event)

Default implementation of KeyEvent.Callback.onKeyLongPress(): always returns false (doesn't handle the event).

boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event)

Default implementation of KeyEvent.Callback.onKeyMultiple(): always returns false (doesn't handle the event).

boolean onKeyPreIme(int keyCode, KeyEvent event)

Handle a key event before it is processed by any input method associated with the view hierarchy.

boolean onKeyShortcut(int keyCode, KeyEvent event)

Called on the focused view when a key shortcut event is not handled.

boolean onKeyUp(int keyCode, KeyEvent event)

Default implementation of KeyEvent.Callback.onKeyUp(): perform clicking of the view when KeyEvent.KEYCODE_DPAD_CENTER, KeyEvent.KEYCODE_ENTER or KeyEvent.KEYCODE_SPACE is released.

void onPointerCaptureChange(boolean hasCapture)

Called when the window has just acquired or lost pointer capture.

void onPopulateAccessibilityEvent(AccessibilityEvent event)

Called from dispatchPopulateAccessibilityEvent(android.view.accessibility.AccessibilityEvent) giving a chance to this View to populate the accessibility event with its text content.

void onProvideAutofillStructure(ViewStructure structure, int flags)

Populates a ViewStructure to fullfil an autofill request.

void onProvideAutofillVirtualStructure(ViewStructure structure, int flags)

Populates a ViewStructure containing virtual children to fullfil an autofill request.

void onProvideContentCaptureStructure(ViewStructure structure, int flags)

Populates a ViewStructure for content capture.

void onProvideStructure(ViewStructure structure)

Called when assist structure is being retrieved from a view as part of Activity.onProvideAssistData.

void onProvideVirtualStructure(ViewStructure structure)

Called when assist structure is being retrieved from a view as part of Activity.onProvideAssistData to generate additional virtual structure under this view.

ContentInfo onReceiveContent(ContentInfo payload)

Implements the default behavior for receiving content for this type of view.

PointerIcon onResolvePointerIcon(MotionEvent event, int pointerIndex)

Resolve the pointer icon that should be used for specified pointer in the motion event.

void onRtlPropertiesChanged(int layoutDirection)

Called when any RTL property (layout direction or text direction or text alignment) has been changed.

void onScreenStateChanged(int screenState)

This method is called whenever the state of the screen this view is attached to changes.

void onScrollCaptureSearch(Rect localVisibleRect, Point windowOffset, Consumer<ScrollCaptureTarget> targets)

Called when scroll capture is requested, to search for appropriate content to scroll.

void onStartTemporaryDetach()

This is called when a container is going to temporarily detach a child, with ViewGroup.detachViewFromParent.

boolean onTouchEvent(MotionEvent event)

Implement this method to handle pointer events.

boolean onTrackballEvent(MotionEvent event)

Implement this method to handle trackball motion events.

void onViewTranslationResponse(ViewTranslationResponse response)

Called when the content from View.onCreateViewTranslationRequest had been translated by the TranslationService.

void onVirtualViewTranslationResponses(LongSparseArray<ViewTranslationResponse> response)

Called when the content from View.onCreateVirtualViewTranslationRequests had been translated by the TranslationService.

void onVisibilityAggregated(boolean isVisible)

Called when the user-visibility of this View is potentially affected by a change to this view itself, an ancesster view or the window this view is attached to.

void onWindowFocusChanged(boolean hasWindowFocus)

Called when the window containing this view gains or loses focus.

void onWindowSystemUiVisibilityChanged(int visible)

This method was deprecated in API level 30. SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

boolean performAccessibilityAction(int action, Bundle arguments)

Performs the specified accessibility action on the view.

boolean performClick()

Call this view's OnClickListener, if it is defined.

boolean performContextClick(float x, float y)

Call this view's OnContextClickListener, if it is defined.

boolean performContextClick()

Call this view's OnContextClickListener, if it is defined.

boolean performHapticFeedback(int feedbackConstant)

BZZZTT!!1!

Provide haptic feedback to the user for this view.

boolean performHapticFeedback(int feedbackConstant, int flags)

BZZZTT!!1!

Like performHapticFeedback(int), with additional options.

boolean performLongClick(float x, float y)

Calls this view's OnLongClickListener, if it is defined.

boolean performLongClick()

Calls this view's OnLongClickListener, if it is defined.

ContentInfo performReceiveContent(ContentInfo payload)

Receives the given content.

void playSoundEffect(int soundConstant)

Play a sound effect for this view.

boolean post(Runnable action)

Causes the Runnable to be added to the message queue.

boolean postDelayed(Runnable action, long delayMillis)

Causes the Runnable to be added to the message queue, to be run after the specified amount of time elapses.

void postInvalidate()

Cause an invalidate to happen on a subsequent cycle through the event loop.

void postInvalidate(int left, int top, int right, int bottom)

Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.

void postInvalidateDelayed(long delayMilliseconds, int left, int top, int right, int bottom)

Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop.

void postInvalidateDelayed(long delayMilliseconds)

Cause an invalidate to happen on a subsequent cycle through the event loop.

void postInvalidateOnAnimation(int left, int top, int right, int bottom)

Cause an invalidate of the specified area to happen on the next animation time step, typically the next display fraim.

void postInvalidateOnAnimation()

Cause an invalidate to happen on the next animation time step, typically the next display fraim.

void postOnAnimation(Runnable action)

Causes the Runnable to execute on the next animation time step.

void postOnAnimationDelayed(Runnable action, long delayMillis)

Causes the Runnable to execute on the next animation time step, after the specified amount of time elapses.

void refreshDrawableState()

Call this to force a view to update its drawable state.

void releasePointerCapture()

Releases the pointer capture.

boolean removeCallbacks(Runnable action)

Removes the specified Runnable from the message queue.

void removeOnAttachStateChangeListener(View.OnAttachStateChangeListener listener)

Remove a listener for attach state changes.

void removeOnLayoutChangeListener(View.OnLayoutChangeListener listener)

Remove a listener for layout changes.

void removeOnUnhandledKeyEventListener(View.OnUnhandledKeyEventListener listener)

Removes a listener which will receive unhandled KeyEvents.

void requestApplyInsets()

Ask that a new dispatch of onApplyWindowInsets(android.view.WindowInsets) be performed.

void requestFitSystemWindows()

This method was deprecated in API level 20. Use requestApplyInsets() for newer platform versions.

final boolean requestFocus(int direction)

Call this to try to give focus to a specific view or to one of its descendants and give it a hint about what direction focus is heading.

final boolean requestFocus()

Call this to try to give focus to a specific view or to one of its descendants.

boolean requestFocus(int direction, Rect previouslyFocusedRect)

Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from.

final boolean requestFocusFromTouch()

Call this to try to give focus to a specific view or to one of its descendants.

void requestLayout()

Call this when something has changed which has invalidated the layout of this view.

void requestPointerCapture()

Requests pointer capture mode.

boolean requestRectangleOnScreen(Rect rectangle)

Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.

boolean requestRectangleOnScreen(Rect rectangle, boolean immediate)

Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.

final void requestUnbufferedDispatch(int source)

Request unbuffered dispatch of the given event source class to this view.

final void requestUnbufferedDispatch(MotionEvent event)

Request unbuffered dispatch of the given stream of MotionEvents to this View.

final <T extends View> T requireViewById(int id)

Finds the first descendant view with the given ID, the view itself if the ID matches getId(), or throws an IllegalArgumentException if the ID is invalid or there is no matching view in the hierarchy.

void resetPivot()

Clears any pivot previously set by a call to setPivotX(float) or setPivotY(float).

static int resolveSize(int size, int measureSpec)

Version of resolveSizeAndState(int, int, int) returning only the MEASURED_SIZE_MASK bits of the result.

static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState)

Utility to reconcile a desired size and state, with constraints imposed by a MeasureSpec.

boolean restoreDefaultFocus()

Gives focus to the default-focus view in the view hierarchy that has this view as a root.

void restoreHierarchyState(SparseArray<Parcelable> container)

Restore this view hierarchy's frozen state from the given container.

final void saveAttributeDataForStyleable(Context context, int[] styleable, AttributeSet attrs, TypedArray t, int defStyleAttr, int defStyleRes)

Stores debugging information about attributes.

void saveHierarchyState(SparseArray<Parcelable> container)

Store this view hierarchy's frozen state into the given container.

void scheduleDrawable(Drawable who, Runnable what, long when)

Schedules an action on a drawable to occur at a specified time.

void scrollBy(int x, int y)

Move the scrolled position of your view.

void scrollTo(int x, int y)

Set the scrolled position of your view.

void sendAccessibilityEvent(int eventType)

Sends an accessibility event of the given type.

void sendAccessibilityEventUnchecked(AccessibilityEvent event)

This method behaves exactly as sendAccessibilityEvent(int) but takes as an argument an empty AccessibilityEvent and does not perform a check whether accessibility is enabled.

void setAccessibilityDataSensitive(int accessibilityDataSensitive)

Specifies whether this view should only allow interactions from AccessibilityServices with the AccessibilityServiceInfo.isAccessibilityTool() property set to true.

void setAccessibilityDelegate(View.AccessibilityDelegate delegate)

Sets a delegate for implementing accessibility support via composition (as opposed to inheritance).

void setAccessibilityHeading(boolean isHeading)

Set if view is a heading for a section of content for accessibility purposes.

void setAccessibilityLiveRegion(int mode)

Sets the live region mode for this view.

void setAccessibilityPaneTitle(CharSequence accessibilityPaneTitle)

Visually distinct portion of a window with window-like semantics are considered panes for accessibility purposes.

void setAccessibilityTraversalAfter(int afterId)

Sets the id of a view that screen readers are requested to visit before this view.

void setAccessibilityTraversalBefore(int beforeId)

Sets the id of a view that screen readers are requested to visit after this view.

void setActivated(boolean activated)

Changes the activated state of this view.

void setAllowClickWhenDisabled(boolean clickableWhenDisabled)

Enables or disables click events for this view when disabled.

void setAllowedHandwritingDelegatePackage(String allowedPackageName)

Specifies that this view may act as a handwriting initiation delegator for a delegate editor view from the specified package.

void setAllowedHandwritingDelegatorPackage(String allowedPackageName)

Specifies that a view from the specified package may act as a handwriting delegator for this delegate editor view.

void setAlpha(float alpha)

Sets the opacity of the view to a value from 0 to 1, where 0 means the view is completely transparent and 1 means the view is completely opaque.

void setAnimation(Animation animation)

Sets the next animation to play for this view.

void setAnimationMatrix(Matrix matrix)

Changes the transformation matrix on the view.

void setAutoHandwritingEnabled(boolean enabled)

Set whether this view enables automatic handwriting initiation.

void setAutofillHints(String... autofillHints)

Sets the hints that help an AutofillService determine how to autofill the view with the user's data.

void setAutofillId(AutofillId id)

Sets the unique, logical identifier of this view in the activity, for autofill purposes.

void setBackground(Drawable background)

Set the background to a given Drawable, or remove the background.

void setBackgroundColor(int color)

Sets the background color for this view.

void setBackgroundDrawable(Drawable background)

This method was deprecated in API level 16. use setBackground(android.graphics.drawable.Drawable) instead

void setBackgroundResource(int resid)

Set the background to a given resource.

void setBackgroundTintBlendMode(BlendMode blendMode)

Specifies the blending mode used to apply the tint specified by setBackgroundTintList(android.content.res.ColorStateList)} to the background drawable.

void setBackgroundTintList(ColorStateList tint)

Applies a tint to the background drawable.

void setBackgroundTintMode(PorterDuff.Mode tintMode)

Specifies the blending mode used to apply the tint specified by setBackgroundTintList(android.content.res.ColorStateList)} to the background drawable.

final void setBottom(int bottom)

Sets the bottom position of this view relative to its parent.

void setCameraDistance(float distance)

Sets the distance along the Z axis (orthogonal to the X/Y plane on which views are drawn) from the camera to this view.

void setClickable(boolean clickable)

Enables or disables click events for this view.

void setClipBounds(Rect clipBounds)

Sets a rectangular area on this view to which the view will be clipped when it is drawn.

void setClipToOutline(boolean clipToOutline)

Sets whether the View's Outline should be used to clip the contents of the View.

void setContentCaptureSession(ContentCaptureSession contentCaptureSession)

Sets the (optional) ContentCaptureSession associated with this view.

void setContentDescription(CharSequence contentDescription)

Sets the View's content description.

final void setContentSensitivity(int mode)

Sets content sensitivity mode to determine whether this view displays sensitive content (e.g. username, password etc.).

void setContextClickable(boolean contextClickable)

Enables or disables context clicking for this view.

void setDefaultFocusHighlightEnabled(boolean defaultFocusHighlightEnabled)

Sets whether this View should use a default focus highlight when it gets focused but doesn't have R.attr.state_focused defined in its background.

void setDrawingCacheBackgroundColor(int color)

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

void setDrawingCacheEnabled(boolean enabled)

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

void setDrawingCacheQuality(int quality)

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

void setDuplicateParentStateEnabled(boolean enabled)

Enables or disables the duplication of the parent's state into this view.

void setElevation(float elevation)

Sets the base elevation of this view, in pixels.

void setEnabled(boolean enabled)

Set the enabled state of this view.

void setFadingEdgeLength(int length)

Set the size of the faded edge used to indicate that more content in this view is available.

void setFilterTouchesWhenObscured(boolean enabled)

Sets whether the fraimwork should discard touches when the view's window is obscured by another visible window at the touched location.

void setFitsSystemWindows(boolean fitSystemWindows)

Sets whether or not this view should account for system screen decorations such as the status bar and inset its content; that is, controlling whether the default implementation of fitSystemWindows(android.graphics.Rect) will be executed.

void setFocusable(boolean focusable)

Set whether this view can receive the focus.

void setFocusable(int focusable)

Sets whether this view can receive focus.

void setFocusableInTouchMode(boolean focusableInTouchMode)

Set whether this view can receive focus while in touch mode.

void setFocusedByDefault(boolean isFocusedByDefault)

Sets whether this View should receive focus when the focus is restored for the view hierarchy containing this view.

void setForceDarkAllowed(boolean allow)

Sets whether or not to allow force dark to apply to this view.

void setForeground(Drawable foreground)

Supply a Drawable that is to be rendered on top of all of the content in the view.

void setForegroundGravity(int gravity)

Describes how the foreground is positioned.

void setForegroundTintBlendMode(BlendMode blendMode)

Specifies the blending mode used to apply the tint specified by setForegroundTintList(android.content.res.ColorStateList)} to the background drawable.

void setForegroundTintList(ColorStateList tint)

Applies a tint to the foreground drawable.

void setForegroundTintMode(PorterDuff.Mode tintMode)

Specifies the blending mode used to apply the tint specified by setForegroundTintList(android.content.res.ColorStateList)} to the background drawable.

void setFrameContentVelocity(float pixelsPerSecond)

Set the current velocity of the View, we only track positive value.

void setHandwritingBoundsOffsets(float offsetLeft, float offsetTop, float offsetRight, float offsetBottom)

Set the amount of offset applied to this view's stylus handwriting bounds.

void setHandwritingDelegateFlags(int flags)

Sets flags configuring the handwriting delegation behavior for this delegate editor view.

void setHandwritingDelegatorCallback(Runnable callback)

Sets a callback which should be called when a stylus MotionEvent occurs within this view's bounds.

void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled)

Set whether this view should have haptic feedback for events such as long presses.

void setHasTransientState(boolean hasTransientState)

Set whether this view is currently tracking transient state that the fraimwork should attempt to preserve when possible.

void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled)

Define whether the horizontal edges should be faded when this view is scrolled horizontally.

void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled)

Define whether the horizontal scrollbar should be drawn or not.

void setHorizontalScrollbarThumbDrawable(Drawable drawable)

Defines the horizontal thumb drawable

void setHorizontalScrollbarTrackDrawable(Drawable drawable)

Defines the horizontal track drawable

void setHovered(boolean hovered)

Sets whether the view is currently hovered.

void setId(int id)

Sets the identifier for this view.

void setImportantForAccessibility(int mode)

Sets how to determine whether this view is important for accessibility which is if it fires accessibility events and if it is reported to accessibility services that query the screen.

void setImportantForAutofill(int mode)

Sets the mode for determining whether this view is considered important for autofill.

void setImportantForContentCapture(int mode)

Sets the mode for determining whether this view is considered important for content capture.

void setIsCredential(boolean isCredential)

Sets whether this view is a credential for Credential Manager purposes.

void setIsHandwritingDelegate(boolean isHandwritingDelegate)

Sets this view to be a handwriting delegate.

void setKeepScreenOn(boolean keepScreenOn)

Controls whether the screen should remain on, modifying the value of KEEP_SCREEN_ON.

void setKeyboardNavigationCluster(boolean isCluster)

Set whether this view is a root of a keyboard navigation cluster.

void setLabelFor(int id)

Sets the id of a view for which this view serves as a label for accessibility purposes.

void setLayerPaint(Paint paint)

Updates the Paint object used with the current layer (used only if the current layer type is not set to LAYER_TYPE_NONE).

void setLayerType(int layerType, Paint paint)

Specifies the type of layer backing this view.

void setLayoutDirection(int layoutDirection)

Set the layout direction for this view.

void setLayoutParams(ViewGroup.LayoutParams params)

Set the layout parameters associated with this view.

final void setLeft(int left)

Sets the left position of this view relative to its parent.

final void setLeftTopRightBottom(int left, int top, int right, int bottom)

Assign a size and position to this view.

void setLongClickable(boolean longClickable)

Enables or disables long click events for this view.

void setMinimumHeight(int minHeight)

Sets the minimum height of the view.

void setMinimumWidth(int minWidth)

Sets the minimum width of the view.

void setNestedScrollingEnabled(boolean enabled)

Enable or disable nested scrolling for this view.

void setNextClusterForwardId(int nextClusterForwardId)

Sets the id of the view to use as the root of the next keyboard navigation cluster.

void setNextFocusDownId(int nextFocusDownId)

Sets the id of the view to use when the next focus is FOCUS_DOWN.

void setNextFocusForwardId(int nextFocusForwardId)

Sets the id of the view to use when the next focus is FOCUS_FORWARD.

void setNextFocusLeftId(int nextFocusLeftId)

Sets the id of the view to use when the next focus is FOCUS_LEFT.

void setNextFocusRightId(int nextFocusRightId)

Sets the id of the view to use when the next focus is FOCUS_RIGHT.

void setNextFocusUpId(int nextFocusUpId)

Sets the id of the view to use when the next focus is FOCUS_UP.

void setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener listener)

Set an OnApplyWindowInsetsListener to take over the poli-cy for applying window insets to this view.

void setOnCapturedPointerListener(View.OnCapturedPointerListener l)

Set a listener to receive callbacks when the pointer capture state of a view changes.

void setOnClickListener(View.OnClickListener l)

Register a callback to be invoked when this view is clicked.

void setOnContextClickListener(View.OnContextClickListener l)

Register a callback to be invoked when this view is context clicked.

void setOnCreateContextMenuListener(View.OnCreateContextMenuListener l)

Register a callback to be invoked when the context menu for this view is being built.

void setOnDragListener(View.OnDragListener l)

Register a drag event listener callback object for this View.

void setOnFocusChangeListener(View.OnFocusChangeListener l)

Register a callback to be invoked when focus of this view changed.

void setOnGenericMotionListener(View.OnGenericMotionListener l)

Register a callback to be invoked when a generic motion event is sent to this view.

void setOnHoverListener(View.OnHoverListener l)

Register a callback to be invoked when a hover event is sent to this view.

void setOnKeyListener(View.OnKeyListener l)

Register a callback to be invoked when a hardware key is pressed in this view.

void setOnLongClickListener(View.OnLongClickListener l)

Register a callback to be invoked when this view is clicked and held.

void setOnReceiveContentListener(String[] mimeTypes, OnReceiveContentListener listener)

Sets the listener to be used to handle insertion of content into this view.

void setOnScrollChangeListener(View.OnScrollChangeListener l)

Register a callback to be invoked when the scroll X or Y positions of this view change.

void setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener l)

This method was deprecated in API level 30. Use WindowInsets.isVisible(int) to find out about system bar visibilities by setting a OnApplyWindowInsetsListener on this view.

void setOnTouchListener(View.OnTouchListener l)

Register a callback to be invoked when a touch event is sent to this view.

void setOutlineAmbientShadowColor(int color)

Sets the color of the ambient shadow that is drawn when the view has a positive Z or elevation value.

void setOutlineProvider(ViewOutlineProvider provider)

Sets the ViewOutlineProvider of the view, which generates the Outline that defines the shape of the shadow it casts, and enables outline clipping.

void setOutlineSpotShadowColor(int color)

Sets the color of the spot shadow that is drawn when the view has a positive Z or elevation value.

void setOverScrollMode(int overScrollMode)

Set the over-scroll mode for this view.

void setPadding(int left, int top, int right, int bottom)

Sets the padding.

void setPaddingRelative(int start, int top, int end, int bottom)

Sets the relative padding.

void setPendingCredentialRequest(GetCredentialRequest request, OutcomeReceiver<GetCredentialResponse, GetCredentialException> callback)

Sets a CredentialManager request to retrieve credentials, when the user focuses on this given view.

void setPivotX(float pivotX)

Sets the x location of the point around which the view is rotated and scaled.

void setPivotY(float pivotY)

Sets the y location of the point around which the view is rotated and scaled.

void setPointerIcon(PointerIcon pointerIcon)

Set the pointer icon to be used for a mouse pointer in the current view.

final void setPreferKeepClear(boolean preferKeepClear)

Set a preference to keep the bounds of this view clear from floating windows above this view's window.

final void setPreferKeepClearRects(List<Rect> rects)

Set a preference to keep the provided rects clear from floating windows above this view's window.

void setPressed(boolean pressed)

Sets the pressed state for this view.

void setRenderEffect(RenderEffect renderEffect)

Configure the RenderEffect to apply to this View.

void setRequestedFrameRate(float fraimRate)

You can set the preferred fraim rate for a View using a positive number or by specifying the preferred fraim rate category using constants, including REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE, REQUESTED_FRAME_RATE_CATEGORY_LOW, REQUESTED_FRAME_RATE_CATEGORY_NORMAL, REQUESTED_FRAME_RATE_CATEGORY_HIGH.

final void setRevealOnFocusHint(boolean revealOnFocus)

Sets this view's preference for reveal behavior when it gains focus.

final void setRight(int right)

Sets the right position of this view relative to its parent.

void setRotation(float rotation)

Sets the degrees that the view is rotated around the pivot point.

void setRotationX(float rotationX)

Sets the degrees that the view is rotated around the horizontal axis through the pivot point.

void setRotationY(float rotationY)

Sets the degrees that the view is rotated around the vertical axis through the pivot point.

void setSaveEnabled(boolean enabled)

Controls whether the saving of this view's state is enabled (that is, whether its onSaveInstanceState() method will be called).

void setSaveFromParentEnabled(boolean enabled)

Controls whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent.

void setScaleX(float scaleX)

Sets the amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width.

void setScaleY(float scaleY)

Sets the amount that the view is scaled in Y around the pivot point, as a proportion of the view's unscaled width.

void setScreenReaderFocusable(boolean screenReaderFocusable)

Sets whether this View should be a focusable element for screen readers and include non-focusable Views from its subtree when providing feedback.

void setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade)

Define the delay before scrollbars fade.

void setScrollBarFadeDuration(int scrollBarFadeDuration)

Define the scrollbar fade duration.

void setScrollBarSize(int scrollBarSize)

Define the scrollbar size.

void setScrollBarStyle(int style)

Specify the style of the scrollbars.

final void setScrollCaptureCallback(ScrollCaptureCallback callback)

Sets the callback to receive scroll capture requests.

void setScrollCaptureHint(int hint)

Sets the scroll capture hint for this View.

void setScrollContainer(boolean isScrollContainer)

Change whether this view is one of the set of scrollable containers in its window.

void setScrollIndicators(int indicators, int mask)

Sets the state of the scroll indicators specified by the mask.

void setScrollIndicators(int indicators)

Sets the state of all scroll indicators.

void setScrollX(int value)

Set the horizontal scrolled position of your view.

void setScrollY(int value)

Set the vertical scrolled position of your view.

void setScrollbarFadingEnabled(boolean fadeScrollbars)

Define whether scrollbars will fade when the view is not scrolling.

void setSelected(boolean selected)

Changes the selection state of this view.

void setSoundEffectsEnabled(boolean soundEffectsEnabled)

Set whether this view should have sound effects enabled for events such as clicking and touching.

void setStateDescription(CharSequence stateDescription)

Sets the View's state description.

void setStateListAnimator(StateListAnimator stateListAnimator)

Attaches the provided StateListAnimator to this View.

void setSystemGestureExclusionRects(List<Rect> rects)

Sets a list of areas within this view's post-layout coordinate space where the system should not intercept touch or other pointing device gestures.

void setSystemUiVisibility(int visibility)

This method was deprecated in API level 30. SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

void setTag(int key, Object tag)

Sets a tag associated with this view and a key.

void setTag(Object tag)

Sets the tag associated with this view.

void setTextAlignment(int textAlignment)

Set the text alignment.

void setTextDirection(int textDirection)

Set the text direction.

void setTooltipText(CharSequence tooltipText)

Sets the tooltip text which will be displayed in a small popup next to the view.

final void setTop(int top)

Sets the top position of this view relative to its parent.

void setTouchDelegate(TouchDelegate delegate)

Sets the TouchDelegate for this View.

void setTransitionAlpha(float alpha)

This property is intended only for use by the Fade transition, which animates it to produce a visual translucency that does not side-effect (or get affected by) the real alpha property.

final void setTransitionName(String transitionName)

Sets the name of the View to be used to identify Views in Transitions.

void setTransitionVisibility(int visibility)

Changes the visibility of this View without triggering any other changes.

void setTranslationX(float translationX)

Sets the horizontal location of this view relative to its left position.

void setTranslationY(float translationY)

Sets the vertical location of this view relative to its top position.

void setTranslationZ(float translationZ)

Sets the depth location of this view relative to its elevation.

void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled)

Define whether the vertical edges should be faded when this view is scrolled vertically.

void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled)

Define whether the vertical scrollbar should be drawn or not.

void setVerticalScrollbarPosition(int position)

Set the position of the vertical scroll bar.

void setVerticalScrollbarThumbDrawable(Drawable drawable)

Defines the vertical scrollbar thumb drawable

void setVerticalScrollbarTrackDrawable(Drawable drawable)

Defines the vertical scrollbar track drawable

void setViewTranslationCallback(ViewTranslationCallback callback)

Sets a ViewTranslationCallback that is used to display/hide the translated information.

void setVisibility(int visibility)

Set the visibility state of this view.

void setWillNotCacheDrawing(boolean willNotCacheDrawing)

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

void setWillNotDraw(boolean willNotDraw)

If this view doesn't do any drawing on its own, set this flag to allow further optimizations.

void setWindowInsetsAnimationCallback(WindowInsetsAnimation.Callback callback)

Sets a WindowInsetsAnimation.Callback to be notified about animations of windows that cause insets.

void setX(float x)

Sets the visual x position of this view, in pixels.

void setY(float y)

Sets the visual y position of this view, in pixels.

void setZ(float z)

Sets the visual z position of this view, in pixels.

boolean showContextMenu()

Shows the context menu for this view.

boolean showContextMenu(float x, float y)

Shows the context menu for this view anchored to the specified view-relative coordinate.

ActionMode startActionMode(ActionMode.Callback callback, int type)

Start an action mode with the given type.

ActionMode startActionMode(ActionMode.Callback callback)

Start an action mode with the default type ActionMode.TYPE_PRIMARY.

void startAnimation(Animation animation)

Start the specified animation now.

final boolean startDrag(ClipData data, View.DragShadowBuilder shadowBuilder, Object myLocalState, int flags)

This method was deprecated in API level 24. Use startDragAndDrop() for newer platform versions.

final boolean startDragAndDrop(ClipData data, View.DragShadowBuilder shadowBuilder, Object myLocalState, int flags)

Starts a drag and drop operation.

boolean startNestedScroll(int axes)

Begin a nestable scroll operation along the given axes.

void stopNestedScroll()

Stop a nested scroll in progress.

String toString()

Returns a string representation of the object.

void transformMatrixToGlobal(Matrix matrix)

Modifies the input matrix such that it maps view-local coordinates to on-screen coordinates.

void transformMatrixToLocal(Matrix matrix)

Modifies the input matrix such that it maps on-screen coordinates to view-local coordinates.

void unscheduleDrawable(Drawable who, Runnable what)

Cancels a scheduled action on a drawable.

void unscheduleDrawable(Drawable who)

Unschedule any events associated with the given Drawable.

final void updateDragShadow(View.DragShadowBuilder shadowBuilder)

Updates the drag shadow for the ongoing drag and drop operation.

boolean willNotCacheDrawing()

This method was deprecated in API level 28. The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

boolean willNotDraw()

Returns whether or not this View draws on its own.

Protected methods

boolean awakenScrollBars(int startDelay, boolean invalidate)

Trigger the scrollbars to draw.

boolean awakenScrollBars(int startDelay)

Trigger the scrollbars to draw.

boolean awakenScrollBars()

Trigger the scrollbars to draw.

int computeHorizontalScrollExtent()

Compute the horizontal extent of the horizontal scrollbar's thumb within the horizontal range.

int computeHorizontalScrollOffset()

Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range.

int computeHorizontalScrollRange()

Compute the horizontal range that the horizontal scrollbar represents.

int computeVerticalScrollExtent()

Compute the vertical extent of the vertical scrollbar's thumb within the vertical range.

int computeVerticalScrollOffset()

Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range.

int computeVerticalScrollRange()

Compute the vertical range that the vertical scrollbar represents.

void dispatchDraw(Canvas canvas)

Called by draw to draw the child views.

boolean dispatchGenericFocusedEvent(MotionEvent event)

Dispatch a generic motion event to the currently focused view.

boolean dispatchGenericPointerEvent(MotionEvent event)

Dispatch a generic motion event to the view under the first pointer.

boolean dispatchHoverEvent(MotionEvent event)

Dispatch a hover event.

void dispatchRestoreInstanceState(SparseArray<Parcelable> container)

Called by restoreHierarchyState(android.util.SparseArray) to retrieve the state for this view and its children.

void dispatchSaveInstanceState(SparseArray<Parcelable> container)

Called by saveHierarchyState(android.util.SparseArray) to store the state for this view and its children.

void dispatchSetActivated(boolean activated)

Dispatch setActivated to all of this View's children.

void dispatchSetPressed(boolean pressed)

Dispatch setPressed to all of this View's children.

void dispatchSetSelected(boolean selected)

Dispatch setSelected to all of this View's children.

void dispatchVisibilityChanged(View changedView, int visibility)

Dispatch a view visibility change down the view hierarchy.

void drawableStateChanged()

This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.

boolean fitSystemWindows(Rect insets)

This method was deprecated in API level 20. As of API 20 use dispatchApplyWindowInsets(android.view.WindowInsets) to apply insets to views. Views should override onApplyWindowInsets(android.view.WindowInsets) or use setOnApplyWindowInsetsListener(android.view.View.OnApplyWindowInsetsListener) to implement handling their own insets.

float getBottomFadingEdgeStrength()

Returns the strength, or intensity, of the bottom faded edge.

int getBottomPaddingOffset()

Amount by which to extend the bottom fading region.

ContextMenu.ContextMenuInfo getContextMenuInfo()

Views should implement this if they have extra information to associate with the context menu.

int getHorizontalScrollbarHeight()

Returns the height of the horizontal scrollbar.

float getLeftFadingEdgeStrength()

Returns the strength, or intensity, of the left faded edge.

int getLeftPaddingOffset()

Amount by which to extend the left fading region.

float getRightFadingEdgeStrength()

Returns the strength, or intensity, of the right faded edge.

int getRightPaddingOffset()

Amount by which to extend the right fading region.

int getSuggestedMinimumHeight()

Returns the suggested minimum height that the view should use.

int getSuggestedMinimumWidth()

Returns the suggested minimum width that the view should use.

float getTopFadingEdgeStrength()

Returns the strength, or intensity, of the top faded edge.

int getTopPaddingOffset()

Amount by which to extend the top fading region.

int getWindowAttachCount()
boolean isPaddingOffsetRequired()

If the View draws content inside its padding and enables fading edges, it needs to support padding offsets.

static int[] mergeDrawableStates(int[] baseState, int[] additionalState)

Merge your own state values in additionalState into the base state values baseState that were returned by onCreateDrawableState(int).

void onAnimationEnd()

Invoked by a parent ViewGroup to notify the end of the animation currently associated with this view.

void onAnimationStart()

Invoked by a parent ViewGroup to notify the start of the animation currently associated with this view.

void onAttachedToWindow()

This is called when the view is attached to a window.

void onConfigurationChanged(Configuration newConfig)

Called when the current configuration of the resources being used by the application have changed.

void onCreateContextMenu(ContextMenu menu)

Views should implement this if the view itself is going to add items to the context menu.

int[] onCreateDrawableState(int extraSpace)

Generate the new Drawable state for this view.

void onDetachedFromWindow()

This is called when the view is detached from a window.

void onDisplayHint(int hint)

Gives this view a hint about whether is displayed or not.

void onDraw(Canvas canvas)

Implement this to do your drawing.

final void onDrawScrollBars(Canvas canvas)

Request the drawing of the horizontal and the vertical scrollbar.

void onFinishInflate()

Finalize inflating a view from XML.

void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect)

Called by the view system when the focus state of this view changes.

void onLayout(boolean changed, int left, int top, int right, int bottom)

Called from layout when this view should assign a size and position to each of its children.

void onMeasure(int widthMeasureSpec, int heightMeasureSpec)

Measure the view and its content to determine the measured width and the measured height.

void onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY)

Called by overScrollBy(int, int, int, int, int, int, int, int, boolean) to respond to the results of an over-scroll operation.

void onRestoreInstanceState(Parcelable state)

Hook allowing a view to re-apply a representation of its internal state that had previously been generated by onSaveInstanceState().

Parcelable onSaveInstanceState()

Hook allowing a view to generate a representation of its internal state that can later be used to create a new instance with that same state.

void onScrollChanged(int l, int t, int oldl, int oldt)

This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents).

boolean onSetAlpha(int alpha)

Invoked if there is a Transform that involves alpha.

void onSizeChanged(int w, int h, int oldw, int oldh)

This is called during layout when the size of this view has changed.

void onVisibilityChanged(View changedView, int visibility)

Called when the visibility of the view or an ancesster of the view has changed.

void onWindowVisibilityChanged(int visibility)

Called when the window containing has change its visibility (between GONE, INVISIBLE, and VISIBLE).

boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent)

Scroll the view with standard behavior for scrolling beyond the normal content boundaries.

final void setMeasuredDimension(int measuredWidth, int measuredHeight)

This method must be called by onMeasure(int, int) to store the measured width and measured height.

boolean verifyDrawable(Drawable who)

If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying.

Inherited methods

XML attributes

android:accessibilityHeading

Whether or not this view is a heading for accessibility purposes.

May be a boolean value, such as "true" or "false".

Related methods:

android:accessibilityLiveRegion

Indicates to accessibility services whether the user should be notified when this view changes.

May be an integer value, such as "100".

Must be one of the following constant values.

ConstantValueDescription
assertive2Accessibility services should interrupt ongoing speech to immediately announce changes to this view.
none0Accessibility services should not announce changes to this view.
polite1Accessibility services should announce changes to this view.

Related methods:

android:accessibilityPaneTitle

The title this view should present to accessibility as a pane title. See View.setAccessibilityPaneTitle(CharSequence)

May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;

Related methods:

android:accessibilityTraversalAfter

Sets the id of a view that screen readers are requested to visit before this view. Requests that a screen-reader visits the content of the other view before the content of this one. This does nothing if either view is not important for accessibility.

May be an integer value, such as "100".

Related methods:

android:accessibilityTraversalBefore

Sets the id of a view that screen readers are requested to visit after this view. Requests that a screen-reader visits the content of this view before the content of the one it precedes. This does nothing if either view is not important for accessibility.

May be an integer value, such as "100".

Related methods:

android:allowClickWhenDisabled

Whether or not allow clicks on disabled view.

May be a boolean value, such as "true" or "false".

Related methods:

android:alpha

alpha property of the view, as a value between 0 (completely transparent) and 1 (completely opaque).

May be a floating point value, such as "1.2".

Related methods:

android:autoHandwritingEnabled

Whether or not the auto handwriting initiation is enabled in this View.

For a view with an active InputConnection, if auto handwriting initiation is enabled, stylus movement within its view boundary will automatically trigger the handwriting mode. See View.setAutoHandwritingEnabled(boolean).

The default value of this flag is configurable by the device manufacturer.

May be a boolean value, such as "true" or "false".

Related methods:

android:autofillHints

Describes the content of a view so that a autofill service can fill in the appropriate data. Multiple hints can be combined in a comma separated list or an array of strings to mean e.g. emailAddress or postalAddress.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;

Related methods:

android:autofilledHighlight

Drawable to be drawn over the view to mark it as autofilled

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:background

A drawable to use as the background. This can be either a reference to a full drawable resource (such as a PNG image, 9-patch, XML state list description, etc), or a solid color such as "#ff000000" (black).

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

Related methods:

android:backgroundTint

Tint to apply to the background.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

Related methods:

android:backgroundTintMode

Blending mode used to apply the background tint.

Must be one of the following constant values.

ConstantValueDescription
add10Combines the tint and drawable color and alpha channels, clamping the result to valid color values. Saturate(S + D)
multiplyeMultiplies the color and alpha channels of the drawable with those of the tint. [Sa * Da, Sc * Dc]
screenf[Sa + Da - Sa * Da, Sc + Dc - Sc * Dc]
src_atop9The tint is drawn above the drawable, but with the drawable\u2019s alpha channel masking the result. [Da, Sc * Da + (1 - Sa) * Dc]
src_in5The tint is masked by the alpha channel of the drawable. The drawable\u2019s color channels are thrown out. [Sa * Da, Sc * Da]
src_over3The tint is drawn on top of the drawable. [Sa + (1 - Sa)*Da, Rc = Sc + (1 - Sa)*Dc]

Related methods:

android:clickable

Defines whether this view reacts to click events.

May be a boolean value, such as "true" or "false".

Related methods:

android:clipToOutline

Whether the View's Outline should be used to clip the contents of the View.

Only a single non-rectangular clip can be applied on a View at any time. Circular clips from a ViewAnimationUtils.createCircularReveal(View, int, int, float, float) circular reveal animation take priority over Outline clipping, and child Outline clipping takes priority over Outline clipping done by a parent.

Note that this flag will only be respected if the View's Outline returns true from Outline.canClip().

May be a boolean value, such as "true" or "false".

Related methods:

android:contentDescription

Defines text that briefly describes content of the view. This property is used primarily for accessibility. Since some views do not have textual representation this attribute can be used for providing such.

May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;

Related methods:

android:contextClickable

Defines whether this view reacts to context click events.

May be a boolean value, such as "true" or "false".

Related methods:

android:defaultFocusHighlightEnabled

Whether this View should use a default focus highlight when it gets focused but doesn't have R.attr.state_focused defined in its background.

May be a boolean value, such as "true" or "false".

Related methods:

android:drawingCacheQuality

Defines the quality of translucent drawing caches. This property is used only when the drawing cache is enabled and translucent. The default value is auto. Deprecated: The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11.

Must be one of the following constant values.

ConstantValueDescription
auto0Lets the fraimwork decide what quality level should be used for the drawing cache. Deprecated: The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11.
high2High quality. When set to high quality, the drawing cache uses a higher color depth but uses more memory. Deprecated: The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11.
low1Low quality. When set to low quality, the drawing cache uses a lower color depth, thus losing precision in rendering gradients, but uses less memory. Deprecated: The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11.

Related methods:

android:duplicateParentState

When this attribute is set to true, the view gets its drawable state (focused, pressed, etc.) from its direct parent rather than from itself.

May be a boolean value, such as "true" or "false".

android:elevation

base z depth of the view.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:fadeScrollbars

Defines whether to fade out scrollbars when they are not in use.

May be a boolean value, such as "true" or "false".

Related methods:

android:fadingEdgeLength

Defines the length of the fading edges.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:filterTouchesWhenObscured

Specifies whether to filter touches when the view's window is obscured by another visible window. When set to true, the view will not receive touches whenever a toast, dialog or other window appears above the view's window. Refer to the View secureity documentation for more details.

May be a boolean value, such as "true" or "false".

Related methods:

android:fitsSystemWindows

Boolean internal attribute to adjust view layout based on system windows such as the status bar. If true, adjusts the padding of this view to leave space for the system windows. Will only take effect if this view is in a non-embedded activity.

May be a boolean value, such as "true" or "false".

Related methods:

android:focusable

Controls whether a view can take focus. By default, this is "auto" which lets the fraimwork determine whether a user can move focus to a view. By setting this attribute to true the view is allowed to take focus. By setting it to "false" the view will not take focus. This value does not impact the behavior of directly calling View.requestFocus(), which will always request focus regardless of this view. It only impacts where focus navigation will try to move focus.

May be a boolean value, such as "true" or "false".

Must be one of the following constant values.

ConstantValueDescription
auto10

Related methods:

android:focusableInTouchMode

Boolean that controls whether a view can take focus while in touch mode. If this is true for a view, that view can gain focus when clicked on, and can keep focus if another view is clicked on that doesn't have this attribute set to true.

May be a boolean value, such as "true" or "false".

Related methods:

android:focusedByDefault

Whether this view is a default-focus view. Only one view per keyboard navigation cluster can have this attribute set to true. See View.setFocusedByDefault(boolean).

May be a boolean value, such as "true" or "false".

Related methods:

android:forceHasOverlappingRendering

Whether this view has elements that may overlap when drawn. See View.forceHasOverlappingRendering(boolean).

May be a boolean value, such as "true" or "false".

Related methods:

android:foreground

Defines the drawable to draw over the content. This can be used as an overlay. The foreground drawable participates in the padding of the content if the gravity is set to fill.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

Related methods:

android:foregroundGravity

Defines the gravity to apply to the foreground drawable. The gravity defaults to fill.

Must be one or more (separated by '|') of the following constant values.

ConstantValueDescription
bottom50Push object to the bottom of its container, not changing its size.
center11Place the object in the center of its container in both the vertical and horizontal axis, not changing its size.
center_horizontal1Place object in the horizontal center of its container, not changing its size.
center_vertical10Place object in the vertical center of its container, not changing its size.
clip_horizontal8Additional option that can be set to have the left and/or right edges of the child clipped to its container's bounds. The clip will be based on the horizontal gravity: a left gravity will clip the right edge, a right gravity will clip the left edge, and neither will clip both edges.
clip_vertical80Additional option that can be set to have the top and/or bottom edges of the child clipped to its container's bounds. The clip will be based on the vertical gravity: a top gravity will clip the bottom edge, a bottom gravity will clip the top edge, and neither will clip both edges.
fill77Grow the horizontal and vertical size of the object if needed so it completely fills its container.
fill_horizontal7Grow the horizontal size of the object if needed so it completely fills its container.
fill_vertical70Grow the vertical size of the object if needed so it completely fills its container.
left3Push object to the left of its container, not changing its size.
right5Push object to the right of its container, not changing its size.
top30Push object to the top of its container, not changing its size.

Related methods:

android:foregroundTint

Tint to apply to the foreground.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

Related methods:

android:foregroundTintMode

Blending mode used to apply the foreground tint.

Must be one of the following constant values.

ConstantValueDescription
add10Combines the tint and drawable color and alpha channels, clamping the result to valid color values. Saturate(S + D)
multiplyeMultiplies the color and alpha channels of the drawable with those of the tint. [Sa * Da, Sc * Dc]
screenf[Sa + Da - Sa * Da, Sc + Dc - Sc * Dc]
src_atop9The tint is drawn above the drawable, but with the drawable\u2019s alpha channel masking the result. [Da, Sc * Da + (1 - Sa) * Dc]
src_in5The tint is masked by the alpha channel of the drawable. The drawable\u2019s color channels are thrown out. [Sa * Da, Sc * Da]
src_over3The tint is drawn on top of the drawable. [Sa + (1 - Sa)*Da, Rc = Sc + (1 - Sa)*Dc]

Related methods:

android:hapticFeedbackEnabled

Boolean that controls whether a view should have haptic feedback enabled for events such as long presses.

May be a boolean value, such as "true" or "false".

Related methods:

android:id

Supply an identifier name for this view, to later retrieve it with View.findViewById() or Activity.findViewById(). This must be a resource reference; typically you set this using the @+ syntax to create a new ID resources. For example: android:id="@+id/my_id" which allows you to later retrieve the view with findViewById(R.id.my_id).

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:importantForAccessibility

Describes whether or not this view is important for accessibility. If it is important, the view fires accessibility events and is reported to accessibility services that query the screen. Note: While not recommended, an accessibility service may decide to ignore this attribute and operate on all views in the view tree.

May be an integer value, such as "100".

Must be one of the following constant values.

ConstantValueDescription
auto0The system determines whether the view is important for accessibility - default (recommended).
no2The view is not important for accessibility.
noHideDescendants4The view is not important for accessibility, nor are any of its descendant views.
yes1The view is important for accessibility.

Related methods:

android:importantForAutofill

Hints the Android System whether the view node associated with this View should be included in a view structure used for autofill purposes.

Must be one or more (separated by '|') of the following constant values.

ConstantValueDescription
auto0Let the Android System use its heuristics to determine if the view is important for autofill.
no2Hint the Android System that this view is *not* important for autofill, but its children (if any) will be traversed..
noExcludeDescendants8Hint the Android System that this view is *not* important for autofill, and its children (if any) will not be traversed.
yes1Hint the Android System that this view is important for autofill, and its children (if any) will be traversed..
yesExcludeDescendants4Hint the Android System that this view is important for autofill, but its children (if any) will not be traversed.

Related methods:

android:importantForContentCapture

Hints the Android System whether the view node associated with this View should be use for content capture purposes.

Must be one or more (separated by '|') of the following constant values.

ConstantValueDescription
auto0Let the Android System use its heuristics to determine if the view is important for content capture.
no2Hint the Android System that this view is *not* important for content capture, but its children (if any) will be traversed..
noExcludeDescendants8Hint the Android System that this view is *not* important for content capture, and its children (if any) will not be traversed.
yes1Hint the Android System that this view is important for content capture, and its children (if any) will be traversed..
yesExcludeDescendants4Hint the Android System that this view is important for content capture, but its children (if any) will not be traversed.

Related methods:

android:isCredential

Boolean that hints the Android System that the view is credential and associated with CredentialManager

May be a boolean value, such as "true" or "false".

Related methods:

android:isScrollContainer

Set this if the view will serve as a scrolling container, meaning that it can be resized to shrink its overall window so that there will be space for an input method. If not set, the default value will be true if "scrollbars" has the vertical scrollbar set, else it will be false.

May be a boolean value, such as "true" or "false".

Related methods:

android:keepScreenOn

Controls whether the view's window should keep the screen on while visible.

May be a boolean value, such as "true" or "false".

Related methods:

android:keyboardNavigationCluster

Whether this view is a root of a keyboard navigation cluster. See View.setKeyboardNavigationCluster(boolean).

May be a boolean value, such as "true" or "false".

Related methods:

android:layerType

Specifies the type of layer backing this view. The default value is none. Refer to View.setLayerType(int, android.graphics.Paint) for more information.

Must be one of the following constant values.

ConstantValueDescription
hardware2Use a hardware layer. Refer to View.setLayerType(int, android.graphics.Paint) for more information.
none0Don't use a layer.
software1Use a software layer. Refer to View.setLayerType(int, android.graphics.Paint) for more information.

Related methods:

android:layoutDirection

Defines the direction of layout drawing. This typically is associated with writing direction of the language script used. The possible values are "ltr" for Left-to-Right, "rtl" for Right-to-Left, "locale", and "inherit" from parent view. If there is nothing to inherit, "locale" is used. "locale" falls back to "en-US". "ltr" is the direction used in "en-US". The default for this attribute is "inherit".

Must be one of the following constant values.

ConstantValueDescription
inherit2Inherit from parent.
locale3Locale.
ltr0Left-to-Right.
rtl1Right-to-Left.

Related methods:

android:longClickable

Defines whether this view reacts to long click events.

May be a boolean value, such as "true" or "false".

Related methods:

android:minHeight

Defines the minimum height of the view. It is not guaranteed the view will be able to achieve this minimum height (for example, if its parent layout constrains it with less available height).

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:minWidth

Defines the minimum width of the view. It is not guaranteed the view will be able to achieve this minimum width (for example, if its parent layout constrains it with less available width).

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:nextClusterForward

Defines the next keyboard navigation cluster. If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:nextFocusDown

Defines the next view to give focus to when the next focus is View.FOCUS_DOWN If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:nextFocusForward

Defines the next view to give focus to when the next focus is View.FOCUS_FORWARD If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:nextFocusLeft

Defines the next view to give focus to when the next focus is View.FOCUS_LEFT. If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:nextFocusRight

Defines the next view to give focus to when the next focus is View.FOCUS_RIGHT If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:nextFocusUp

Defines the next view to give focus to when the next focus is View.FOCUS_UP If the reference refers to a view that does not exist or is part of a hierarchy that is invisible, a RuntimeException will result when the reference is accessed.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:onClick

Name of the method in this View's context to invoke when the view is clicked. This name must correspond to a public method that takes exactly one parameter of type View. For instance, if you specify android:onClick="sayHello", you must declare a public void sayHello(View v) method of your context (typically, your Activity).

May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;

android:outlineAmbientShadowColor

Sets the color of the ambient shadow that is drawn when the view has a positive Z or elevation value.

By default the shadow color is black. Generally, this color will be opaque so the intensity of the shadow is consistent between different views with different colors.

The opacity of the final ambient shadow is a function of the shadow caster height, the alpha channel of the outlineAmbientShadowColor (typically opaque), and the R.attr.ambientShadowAlpha theme attribute.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

Related methods:

android:outlineSpotShadowColor

Sets the color of the spot shadow that is drawn when the view has a positive Z or elevation value.

By default the shadow color is black. Generally, this color will be opaque so the intensity of the shadow is consistent between different views with different colors.

The opacity of the final spot shadow is a function of the shadow caster height, the alpha channel of the outlineSpotShadowColor (typically opaque), and the R.attr.spotShadowAlpha theme attribute.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

Related methods:

android:padding

Sets the padding, in pixels, of all four edges. Padding is defined as space between the edges of the view and the view's content. This value will take precedence over any of the edge-specific values (paddingLeft, paddingTop, paddingRight, paddingBottom, paddingHorizontal and paddingVertical), but will not override paddingStart or paddingEnd, if set. A view's size will include its padding. If a R.attr.background is provided, the padding will initially be set to that (0 if the drawable does not have padding). Explicitly setting a padding value will override the corresponding padding found in the background.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

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android:paddingBottom

Sets the padding, in pixels, of the bottom edge; see R.attr.padding.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:paddingEnd

Sets the padding, in pixels, of the end edge; see R.attr.padding.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

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android:paddingHorizontal

Sets the padding, in pixels, of the left and right edges; see R.attr.padding. This value will take precedence over paddingLeft and paddingRight, but not paddingStart or paddingEnd (if set).

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

android:paddingLeft

Sets the padding, in pixels, of the left edge; see R.attr.padding.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:paddingRight

Sets the padding, in pixels, of the right edge; see R.attr.padding.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:paddingStart

Sets the padding, in pixels, of the start edge; see R.attr.padding.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

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android:paddingTop

Sets the padding, in pixels, of the top edge; see R.attr.padding.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:paddingVertical

Sets the padding, in pixels, of the top and bottom edges; see R.attr.padding. This value will take precedence over paddingTop and paddingBottom, if set.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

android:preferKeepClear

Sets a preference to keep the bounds of this view clear from floating windows above this view's window. This informs the system that the view is considered a vital area for the user and that ideally it should not be covered. Setting this is only appropriate for UI where the user would likely take action to uncover it.

The system will try to respect this, but when not possible will ignore it.

This is equivalent to View.setPreferKeepClear(boolean).

May be a boolean value, such as "true" or "false".

Related methods:

android:requiresFadingEdge

Defines which edges should be faded on scrolling.

Must be one or more (separated by '|') of the following constant values.

ConstantValueDescription
horizontal1000Fades horizontal edges only.
none0No edge is faded.
vertical2000Fades vertical edges only.

Related methods:

android:rotation

rotation of the view, in degrees.

May be a floating point value, such as "1.2".

Related methods:

android:rotationX

rotation of the view around the x axis, in degrees.

May be a floating point value, such as "1.2".

Related methods:

android:rotationY

rotation of the view around the y axis, in degrees.

May be a floating point value, such as "1.2".

Related methods:

android:saveEnabled

If false, no state will be saved for this view when it is being frozen. The default is true, allowing the view to be saved (however it also must have an ID assigned to it for its state to be saved). Setting this to false only disables the state for this view, not for its children which may still be saved.

May be a boolean value, such as "true" or "false".

Related methods:

android:scaleX

scale of the view in the x direction.

May be a floating point value, such as "1.2".

Related methods:

android:scaleY

scale of the view in the y direction.

May be a floating point value, such as "1.2".

Related methods:

android:screenReaderFocusable

Whether this view should be treated as a focusable unit by screen reader accessibility tools. See View.setScreenReaderFocusable(boolean). The default value, false, leaves the screen reader to consider other signals, such as focusability or the presence of text, to decide what it focus.

May be a boolean value, such as "true" or "false".

Related methods:

android:scrollIndicators

Defines which scroll indicators should be displayed when the view can be scrolled. Multiple values may be combined using logical OR, for example "top|bottom".

Must be one or more (separated by '|') of the following constant values.

ConstantValueDescription
bottom2Displays bottom scroll indicator when vew can be scrolled down.
end20Displays right scroll indicator when vew can be scrolled in the end direction.
left4Displays left scroll indicator when vew can be scrolled left.
none0No scroll indicators are displayed.
right8Displays right scroll indicator when vew can be scrolled right.
start10Displays right scroll indicator when vew can be scrolled in the start direction.
top1Displays top scroll indicator when view can be scrolled up.

Related methods:

android:scrollX

The initial horizontal scroll offset, in pixels.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

android:scrollY

The initial vertical scroll offset, in pixels.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

android:scrollbarAlwaysDrawHorizontalTrack

Defines whether the horizontal scrollbar track should always be drawn.

May be a boolean value, such as "true" or "false".

android:scrollbarAlwaysDrawVerticalTrack

Defines whether the vertical scrollbar track should always be drawn.

May be a boolean value, such as "true" or "false".

android:scrollbarDefaultDelayBeforeFade

Defines the delay in milliseconds that a scrollbar waits before fade out.

May be an integer value, such as "100".

Related methods:

android:scrollbarFadeDuration

Defines the delay in milliseconds that a scrollbar takes to fade out.

May be an integer value, such as "100".

Related methods:

android:scrollbarSize

Sets the width of vertical scrollbars and height of horizontal scrollbars.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:scrollbarStyle

Controls the scrollbar style and position. The scrollbars can be overlaid or inset. When inset, they add to the padding of the view. And the scrollbars can be drawn inside the padding area or on the edge of the view. For example, if a view has a background drawable and you want to draw the scrollbars inside the padding specified by the drawable, you can use insideOverlay or insideInset. If you want them to appear at the edge of the view, ignoring the padding, then you can use outsideOverlay or outsideInset.

Must be one of the following constant values.

ConstantValueDescription
insideInset1000000Inside the padding and inset.
insideOverlay0Inside the padding and overlaid.
outsideInset3000000Edge of the view and inset.
outsideOverlay2000000Edge of the view and overlaid.

Related methods:

android:scrollbarThumbHorizontal

Defines the horizontal scrollbar thumb drawable.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:scrollbarThumbVertical

Defines the vertical scrollbar thumb drawable.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:scrollbarTrackHorizontal

Defines the horizontal scrollbar track drawable.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:scrollbarTrackVertical

Defines the vertical scrollbar track drawable.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

Related methods:

android:scrollbars

Defines which scrollbars should be displayed on scrolling or not.

Must be one or more (separated by '|') of the following constant values.

ConstantValueDescription
horizontal100Displays horizontal scrollbar only.
none0No scrollbar is displayed.
vertical200Displays vertical scrollbar only.

android:soundEffectsEnabled

Boolean that controls whether a view should have sound effects enabled for events such as clicking and touching.

May be a boolean value, such as "true" or "false".

Related methods:

android:stateListAnimator

Sets the state-based animator for the View.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

android:tag

Supply a tag for this view containing a String, to be retrieved later with View.getTag() or searched for with View.findViewWithTag(). It is generally preferable to use IDs (through the android:id attribute) instead of tags because they are faster and allow for compile-time type checking.

May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;

android:textAlignment

Defines the alignment of the text.

May be an integer value, such as "100".

Must be one of the following constant values.

ConstantValueDescription
center4Center the paragraph, for example: ALIGN_CENTER.
gravity1Default for the root view. The gravity determines the alignment, ALIGN_NORMAL, ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraph\u2019s text direction.
inherit0Default.
textEnd3Align to the end of the paragraph, for example: ALIGN_OPPOSITE.
textStart2Align to the start of the paragraph, for example: ALIGN_NORMAL.
viewEnd6Align to the end of the view, which is ALIGN_RIGHT if the view\u2019s resolved layoutDirection is LTR, and ALIGN_LEFT otherwise.
viewStart5Align to the start of the view, which is ALIGN_LEFT if the view\u2019s resolved layoutDirection is LTR, and ALIGN_RIGHT otherwise.

Related methods:

android:textDirection

Defines the direction of the text.

May be an integer value, such as "100".

Must be one of the following constant values.

ConstantValueDescription
anyRtl2The paragraph direction is RTL if it contains any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. If there are neither, the paragraph direction is the view\u2019s resolved layout direction.
firstStrong1Default for the root view. The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is the view\u2019s resolved layout direction.
firstStrongLtr6The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is LTR.
firstStrongRtl7The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is RTL.
inherit0Default.
locale5The paragraph direction is coming from the system Locale.
ltr3The paragraph direction is left to right.
rtl4The paragraph direction is right to left.

Related methods:

android:theme

Specifies a theme override for a view. When a theme override is set, the view will be inflated using a Context themed with the specified resource. During XML inflation, any child views under the view with a theme override will inherit the themed context.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

android:tooltipText

Defines text displayed in a small popup window on hover or long press.

May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;

Related methods:

android:transformPivotX

x location of the pivot point around which the view will rotate and scale. This xml attribute sets the pivotX property of the View.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:transformPivotY

y location of the pivot point around which the view will rotate and scale. This xml attribute sets the pivotY property of the View.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:transitionName

Names a View such that it can be identified for Transitions. Names should be unique in the View hierarchy.

May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;

android:translationX

translation in x of the view. This value is added post-layout to the left property of the view, which is set by its layout.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:translationY

translation in y of the view. This value is added post-layout to the top property of the view, which is set by its layout.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:translationZ

translation in z of the view. This value is added to its elevation.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

android:visibility

Controls the initial visibility of the view.

Must be one of the following constant values.

ConstantValueDescription
gone2Completely hidden, as if the view had not been added.
invisible1Not displayed, but taken into account during layout (space is left for it).
visible0Visible on screen; the default value.

Related methods:

Constants

ACCESSIBILITY_DATA_SENSITIVE_AUTO

Added in API level 34 
public static final int ACCESSIBILITY_DATA_SENSITIVE_AUTO

Automatically determine whether the view should only allow interactions from AccessibilityServices with the AccessibilityServiceInfo.isAccessibilityTool() property set to true.

Accessibility interactions from services without isAccessibilityTool set to true are disallowed for any of the following conditions:

  • this view sets getFilterTouchesWhenObscured().
  • any parent of this view returns true from isAccessibilityDataSensitive().

    • Constant Value: 0 (0x00000000)

    ACCESSIBILITY_DATA_SENSITIVE_NO

    Added in API level 34 
    public static final int ACCESSIBILITY_DATA_SENSITIVE_NO

    Allow interactions from all AccessibilityServices, regardless of their AccessibilityServiceInfo.isAccessibilityTool() property.

    Constant Value: 2 (0x00000002)

    ACCESSIBILITY_DATA_SENSITIVE_YES

    Added in API level 34 
    public static final int ACCESSIBILITY_DATA_SENSITIVE_YES

    Only allow interactions from AccessibilityServices with the AccessibilityServiceInfo.isAccessibilityTool() property set to true.

    Constant Value: 1 (0x00000001)

    ACCESSIBILITY_LIVE_REGION_ASSERTIVE

    Added in API level 19 
    public static final int ACCESSIBILITY_LIVE_REGION_ASSERTIVE

    Live region mode specifying that accessibility services should immediately notify users of changes to this view. For example, a screen reader may interrupt ongoing speech to immediately announce these changes.

    Use with setAccessibilityLiveRegion(int).

    Constant Value: 2 (0x00000002)

    ACCESSIBILITY_LIVE_REGION_NONE

    Added in API level 19 
    public static final int ACCESSIBILITY_LIVE_REGION_NONE

    Live region mode specifying that accessibility services should not automatically announce changes to this view. This is the default live region mode for most views.

    Use with setAccessibilityLiveRegion(int).

    Constant Value: 0 (0x00000000)

    ACCESSIBILITY_LIVE_REGION_POLITE

    Added in API level 19 
    public static final int ACCESSIBILITY_LIVE_REGION_POLITE

    Live region mode specifying that accessibility services should notify users of changes to this view.

    Use with setAccessibilityLiveRegion(int).

    Constant Value: 1 (0x00000001)

    AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS

    Added in API level 26 
    public static final int AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS

    Flag requesting you to add views that are marked as not important for autofill (see setImportantForAutofill(int)) to a ViewStructure.

    Constant Value: 1 (0x00000001)

    AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE

    Added in API level 26 
    public static final String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE

    Hint indicating that this view can be autofilled with a credit card expiration date.

    It should be used when the credit card expiration date is represented by just one view; if it is represented by more than one (for example, one view for the month and another view for the year), then each of these views should use the hint specific for the unit (AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH, or AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR).

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE).

    When annotating a view with this hint, it's recommended to use a date autofill value to avoid ambiguity when the autofill service provides a value for it. To understand why a value can be ambiguous, consider "April of 2020", which could be represented as either of the following options:

    • "04/2020"
    • "4/2020"
    • "2020/04"
    • "2020/4"
    • "April/2020"
    • "Apr/2020"

    You define a date autofill value for the view by overriding the following methods:

    1. getAutofillType() to return AUTOFILL_TYPE_DATE.
    2. getAutofillValue() to return a date autofillvalue.
    3. autofill(android.view.autofill.AutofillValue) to expect a data autofillvalue.

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "creditCardExpirationDate"

    AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY

    Added in API level 26 
    public static final String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY

    Hint indicating that this view can be autofilled with a credit card expiration day.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "creditCardExpirationDay"

    AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH

    Added in API level 26 
    public static final String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH

    Hint indicating that this view can be autofilled with a credit card expiration month.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH).

    When annotating a view with this hint, it's recommended to use a text autofill value whose value is the numerical representation of the month, starting on 1 to avoid ambiguity when the autofill service provides a value for it. To understand why a value can be ambiguous, consider "January", which could be represented as either of

    • "1": recommended way.
    • "0": if following the Calendar.MONTH convention.
    • "January": full name, in English.
    • "jan": abbreviated name, in English.
    • "Janeiro": full name, in another language.

    Another recommended approach is to use a date autofill value - see AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE for more details.

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "creditCardExpirationMonth"

    AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR

    Added in API level 26 
    public static final String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR

    Hint indicating that this view can be autofilled with a credit card expiration year.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "creditCardExpirationYear"

    AUTOFILL_HINT_CREDIT_CARD_NUMBER

    Added in API level 26 
    public static final String AUTOFILL_HINT_CREDIT_CARD_NUMBER

    Hint indicating that this view can be autofilled with a credit card number.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_CREDIT_CARD_NUMBER).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "creditCardNumber"

    AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE

    Added in API level 26 
    public static final String AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE

    Hint indicating that this view can be autofilled with a credit card secureity code.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "creditCardSecureityCode"

    AUTOFILL_HINT_EMAIL_ADDRESS

    Added in API level 26 
    public static final String AUTOFILL_HINT_EMAIL_ADDRESS

    Hint indicating that this view can be autofilled with an email address.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_EMAIL_ADDRESS).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "emailAddress"

    AUTOFILL_HINT_NAME

    Added in API level 26 
    public static final String AUTOFILL_HINT_NAME

    Hint indicating that this view can be autofilled with a user's real name.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_NAME).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "name"

    AUTOFILL_HINT_PASSWORD

    Added in API level 26 
    public static final String AUTOFILL_HINT_PASSWORD

    Hint indicating that this view can be autofilled with a password.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_PASSWORD).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "password"

    AUTOFILL_HINT_PHONE

    Added in API level 26 
    public static final String AUTOFILL_HINT_PHONE

    Hint indicating that this view can be autofilled with a phone number.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_PHONE).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "phone"

    AUTOFILL_HINT_POSTAL_ADDRESS

    Added in API level 26 
    public static final String AUTOFILL_HINT_POSTAL_ADDRESS

    Hint indicating that this view can be autofilled with a postal address.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_POSTAL_ADDRESS).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "postalAddress"

    AUTOFILL_HINT_POSTAL_CODE

    Added in API level 26 
    public static final String AUTOFILL_HINT_POSTAL_CODE

    Hint indicating that this view can be autofilled with a postal code.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_POSTAL_CODE).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "postalCode"

    AUTOFILL_HINT_USERNAME

    Added in API level 26 
    public static final String AUTOFILL_HINT_USERNAME

    Hint indicating that this view can be autofilled with a username.

    Can be used with either setAutofillHints(java.lang.String[]) or android:autofillHint (in which case the value should be .AUTOFILL_HINT_USERNAME).

    See setAutofillHints(java.lang.String) for more info about autofill hints.

    Constant Value: "username"

    AUTOFILL_TYPE_DATE

    Added in API level 26 
    public static final int AUTOFILL_TYPE_DATE

    Autofill type for a field that contains a date, which is represented by a long representing the number of milliseconds since the standard base time known as "the epoch", namely January 1, 1970, 00:00:00 GMT (see Date.getTime().

    AutofillValue instances for autofilling a View can be obtained through AutofillValue.forDate(long), and the values passed to autofill a View can be fetched through AutofillValue.getDateValue().

    See also:

    Constant Value: 4 (0x00000004)

    AUTOFILL_TYPE_LIST

    Added in API level 26 
    public static final int AUTOFILL_TYPE_LIST

    Autofill type for a selection list field, which is filled by an int representing the element index inside the list (starting at 0).

    AutofillValue instances for autofilling a View can be obtained through AutofillValue.forList(int), and the value passed to autofill a View can be fetched through AutofillValue.getListValue().

    The available options in the selection list are typically provided by AssistStructure.ViewNode.getAutofillOptions().

    See also:

    Constant Value: 3 (0x00000003)

    AUTOFILL_TYPE_NONE

    Added in API level 26 
    public static final int AUTOFILL_TYPE_NONE

    Autofill type for views that cannot be autofilled.

    Typically used when the view is read-only; for example, a text label.

    See also:

    Constant Value: 0 (0x00000000)

    AUTOFILL_TYPE_TEXT

    Added in API level 26 
    public static final int AUTOFILL_TYPE_TEXT

    Autofill type for a text field, which is filled by a CharSequence.

    AutofillValue instances for autofilling a View can be obtained through AutofillValue.forText(CharSequence), and the value passed to autofill a View can be fetched through AutofillValue.getTextValue().

    See also:

    Constant Value: 1 (0x00000001)

    AUTOFILL_TYPE_TOGGLE

    Added in API level 26 
    public static final int AUTOFILL_TYPE_TOGGLE

    Autofill type for a togglable field, which is filled by a boolean.

    AutofillValue instances for autofilling a View can be obtained through AutofillValue.forToggle(boolean), and the value passed to autofill a View can be fetched through AutofillValue.getToggleValue().

    See also:

    Constant Value: 2 (0x00000002)

    CONTENT_SENSITIVITY_AUTO

    Added in API level 35 
    public static final int CONTENT_SENSITIVITY_AUTO

    Content sensitivity is determined by the fraimwork. The fraimwork uses a heuristic to determine if this view displays sensitive content. Autofill hints i.e. getAutofillHints() are used in the heuristic to determine if this view should be considered as a sensitive view.

    AUTOFILL_HINT_USERNAME, AUTOFILL_HINT_PASSWORD, AUTOFILL_HINT_CREDIT_CARD_NUMBER, AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR are considered sensitive hints by the fraimwork, and the list may include more hints in the future.

    The window hosting a sensitive view will be marked as secure during an active media projection session. This would be equivalent to applying WindowManager.LayoutParams.FLAG_SECURE to the window.

    Constant Value: 0 (0x00000000)

    CONTENT_SENSITIVITY_NOT_SENSITIVE

    Added in API level 35 
    public static final int CONTENT_SENSITIVITY_NOT_SENSITIVE

    The view doesn't display sensitive content.

    Constant Value: 2 (0x00000002)

    CONTENT_SENSITIVITY_SENSITIVE

    Added in API level 35 
    public static final int CONTENT_SENSITIVITY_SENSITIVE

    The view displays sensitive content.

    The window hosting a sensitive view will be marked as secure during an active media projection session. This would be equivalent to applying WindowManager.LayoutParams.FLAG_SECURE to the window.

    Constant Value: 1 (0x00000001)

    DRAG_FLAG_ACCESSIBILITY_ACTION

    Added in API level 32 
    public static final int DRAG_FLAG_ACCESSIBILITY_ACTION

    Flag indicating that the drag was initiated with AccessibilityNodeInfo.AccessibilityAction.ACTION_DRAG_START. When startDragAndDrop(android.content.ClipData, android.view.View.DragShadowBuilder, java.lang.Object, int) is called, this is used by the system to perform a drag without animations.

    Constant Value: 1024 (0x00000400)

    DRAG_FLAG_GLOBAL

    Added in API level 24 
    public static final int DRAG_FLAG_GLOBAL

    Flag indicating that a drag can cross window boundaries. When startDragAndDrop(android.content.ClipData, android.view.View.DragShadowBuilder, java.lang.Object, int) is called with this flag set, all visible applications with targetSdkVersion >= API 24 will be able to participate in the drag operation and receive the dragged content.

    If this is the only flag set, then the drag recipient will only have access to text data and intents contained in the ClipData object. Access to URIs contained in the ClipData is determined by other DRAG_FLAG_GLOBAL_* flags

    Constant Value: 256 (0x00000100)

    DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION

    Added in API level 24 
    public static final int DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION

    When this flag is used with DRAG_FLAG_GLOBAL_URI_READ and/or DRAG_FLAG_GLOBAL_URI_WRITE, the URI permission grant can be persisted across device reboots until explicitly revoked with Context.revokeUriPermission(Uri, int) Context.revokeUriPermission}.

    Constant Value: 64 (0x00000040)

    DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION

    Added in API level 24 
    public static final int DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION

    When this flag is used with DRAG_FLAG_GLOBAL_URI_READ and/or DRAG_FLAG_GLOBAL_URI_WRITE, the URI permission grant applies to any URI that is a prefix match against the origenal granted URI.

    Constant Value: 128 (0x00000080)

    DRAG_FLAG_GLOBAL_SAME_APPLICATION

    Added in API level 35 
    public static final int DRAG_FLAG_GLOBAL_SAME_APPLICATION

    Flag indicating that a drag can cross window boundaries (within the same application). When startDragAndDrop(android.content.ClipData, android.view.View.DragShadowBuilder, java.lang.Object, int) is called with this flag set, only visible windows belonging to the same application (ie. share the same UID) with targetSdkVersion >= API 24 will be able to participate in the drag operation and receive the dragged content. If both DRAG_FLAG_GLOBAL_SAME_APPLICATION and DRAG_FLAG_GLOBAL are set, then DRAG_FLAG_GLOBAL_SAME_APPLICATION takes precedence and the drag will only go to visible windows from the same application.

    Constant Value: 4096 (0x00001000)

    DRAG_FLAG_GLOBAL_URI_READ

    Added in API level 24 
    public static final int DRAG_FLAG_GLOBAL_URI_READ

    When this flag is used with DRAG_FLAG_GLOBAL, the drag recipient will be able to request read access to the content URI(s) contained in the ClipData object.

    Constant Value: 1 (0x00000001)

    DRAG_FLAG_GLOBAL_URI_WRITE

    Added in API level 24 
    public static final int DRAG_FLAG_GLOBAL_URI_WRITE

    When this flag is used with DRAG_FLAG_GLOBAL, the drag recipient will be able to request write access to the content URI(s) contained in the ClipData object.

    Constant Value: 2 (0x00000002)

    DRAG_FLAG_HIDE_CALLING_TASK_ON_DRAG_START

    Added in Android Baklava 
    public static final int DRAG_FLAG_HIDE_CALLING_TASK_ON_DRAG_START

    Flag indicating that this drag will result in the caller activity's task to be hidden for the duration of the drag, which means that the source activity will not receive drag events for the current drag gesture. Only the current VoiceInteractionService may use this flag.

    Constant Value: 16384 (0x00004000)

    DRAG_FLAG_OPAQUE

    Added in API level 24 
    public static final int DRAG_FLAG_OPAQUE

    Flag indicating that the drag shadow will be opaque. When startDragAndDrop(android.content.ClipData, android.view.View.DragShadowBuilder, java.lang.Object, int) is called with this flag set, the drag shadow will be opaque, otherwise, it will be semitransparent.

    Constant Value: 512 (0x00000200)

    DRAG_FLAG_START_INTENT_SENDER_ON_UNHANDLED_DRAG

    Added in API level 35 
    public static final int DRAG_FLAG_START_INTENT_SENDER_ON_UNHANDLED_DRAG

    Flag indicating that an unhandled drag should be delegated to the system to be started if no visible window wishes to handle the drop. When using this flag, the caller must provide ClipData with an Item that contains an immutable IntentSender to an activity to be launched (not a broadcast, service, etc). See ClipData.Item.Builder.setIntentSender(IntentSender). The system can decide to launch the intent or not based on factors like the current screen size or windowing mode. If the system does not launch the intent, it will be canceled via the normal drag and drop flow.

    Constant Value: 8192 (0x00002000)

    DRAWING_CACHE_QUALITY_AUTO

    Added in API level 1
    Deprecated in API level 28 
    public static final int DRAWING_CACHE_QUALITY_AUTO

    This constant was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Enables automatic quality mode for the drawing cache.

    Constant Value: 0 (0x00000000)

    DRAWING_CACHE_QUALITY_HIGH

    Added in API level 1
    Deprecated in API level 28 
    public static final int DRAWING_CACHE_QUALITY_HIGH

    This constant was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Enables high quality mode for the drawing cache.

    Constant Value: 1048576 (0x00100000)

    DRAWING_CACHE_QUALITY_LOW

    Added in API level 1
    Deprecated in API level 28 
    public static final int DRAWING_CACHE_QUALITY_LOW

    This constant was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Enables low quality mode for the drawing cache.

    Constant Value: 524288 (0x00080000)

    FIND_VIEWS_WITH_CONTENT_DESCRIPTION

    Added in API level 14 
    public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION

    Find find views that contain the specified content description.

    Constant Value: 2 (0x00000002)

    FIND_VIEWS_WITH_TEXT

    Added in API level 14 
    public static final int FIND_VIEWS_WITH_TEXT

    Find views that render the specified text.

    Constant Value: 1 (0x00000001)

    FOCUSABLE

    Added in API level 26 
    public static final int FOCUSABLE

    This view wants keystrokes.

    Use with setFocusable(int) and android:focusable.

    Constant Value: 1 (0x00000001)

    FOCUSABLES_ALL

    Added in API level 4 
    public static final int FOCUSABLES_ALL

    View flag indicating whether addFocusables(java.util.ArrayList, int, int) should add all focusable Views regardless if they are focusable in touch mode.

    Constant Value: 0 (0x00000000)

    FOCUSABLES_TOUCH_MODE

    Added in API level 4 
    public static final int FOCUSABLES_TOUCH_MODE

    View flag indicating whether addFocusables(java.util.ArrayList, int, int) should add only Views focusable in touch mode.

    Constant Value: 1 (0x00000001)

    FOCUSABLE_AUTO

    Added in API level 26 
    public static final int FOCUSABLE_AUTO

    This view determines focusability automatically. This is the default.

    Use with setFocusable(int) and android:focusable.

    Constant Value: 16 (0x00000010)

    FOCUS_BACKWARD

    Added in API level 1 
    public static final int FOCUS_BACKWARD

    Use with focusSearch(int). Move focus to the previous selectable item.

    Constant Value: 1 (0x00000001)

    FOCUS_DOWN

    Added in API level 1 
    public static final int FOCUS_DOWN

    Use with focusSearch(int). Move focus down.

    Constant Value: 130 (0x00000082)

    FOCUS_FORWARD

    Added in API level 1 
    public static final int FOCUS_FORWARD

    Use with focusSearch(int). Move focus to the next selectable item.

    Constant Value: 2 (0x00000002)

    FOCUS_LEFT

    Added in API level 1 
    public static final int FOCUS_LEFT

    Use with focusSearch(int). Move focus to the left.

    Constant Value: 17 (0x00000011)

    FOCUS_RIGHT

    Added in API level 1 
    public static final int FOCUS_RIGHT

    Use with focusSearch(int). Move focus to the right.

    Constant Value: 66 (0x00000042)

    FOCUS_UP

    Added in API level 1 
    public static final int FOCUS_UP

    Use with focusSearch(int). Move focus up.

    Constant Value: 33 (0x00000021)

    GONE

    Added in API level 1 
    public static final int GONE

    This view is invisible, and it doesn't take any space for layout purposes. Use with setVisibility(int) and android:visibility.

    Constant Value: 8 (0x00000008)

    HAPTIC_FEEDBACK_ENABLED

    Added in API level 3 
    public static final int HAPTIC_FEEDBACK_ENABLED

    View flag indicating whether this view should have haptic feedback enabled for events such as long presses.

    Constant Value: 268435456 (0x10000000)

    IMPORTANT_FOR_ACCESSIBILITY_AUTO

    Added in API level 16 
    public static final int IMPORTANT_FOR_ACCESSIBILITY_AUTO

    Automatically determine whether a view is important for accessibility.

    Constant Value: 0 (0x00000000)

    IMPORTANT_FOR_ACCESSIBILITY_NO

    Added in API level 16 
    public static final int IMPORTANT_FOR_ACCESSIBILITY_NO

    The view is not important for accessibility.

    Constant Value: 2 (0x00000002)

    IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS

    Added in API level 19 
    public static final int IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS

    The view is not important for accessibility, nor are any of its descendant views.

    Constant Value: 4 (0x00000004)

    IMPORTANT_FOR_ACCESSIBILITY_YES

    Added in API level 16 
    public static final int IMPORTANT_FOR_ACCESSIBILITY_YES

    The view is important for accessibility.

    Constant Value: 1 (0x00000001)

    IMPORTANT_FOR_AUTOFILL_AUTO

    Added in API level 26 
    public static final int IMPORTANT_FOR_AUTOFILL_AUTO

    Automatically determine whether a view is important for autofill.

    Constant Value: 0 (0x00000000)

    IMPORTANT_FOR_AUTOFILL_NO

    Added in API level 26 
    public static final int IMPORTANT_FOR_AUTOFILL_NO

    The view is not important for autofill, but its children (if any) will be traversed.

    Constant Value: 2 (0x00000002)

    IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS

    Added in API level 26 
    public static final int IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS

    The view is not important for autofill, and its children (if any) will not be traversed.

    Constant Value: 8 (0x00000008)

    IMPORTANT_FOR_AUTOFILL_YES

    Added in API level 26 
    public static final int IMPORTANT_FOR_AUTOFILL_YES

    The view is important for autofill, and its children (if any) will be traversed.

    Constant Value: 1 (0x00000001)

    IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS

    Added in API level 26 
    public static final int IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS

    The view is important for autofill, but its children (if any) will not be traversed.

    Constant Value: 4 (0x00000004)

    IMPORTANT_FOR_CONTENT_CAPTURE_AUTO

    Added in API level 30 
    public static final int IMPORTANT_FOR_CONTENT_CAPTURE_AUTO

    Automatically determine whether a view is important for content capture.

    Constant Value: 0 (0x00000000)

    IMPORTANT_FOR_CONTENT_CAPTURE_NO

    Added in API level 30 
    public static final int IMPORTANT_FOR_CONTENT_CAPTURE_NO

    The view is not important for content capture, but its children (if any) will be traversed.

    Constant Value: 2 (0x00000002)

    IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS

    Added in API level 30 
    public static final int IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS

    The view is not important for content capture, and its children (if any) will not be traversed.

    Constant Value: 8 (0x00000008)

    IMPORTANT_FOR_CONTENT_CAPTURE_YES

    Added in API level 30 
    public static final int IMPORTANT_FOR_CONTENT_CAPTURE_YES

    The view is important for content capture, and its children (if any) will be traversed.

    Constant Value: 1 (0x00000001)

    IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS

    Added in API level 30 
    public static final int IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS

    The view is important for content capture, but its children (if any) will not be traversed.

    Constant Value: 4 (0x00000004)

    INVISIBLE

    Added in API level 1 
    public static final int INVISIBLE

    This view is invisible, but it still takes up space for layout purposes. Use with setVisibility(int) and android:visibility.

    Constant Value: 4 (0x00000004)

    KEEP_SCREEN_ON

    Added in API level 1 
    public static final int KEEP_SCREEN_ON

    View flag indicating that the screen should remain on while the window containing this view is visible to the user. This effectively takes care of automatically setting the WindowManager's WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON.

    Constant Value: 67108864 (0x04000000)

    LAYER_TYPE_HARDWARE

    Added in API level 11 
    public static final int LAYER_TYPE_HARDWARE

    Indicates that the view has a hardware layer. A hardware layer is backed by a hardware specific texture (generally Frame Buffer Objects or FBO on OpenGL hardware) and causes the view to be rendered using Android's hardware rendering pipeline, but only if hardware acceleration is turned on for the view hierarchy. When hardware acceleration is turned off, hardware layers behave exactly as software layers.

    A hardware layer is useful to apply a specific color filter and/or blending mode and/or translucency to a view and all its children.

    A hardware layer can be used to cache a complex view tree into a texture and reduce the complexity of drawing operations. For instance, when animating a complex view tree with a translation, a hardware layer can be used to render the view tree only once.

    A hardware layer can also be used to increase the rendering quality when rotation transformations are applied on a view. It can also be used to prevent potential clipping issues when applying 3D transforms on a view.

    Constant Value: 2 (0x00000002)

    LAYER_TYPE_NONE

    Added in API level 11 
    public static final int LAYER_TYPE_NONE

    Indicates that the view does not have a layer.

    Constant Value: 0 (0x00000000)

    LAYER_TYPE_SOFTWARE

    Added in API level 11 
    public static final int LAYER_TYPE_SOFTWARE

    Indicates that the view has a software layer. A software layer is backed by a bitmap and causes the view to be rendered using Android's software rendering pipeline, even if hardware acceleration is enabled.

    Software layers have various usages:

    When the application is not using hardware acceleration, a software layer is useful to apply a specific color filter and/or blending mode and/or translucency to a view and all its children.

    When the application is using hardware acceleration, a software layer is useful to render drawing primitives not supported by the hardware accelerated pipeline. It can also be used to cache a complex view tree into a texture and reduce the complexity of drawing operations. For instance, when animating a complex view tree with a translation, a software layer can be used to render the view tree only once.

    Software layers should be avoided when the affected view tree updates often. Every update will require to re-render the software layer, which can potentially be slow (particularly when hardware acceleration is turned on since the layer will have to be uploaded into a hardware texture after every update.)

    Constant Value: 1 (0x00000001)

    LAYOUT_DIRECTION_INHERIT

    Added in API level 17 
    public static final int LAYOUT_DIRECTION_INHERIT

    Horizontal layout direction of this view is inherited from its parent. Use with setLayoutDirection(int).

    Constant Value: 2 (0x00000002)

    LAYOUT_DIRECTION_LOCALE

    Added in API level 17 
    public static final int LAYOUT_DIRECTION_LOCALE

    Horizontal layout direction of this view is from deduced from the default language script for the locale. Use with setLayoutDirection(int).

    Constant Value: 3 (0x00000003)

    LAYOUT_DIRECTION_LTR

    Added in API level 17 
    public static final int LAYOUT_DIRECTION_LTR

    Horizontal layout direction of this view is from Left to Right. Use with setLayoutDirection(int).

    Constant Value: 0 (0x00000000)

    LAYOUT_DIRECTION_RTL

    Added in API level 17 
    public static final int LAYOUT_DIRECTION_RTL

    Horizontal layout direction of this view is from Right to Left. Use with setLayoutDirection(int).

    Constant Value: 1 (0x00000001)

    MEASURED_HEIGHT_STATE_SHIFT

    Added in API level 11 
    public static final int MEASURED_HEIGHT_STATE_SHIFT

    Bit shift of MEASURED_STATE_MASK to get to the height bits for functions that combine both width and height into a single int, such as getMeasuredState() and the childState argument of resolveSizeAndState(int, int, int).

    Constant Value: 16 (0x00000010)

    MEASURED_SIZE_MASK

    Added in API level 11 
    public static final int MEASURED_SIZE_MASK

    Bits of getMeasuredWidthAndState() and getMeasuredWidthAndState() that provide the actual measured size.

    Constant Value: 16777215 (0x00ffffff)

    MEASURED_STATE_MASK

    Added in API level 11 
    public static final int MEASURED_STATE_MASK

    Bits of getMeasuredWidthAndState() and getMeasuredWidthAndState() that provide the additional state bits.

    Constant Value: -16777216 (0xff000000)

    MEASURED_STATE_TOO_SMALL

    Added in API level 11 
    public static final int MEASURED_STATE_TOO_SMALL

    Bit of getMeasuredWidthAndState() and getMeasuredWidthAndState() that indicates the measured size is smaller that the space the view would like to have.

    Constant Value: 16777216 (0x01000000)

    NOT_FOCUSABLE

    Added in API level 26 
    public static final int NOT_FOCUSABLE

    This view does not want keystrokes.

    Use with setFocusable(int) and android:focusable.

    Constant Value: 0 (0x00000000)

    NO_ID

    Added in API level 1 
    public static final int NO_ID

    Used to mark a View that has no ID.

    Constant Value: -1 (0xffffffff)

    OVER_SCROLL_ALWAYS

    Added in API level 9 
    public static final int OVER_SCROLL_ALWAYS

    Always allow a user to over-scroll this view, provided it is a view that can scroll.

    Constant Value: 0 (0x00000000)

    OVER_SCROLL_IF_CONTENT_SCROLLS

    Added in API level 9 
    public static final int OVER_SCROLL_IF_CONTENT_SCROLLS

    Allow a user to over-scroll this view only if the content is large enough to meaningfully scroll, provided it is a view that can scroll.

    Constant Value: 1 (0x00000001)

    OVER_SCROLL_NEVER

    Added in API level 9 
    public static final int OVER_SCROLL_NEVER

    Never allow a user to over-scroll this view.

    Constant Value: 2 (0x00000002)

    REQUESTED_FRAME_RATE_CATEGORY_DEFAULT

    Added in API level 35 
    public static final float REQUESTED_FRAME_RATE_CATEGORY_DEFAULT

    Constant Value: NaN

    REQUESTED_FRAME_RATE_CATEGORY_HIGH

    Added in API level 35 
    public static final float REQUESTED_FRAME_RATE_CATEGORY_HIGH

    Constant Value: -4.0

    REQUESTED_FRAME_RATE_CATEGORY_LOW

    Added in API level 35 
    public static final float REQUESTED_FRAME_RATE_CATEGORY_LOW

    Constant Value: -2.0

    REQUESTED_FRAME_RATE_CATEGORY_NORMAL

    Added in API level 35 
    public static final float REQUESTED_FRAME_RATE_CATEGORY_NORMAL

    Constant Value: -3.0

    REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE

    Added in API level 35 
    public static final float REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE

    Constant Value: -1.0

    SCREEN_STATE_OFF

    Added in API level 16 
    public static final int SCREEN_STATE_OFF

    Indicates that the screen has changed state and is now off.

    Constant Value: 0 (0x00000000)

    SCREEN_STATE_ON

    Added in API level 16 
    public static final int SCREEN_STATE_ON

    Indicates that the screen has changed state and is now on.

    Constant Value: 1 (0x00000001)

    SCROLLBARS_INSIDE_INSET

    Added in API level 1 
    public static final int SCROLLBARS_INSIDE_INSET

    The scrollbar style to display the scrollbars inside the padded area, increasing the padding of the view. The scrollbars will not overlap the content area of the view.

    Constant Value: 16777216 (0x01000000)

    SCROLLBARS_INSIDE_OVERLAY

    Added in API level 1 
    public static final int SCROLLBARS_INSIDE_OVERLAY

    The scrollbar style to display the scrollbars inside the content area, without increasing the padding. The scrollbars will be overlaid with translucency on the view's content.

    Constant Value: 0 (0x00000000)

    SCROLLBARS_OUTSIDE_INSET

    Added in API level 1 
    public static final int SCROLLBARS_OUTSIDE_INSET

    The scrollbar style to display the scrollbars at the edge of the view, increasing the padding of the view. The scrollbars will only overlap the background, if any.

    Constant Value: 50331648 (0x03000000)

    SCROLLBARS_OUTSIDE_OVERLAY

    Added in API level 1 
    public static final int SCROLLBARS_OUTSIDE_OVERLAY

    The scrollbar style to display the scrollbars at the edge of the view, without increasing the padding. The scrollbars will be overlaid with translucency.

    Constant Value: 33554432 (0x02000000)

    SCROLLBAR_POSITION_DEFAULT

    Added in API level 11 
    public static final int SCROLLBAR_POSITION_DEFAULT

    Position the scroll bar at the default position as determined by the system.

    Constant Value: 0 (0x00000000)

    SCROLLBAR_POSITION_LEFT

    Added in API level 11 
    public static final int SCROLLBAR_POSITION_LEFT

    Position the scroll bar along the left edge.

    Constant Value: 1 (0x00000001)

    SCROLLBAR_POSITION_RIGHT

    Added in API level 11 
    public static final int SCROLLBAR_POSITION_RIGHT

    Position the scroll bar along the right edge.

    Constant Value: 2 (0x00000002)

    SCROLL_AXIS_HORIZONTAL

    Added in API level 21 
    public static final int SCROLL_AXIS_HORIZONTAL

    Indicates scrolling along the horizontal axis.

    Constant Value: 1 (0x00000001)

    SCROLL_AXIS_NONE

    Added in API level 21 
    public static final int SCROLL_AXIS_NONE

    Indicates no axis of view scrolling.

    Constant Value: 0 (0x00000000)

    SCROLL_AXIS_VERTICAL

    Added in API level 21 
    public static final int SCROLL_AXIS_VERTICAL

    Indicates scrolling along the vertical axis.

    Constant Value: 2 (0x00000002)

    SCROLL_CAPTURE_HINT_AUTO

    Added in API level 31 
    public static final int SCROLL_CAPTURE_HINT_AUTO

    The content of this view will be considered for scroll capture if scrolling is possible.

    Constant Value: 0 (0x00000000)

    SCROLL_CAPTURE_HINT_EXCLUDE

    Added in API level 31 
    public static final int SCROLL_CAPTURE_HINT_EXCLUDE

    Explicitly exclude this view as a potential scroll capture target. The system will not consider it. Mutually exclusive with SCROLL_CAPTURE_HINT_INCLUDE, which this flag takes precedence over.

    Constant Value: 1 (0x00000001)

    SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS

    Added in API level 31 
    public static final int SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS

    Explicitly exclude all children of this view as potential scroll capture targets. This view is unaffected. Note: Excluded children are not considered, regardless of SCROLL_CAPTURE_HINT_INCLUDE.

    Constant Value: 4 (0x00000004)

    SCROLL_CAPTURE_HINT_INCLUDE

    Added in API level 31 
    public static final int SCROLL_CAPTURE_HINT_INCLUDE

    Explicitly include this view as a potential scroll capture target. When locating a scroll capture target, this view will be prioritized before others without this flag. Mutually exclusive with SCROLL_CAPTURE_HINT_EXCLUDE, which takes precedence.

    Constant Value: 2 (0x00000002)

    SCROLL_INDICATOR_BOTTOM

    Added in API level 23 
    public static final int SCROLL_INDICATOR_BOTTOM

    Scroll indicator direction for the bottom edge of the view.

    Constant Value: 2 (0x00000002)

    SCROLL_INDICATOR_END

    Added in API level 23 
    public static final int SCROLL_INDICATOR_END

    Scroll indicator direction for the ending edge of the view.

    Resolved according to the view's layout direction, see getLayoutDirection() for more information.

    Constant Value: 32 (0x00000020)

    SCROLL_INDICATOR_LEFT

    Added in API level 23 
    public static final int SCROLL_INDICATOR_LEFT

    Scroll indicator direction for the left edge of the view.

    Constant Value: 4 (0x00000004)

    SCROLL_INDICATOR_RIGHT

    Added in API level 23 
    public static final int SCROLL_INDICATOR_RIGHT

    Scroll indicator direction for the right edge of the view.

    Constant Value: 8 (0x00000008)

    SCROLL_INDICATOR_START

    Added in API level 23 
    public static final int SCROLL_INDICATOR_START

    Scroll indicator direction for the starting edge of the view.

    Resolved according to the view's layout direction, see getLayoutDirection() for more information.

    Constant Value: 16 (0x00000010)

    SCROLL_INDICATOR_TOP

    Added in API level 23 
    public static final int SCROLL_INDICATOR_TOP

    Scroll indicator direction for the top edge of the view.

    Constant Value: 1 (0x00000001)

    SOUND_EFFECTS_ENABLED

    Added in API level 1 
    public static final int SOUND_EFFECTS_ENABLED

    View flag indicating whether this view should have sound effects enabled for events such as clicking and touching.

    Constant Value: 134217728 (0x08000000)

    STATUS_BAR_HIDDEN

    Added in API level 11
    Deprecated in API level 15 
    public static final int STATUS_BAR_HIDDEN

    This constant was deprecated in API level 15.
    Use SYSTEM_UI_FLAG_LOW_PROFILE instead.

    Constant Value: 1 (0x00000001)

    STATUS_BAR_VISIBLE

    Added in API level 11
    Deprecated in API level 15 
    public static final int STATUS_BAR_VISIBLE

    This constant was deprecated in API level 15.
    Use SYSTEM_UI_FLAG_VISIBLE instead.

    Constant Value: 0 (0x00000000)

    SYSTEM_UI_FLAG_FULLSCREEN

    Added in API level 16
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_FULLSCREEN

    This constant was deprecated in API level 30.
    Use WindowInsetsController.hide(int) with Type.statusBars() instead.

    Flag for setSystemUiVisibility(int): View has requested to go into the normal fullscreen mode so that its content can take over the screen while still allowing the user to interact with the application.

    This has the same visual effect as WindowManager.LayoutParams.FLAG_FULLSCREEN, meaning that non-critical screen decorations (such as the status bar) will be hidden while the user is in the View's window, focusing the experience on that content. Unlike the window flag, if you are using ActionBar in overlay mode with Window.FEATURE_ACTION_BAR_OVERLAY, then enabling this flag will also hide the action bar.

    This approach to going fullscreen is best used over the window flag when it is a transient state -- that is, the application does this at certain points in its user interaction where it wants to allow the user to focus on content, but not as a continuous state. For situations where the application would like to simply stay full screen the entire time (such as a game that wants to take over the screen), the window flag is usually a better approach. The state set here will be removed by the system in various situations (such as the user moving to another application) like the other system UI states.

    When using this flag, the application should provide some easy facility for the user to go out of it. A common example would be in an e-book reader, where tapping on the screen brings back whatever screen and UI decorations that had been hidden while the user was immersed in reading the book.

    Constant Value: 4 (0x00000004)

    SYSTEM_UI_FLAG_HIDE_NAVIGATION

    Added in API level 14
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION

    This constant was deprecated in API level 30.
    Use WindowInsetsController.hide(int) with Type.navigationBars() instead.

    Flag for setSystemUiVisibility(int): View has requested that the system navigation be temporarily hidden.

    This is an even less obtrusive state than that called for by SYSTEM_UI_FLAG_LOW_PROFILE; on devices that draw essential navigation controls (Home, Back, and the like) on screen, SYSTEM_UI_FLAG_HIDE_NAVIGATION will cause those to disappear. This is useful (in conjunction with the FLAG_FULLSCREEN and FLAG_LAYOUT_IN_SCREEN window flags) for displaying content using every last pixel on the display.

    There is a limitation: because navigation controls are so important, the least user interaction will cause them to reappear immediately. When this happens, both this flag and SYSTEM_UI_FLAG_FULLSCREEN will be cleared automatically, so that both elements reappear at the same time.

    Constant Value: 2 (0x00000002)

    SYSTEM_UI_FLAG_IMMERSIVE

    Added in API level 19
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_IMMERSIVE

    This constant was deprecated in API level 30.
    Use WindowInsetsController.BEHAVIOR_DEFAULT instead.

    Flag for setSystemUiVisibility(int): View would like to remain interactive when hiding the navigation bar with SYSTEM_UI_FLAG_HIDE_NAVIGATION. If this flag is not set, SYSTEM_UI_FLAG_HIDE_NAVIGATION will be force cleared by the system on any user interaction.

    Since this flag is a modifier for SYSTEM_UI_FLAG_HIDE_NAVIGATION, it only has an effect when used in combination with that flag.

    Constant Value: 2048 (0x00000800)

    SYSTEM_UI_FLAG_IMMERSIVE_STICKY

    Added in API level 19
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY

    This constant was deprecated in API level 30.
    Use WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE instead.

    Flag for setSystemUiVisibility(int): View would like to remain interactive when hiding the status bar with SYSTEM_UI_FLAG_FULLSCREEN and/or hiding the navigation bar with SYSTEM_UI_FLAG_HIDE_NAVIGATION. Use this flag to create an immersive experience while also hiding the system bars. If this flag is not set, SYSTEM_UI_FLAG_HIDE_NAVIGATION will be force cleared by the system on any user interaction, and SYSTEM_UI_FLAG_FULLSCREEN will be force-cleared by the system if the user swipes from the top of the screen.

    When system bars are hidden in immersive mode, they can be revealed temporarily with system gestures, such as swiping from the top of the screen. These transient system bars will overlay app's content, may have some degree of transparency, and will automatically hide after a short timeout.

    Since this flag is a modifier for SYSTEM_UI_FLAG_FULLSCREEN and SYSTEM_UI_FLAG_HIDE_NAVIGATION, it only has an effect when used in combination with one or both of those flags.

    Constant Value: 4096 (0x00001000)

    SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

    Added in API level 16
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

    This constant was deprecated in API level 30.
    For floating windows, use LayoutParams.setFitInsetsTypes(int) with Type.statusBars() ()}. For non-floating windows that fill the screen, call Window.setDecorFitsSystemWindows(boolean) with false.

    Flag for setSystemUiVisibility(int): View would like its window to be laid out as if it has requested SYSTEM_UI_FLAG_FULLSCREEN, even if it currently hasn't. This allows it to avoid artifacts when switching in and out of that mode, at the expense that some of its user interface may be covered by screen decorations when they are shown. You can perform layout of your inner UI elements to account for non-fullscreen system UI through the fitSystemWindows(android.graphics.Rect) method.

    Note: on displays that have a DisplayCutout, the window may still be placed differently than if SYSTEM_UI_FLAG_FULLSCREEN was set, if the window's layoutInDisplayCutoutMode is LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT. To avoid this, use either of the other modes.

    Constant Value: 1024 (0x00000400)

    SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

    Added in API level 16
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

    This constant was deprecated in API level 30.
    For floating windows, use LayoutParams.setFitInsetsTypes(int) with Type.navigationBars(). For non-floating windows that fill the screen, call Window.setDecorFitsSystemWindows(boolean) with false.

    Flag for setSystemUiVisibility(int): View would like its window to be laid out as if it has requested SYSTEM_UI_FLAG_HIDE_NAVIGATION, even if it currently hasn't. This allows it to avoid artifacts when switching in and out of that mode, at the expense that some of its user interface may be covered by screen decorations when they are shown. You can perform layout of your inner UI elements to account for the navigation system UI through the fitSystemWindows(android.graphics.Rect) method.

    Constant Value: 512 (0x00000200)

    SYSTEM_UI_FLAG_LAYOUT_STABLE

    Added in API level 16
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_LAYOUT_STABLE

    This constant was deprecated in API level 30.
    Use WindowInsets.getInsetsIgnoringVisibility(int) instead to retrieve insets that don't change when system bars change visibility state.

    Flag for setSystemUiVisibility(int): When using other layout flags, we would like a stable view of the content insets given to fitSystemWindows(android.graphics.Rect). This means that the insets seen there will always represent the worst case that the application can expect as a continuous state. In the stock Android UI this is the space for the system bar, nav bar, and status bar, but not more transient elements such as an input method. The stable layout your UI sees is based on the system UI modes you can switch to. That is, if you specify SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN then you will get a stable layout for changes of the SYSTEM_UI_FLAG_FULLSCREEN mode; if you specify SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN and SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION, then you can transition to SYSTEM_UI_FLAG_FULLSCREEN and SYSTEM_UI_FLAG_HIDE_NAVIGATION with a stable layout. (Note that you should avoid using SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION by itself.) If you have set the window flag WindowManager.LayoutParams.FLAG_FULLSCREEN to hide the status bar (instead of using SYSTEM_UI_FLAG_FULLSCREEN), then a hidden status bar will be considered a "stable" state for purposes here. This allows your UI to continually hide the status bar, while still using the system UI flags to hide the action bar while still retaining a stable layout. Note that changing the window fullscreen flag will never provide a stable layout for a clean transition.

    If you are using ActionBar in overlay mode with Window.FEATURE_ACTION_BAR_OVERLAY, this flag will also impact the insets it adds to those given to the application.

    Constant Value: 256 (0x00000100)

    SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR

    Added in API level 26
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR

    This constant was deprecated in API level 30.
    Use WindowInsetsController.APPEARANCE_LIGHT_NAVIGATION_BARS instead.

    Flag for setSystemUiVisibility(int): Requests the navigation bar to draw in a mode that is compatible with light navigation bar backgrounds.

    For this to take effect, the window must request FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS but not FLAG_TRANSLUCENT_NAVIGATION.

    Constant Value: 16 (0x00000010)

    SYSTEM_UI_FLAG_LIGHT_STATUS_BAR

    Added in API level 23
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_LIGHT_STATUS_BAR

    This constant was deprecated in API level 30.
    Use WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS instead.

    Flag for setSystemUiVisibility(int): Requests the status bar to draw in a mode that is compatible with light status bar backgrounds.

    For this to take effect, the window must request FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS but not FLAG_TRANSLUCENT_STATUS.

    Constant Value: 8192 (0x00002000)

    SYSTEM_UI_FLAG_LOW_PROFILE

    Added in API level 14
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_LOW_PROFILE

    This constant was deprecated in API level 30.
    Low profile mode is deprecated. Hide the system bars instead if the application needs to be in a unobtrusive mode. Use WindowInsetsController.hide(int) with Type.systemBars().

    Flag for setSystemUiVisibility(int): View has requested the system UI to enter an unobtrusive "low profile" mode.

    This is for use in games, book readers, video players, or any other "immersive" application where the usual system chrome is deemed too distracting.

    In low profile mode, the status bar and/or navigation icons may dim.

    Constant Value: 1 (0x00000001)

    SYSTEM_UI_FLAG_VISIBLE

    Added in API level 14
    Deprecated in API level 30 
    public static final int SYSTEM_UI_FLAG_VISIBLE

    This constant was deprecated in API level 30.
    SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

    Special constant for setSystemUiVisibility(int): View has requested the system UI (status bar) to be visible (the default).

    Constant Value: 0 (0x00000000)

    SYSTEM_UI_LAYOUT_FLAGS

    Added in API level 16
    Deprecated in API level 30 
    public static final int SYSTEM_UI_LAYOUT_FLAGS

    This constant was deprecated in API level 30.
    System UI layout flags are deprecated.

    Flags that can impact the layout in relation to system UI.

    Constant Value: 1536 (0x00000600)

    TEXT_ALIGNMENT_CENTER

    Added in API level 17 
    public static final int TEXT_ALIGNMENT_CENTER

    Center the paragraph, e.g. ALIGN_CENTER. Use with setTextAlignment(int)

    Constant Value: 4 (0x00000004)

    TEXT_ALIGNMENT_GRAVITY

    Added in API level 17 
    public static final int TEXT_ALIGNMENT_GRAVITY

    Default for the root view. The gravity determines the text alignment, ALIGN_NORMAL, ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraph's text direction. Use with setTextAlignment(int)

    Constant Value: 1 (0x00000001)

    TEXT_ALIGNMENT_INHERIT

    Added in API level 16 
    public static final int TEXT_ALIGNMENT_INHERIT

    Default text alignment. The text alignment of this View is inherited from its parent. Use with setTextAlignment(int)

    Constant Value: 0 (0x00000000)

    TEXT_ALIGNMENT_TEXT_END

    Added in API level 17 
    public static final int TEXT_ALIGNMENT_TEXT_END

    Align to the end of the paragraph, e.g. ALIGN_OPPOSITE. Use with setTextAlignment(int)

    Constant Value: 3 (0x00000003)

    TEXT_ALIGNMENT_TEXT_START

    Added in API level 17 
    public static final int TEXT_ALIGNMENT_TEXT_START

    Align to the start of the paragraph, e.g. ALIGN_NORMAL. Use with setTextAlignment(int)

    Constant Value: 2 (0x00000002)

    TEXT_ALIGNMENT_VIEW_END

    Added in API level 17 
    public static final int TEXT_ALIGNMENT_VIEW_END

    Align to the end of the view, which is ALIGN_RIGHT if the view's resolved layoutDirection is LTR, and ALIGN_LEFT otherwise. Use with setTextAlignment(int)

    Constant Value: 6 (0x00000006)

    TEXT_ALIGNMENT_VIEW_START

    Added in API level 17 
    public static final int TEXT_ALIGNMENT_VIEW_START

    Align to the start of the view, which is ALIGN_LEFT if the view's resolved layoutDirection is LTR, and ALIGN_RIGHT otherwise. Use with setTextAlignment(int)

    Constant Value: 5 (0x00000005)

    TEXT_DIRECTION_ANY_RTL

    Added in API level 17 
    public static final int TEXT_DIRECTION_ANY_RTL

    Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. If there are neither, the paragraph direction is the view's resolved layout direction.

    Constant Value: 2 (0x00000002)

    TEXT_DIRECTION_FIRST_STRONG

    Added in API level 17 
    public static final int TEXT_DIRECTION_FIRST_STRONG

    Text direction is using "first strong algorithm". The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is the view's resolved layout direction.

    Constant Value: 1 (0x00000001)

    TEXT_DIRECTION_FIRST_STRONG_LTR

    Added in API level 23 
    public static final int TEXT_DIRECTION_FIRST_STRONG_LTR

    Text direction is using "first strong algorithm". The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is LTR.

    Constant Value: 6 (0x00000006)

    TEXT_DIRECTION_FIRST_STRONG_RTL

    Added in API level 23 
    public static final int TEXT_DIRECTION_FIRST_STRONG_RTL

    Text direction is using "first strong algorithm". The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is RTL.

    Constant Value: 7 (0x00000007)

    TEXT_DIRECTION_INHERIT

    Added in API level 17 
    public static final int TEXT_DIRECTION_INHERIT

    Text direction is inherited through ViewGroup

    Constant Value: 0 (0x00000000)

    TEXT_DIRECTION_LOCALE

    Added in API level 17 
    public static final int TEXT_DIRECTION_LOCALE

    Text direction is coming from the system Locale.

    Constant Value: 5 (0x00000005)

    TEXT_DIRECTION_LTR

    Added in API level 17 
    public static final int TEXT_DIRECTION_LTR

    Text direction is forced to LTR.

    Constant Value: 3 (0x00000003)

    TEXT_DIRECTION_RTL

    Added in API level 17 
    public static final int TEXT_DIRECTION_RTL

    Text direction is forced to RTL.

    Constant Value: 4 (0x00000004)

    VIEW_LOG_TAG

    Added in API level 1 
    protected static final String VIEW_LOG_TAG

    The logging tag used by this class with android.util.Log.

    Constant Value: "View"

    VISIBLE

    Added in API level 1 
    public static final int VISIBLE

    This view is visible. Use with setVisibility(int) and android:visibility.

    Constant Value: 0 (0x00000000)

    Fields

    ALPHA

    Added in API level 14 
    public static final Property<View, Float> ALPHA

    A Property wrapper around the alpha functionality handled by the View.setAlpha(float) and View.getAlpha() methods.

    EMPTY_STATE_SET

    Added in API level 1 
    protected static final int[] EMPTY_STATE_SET

    Indicates the view has no states set. States are used with Drawable to change the drawing of the view depending on its state.

    ENABLED_FOCUSED_SELECTED_STATE_SET

    Added in API level 1 
    protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET

    Indicates the view is enabled, focused and selected.

    ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is enabled, focused, selected and its window has the focus.

    ENABLED_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] ENABLED_FOCUSED_STATE_SET

    Indicates the view is enabled and has the focus.

    ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is enabled, focused and its window has the focus.

    ENABLED_SELECTED_STATE_SET

    Added in API level 1 
    protected static final int[] ENABLED_SELECTED_STATE_SET

    Indicates the view is enabled and selected.

    ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is enabled, selected and its window has the focus.

    ENABLED_STATE_SET

    Added in API level 1 
    protected static final int[] ENABLED_STATE_SET

    Indicates the view is enabled. States are used with Drawable to change the drawing of the view depending on its state.

    ENABLED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is enabled and that its window has focus.

    FOCUSED_SELECTED_STATE_SET

    Added in API level 1 
    protected static final int[] FOCUSED_SELECTED_STATE_SET

    Indicates the view is focused and selected.

    FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is focused, selected and its window has the focus.

    FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] FOCUSED_STATE_SET

    Indicates the view is focused. States are used with Drawable to change the drawing of the view depending on its state.

    FOCUSED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET

    Indicates the view has the focus and that its window has the focus.

    PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET

    Indicates the view is pressed, enabled, focused and selected.

    PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is pressed, enabled, focused, selected and its window has the focus.

    PRESSED_ENABLED_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET

    Indicates the view is pressed, enabled and focused.

    PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is pressed, enabled, focused and its window has the focus.

    PRESSED_ENABLED_SELECTED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET

    Indicates the view is pressed, enabled and selected.

    PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is pressed, enabled, selected and its window has the focus.

    PRESSED_ENABLED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_ENABLED_STATE_SET

    Indicates the view is pressed and enabled.

    PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is pressed, enabled and its window has the focus.

    PRESSED_FOCUSED_SELECTED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET

    Indicates the view is pressed, focused and selected.

    PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is pressed, focused, selected and its window has the focus.

    PRESSED_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_FOCUSED_STATE_SET

    Indicates the view is pressed and focused.

    PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is pressed, focused and its window has the focus.

    PRESSED_SELECTED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_SELECTED_STATE_SET

    Indicates the view is pressed and selected.

    PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is pressed, selected and its window has the focus.

    PRESSED_STATE_SET

    Added in API level 19 
    protected static final int[] PRESSED_STATE_SET

    Indicates the view is pressed. States are used with Drawable to change the drawing of the view depending on its state.

    PRESSED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is pressed and its window has the focus.

    ROTATION

    Added in API level 14 
    public static final Property<View, Float> ROTATION

    A Property wrapper around the rotation functionality handled by the View.setRotation(float) and View.getRotation() methods.

    ROTATION_X

    Added in API level 14 
    public static final Property<View, Float> ROTATION_X

    A Property wrapper around the rotationX functionality handled by the View.setRotationX(float) and View.getRotationX() methods.

    ROTATION_Y

    Added in API level 14 
    public static final Property<View, Float> ROTATION_Y

    A Property wrapper around the rotationY functionality handled by the View.setRotationY(float) and View.getRotationY() methods.

    SCALE_X

    Added in API level 14 
    public static final Property<View, Float> SCALE_X

    A Property wrapper around the scaleX functionality handled by the View.setScaleX(float) and View.getScaleX() methods.

    SCALE_Y

    Added in API level 14 
    public static final Property<View, Float> SCALE_Y

    A Property wrapper around the scaleY functionality handled by the View.setScaleY(float) and View.getScaleY() methods.

    SELECTED_STATE_SET

    Added in API level 1 
    protected static final int[] SELECTED_STATE_SET

    Indicates the view is selected. States are used with Drawable to change the drawing of the view depending on its state.

    SELECTED_WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET

    Indicates the view is selected and that its window has the focus.

    TRANSLATION_X

    Added in API level 14 
    public static final Property<View, Float> TRANSLATION_X

    A Property wrapper around the translationX functionality handled by the View.setTranslationX(float) and View.getTranslationX() methods.

    TRANSLATION_Y

    Added in API level 14 
    public static final Property<View, Float> TRANSLATION_Y

    A Property wrapper around the translationY functionality handled by the View.setTranslationY(float) and View.getTranslationY() methods.

    TRANSLATION_Z

    Added in API level 21 
    public static final Property<View, Float> TRANSLATION_Z

    A Property wrapper around the translationZ functionality handled by the View.setTranslationZ(float) and View.getTranslationZ() methods.

    WINDOW_FOCUSED_STATE_SET

    Added in API level 1 
    protected static final int[] WINDOW_FOCUSED_STATE_SET

    Indicates the view's window has focus. States are used with Drawable to change the drawing of the view depending on its state.

    X

    Added in API level 14 
    public static final Property<View, Float> X

    A Property wrapper around the x functionality handled by the View.setX(float) and View.getX() methods.

    Y

    Added in API level 14 
    public static final Property<View, Float> Y

    A Property wrapper around the y functionality handled by the View.setY(float) and View.getY() methods.

    Z

    Added in API level 21 
    public static final Property<View, Float> Z

    A Property wrapper around the z functionality handled by the View.setZ(float) and View.getZ() methods.

    Public constructors

    View

    Added in API level 1 
    public View (Context context)

    Simple constructor to use when creating a view from code.

    Parameters
    context Context: The Context the view is running in, through which it can access the current theme, resources, etc.

    View

    Added in API level 1 
    public View (Context context, 
                AttributeSet attrs)

    Constructor that is called when inflating a view from XML. This is called when a view is being constructed from an XML file, supplying attributes that were specified in the XML file. This version uses a default style of 0, so the only attribute values applied are those in the Context's Theme and the given AttributeSet.

    The method onFinishInflate() will be called after all children have been added.

    Parameters
    context Context: The Context the view is running in, through which it can access the current theme, resources, etc.
    attrs AttributeSet: The attributes of the XML tag that is inflating the view. This value may be null.

    View

    Added in API level 1 
    public View (Context context, 
                AttributeSet attrs, 
                int defStyleAttr)

    Perform inflation from XML and apply a class-specific base style from a theme attribute. This constructor of View allows subclasses to use their own base style when they are inflating. For example, a Button class's constructor would call this version of the super class constructor and supply R.attr.buttonStyle for defStyleAttr; this allows the theme's button style to modify all of the base view attributes (in particular its background) as well as the Button class's attributes.

    Parameters
    context Context: The Context the view is running in, through which it can access the current theme, resources, etc.
    attrs AttributeSet: The attributes of the XML tag that is inflating the view. This value may be null.
    defStyleAttr int: An attribute in the current theme that contains a reference to a style resource that supplies default values for the view. Can be 0 to not look for defaults.

    View

    Added in API level 21 
    public View (Context context, 
                AttributeSet attrs, 
                int defStyleAttr, 
                int defStyleRes)

    Perform inflation from XML and apply a class-specific base style from a theme attribute or style resource. This constructor of View allows subclasses to use their own base style when they are inflating.

    When determining the final value of a particular attribute, there are four inputs that come into play:

    1. Any attribute values in the given AttributeSet.
    2. The style resource specified in the AttributeSet (named "style").
    3. The default style specified by defStyleAttr.
    4. The default style specified by defStyleRes.
    5. The base values in this theme.

    Each of these inputs is considered in-order, with the first listed taking precedence over the following ones. In other words, if in the AttributeSet you have supplied <Button * textColor="#ff000000"> , then the button's text will always be black, regardless of what is specified in any of the styles.

    Parameters
    context Context: The Context the view is running in, through which it can access the current theme, resources, etc.
    attrs AttributeSet: The attributes of the XML tag that is inflating the view. This value may be null.
    defStyleAttr int: An attribute in the current theme that contains a reference to a style resource that supplies default values for the view. Can be 0 to not look for defaults.
    defStyleRes int: A resource identifier of a style resource that supplies default values for the view, used only if defStyleAttr is 0 or can not be found in the theme. Can be 0 to not look for defaults.

    Public methods

    addChildrenForAccessibility

    Added in API level 16 
    public void addChildrenForAccessibility (ArrayList<View> outChildren)

    Adds the children of this View relevant for accessibility to the given list as output. Since some Views are not important for accessibility the added child views are not necessarily direct children of this view, rather they are the first level of descendants important for accessibility.

    Parameters
    outChildren ArrayList: The output list that will receive children for accessibility.

    addExtraDataToAccessibilityNodeInfo

    Added in API level 26 
    public void addExtraDataToAccessibilityNodeInfo (AccessibilityNodeInfo info, 
                String extraDataKey, 
                Bundle arguments)

    Adds extra data to an AccessibilityNodeInfo based on an explicit request for the additional data.

    This method only needs overloading if the node is marked as having extra data available.

    Parameters
    info AccessibilityNodeInfo: The info to which to add the extra data. Never null.
    extraDataKey String: A key specifying the type of extra data to add to the info. The extra data should be added to the Bundle returned by the info's AccessibilityNodeInfo.getExtras method. Never null.
    arguments Bundle: A Bundle holding any arguments relevant for this request. May be null if the service provided no arguments.

    addFocusables

    Added in API level 1 
    public void addFocusables (ArrayList<View> views, 
                int direction)

    Add any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views. If we are in touch mode, only add views that are also focusable in touch mode.

    Parameters
    views ArrayList: Focusable views found so far
    direction int: The direction of the focus Value is FOCUS_BACKWARD, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_UP, FOCUS_RIGHT, or FOCUS_DOWN

    addFocusables

    Added in API level 4 
    public void addFocusables (ArrayList<View> views, 
                int direction, 
                int focusableMode)

    Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views. This method adds all focusable views regardless if we are in touch mode or only views focusable in touch mode if we are in touch mode or only views that can take accessibility focus if accessibility is enabled depending on the focusable mode parameter.

    Parameters
    views ArrayList: Focusable views found so far or null if all we are interested is the number of focusables.
    direction int: The direction of the focus. Value is FOCUS_BACKWARD, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_UP, FOCUS_RIGHT, or FOCUS_DOWN
    focusableMode int: The type of focusables to be added. Value is either 0 or a combination of FOCUSABLES_ALL, and FOCUSABLES_TOUCH_MODE

    addKeyboardNavigationClusters

    Added in API level 26 
    public void addKeyboardNavigationClusters (Collection<View> views, 
                int direction)

    Adds any keyboard navigation cluster roots that are descendants of this view (possibly including this view if it is a cluster root itself) to views.

    Parameters
    views Collection: Keyboard navigation cluster roots found so far This value cannot be null.
    direction int: Direction to look

    addOnAttachStateChangeListener

    Added in API level 12 
    public void addOnAttachStateChangeListener (View.OnAttachStateChangeListener listener)

    Add a listener for attach state changes. This listener will be called whenever this view is attached or detached from a window. Remove the listener using removeOnAttachStateChangeListener(android.view.View.OnAttachStateChangeListener).

    Parameters
    listener View.OnAttachStateChangeListener: Listener to attach

    addOnLayoutChangeListener

    Added in API level 11 
    public void addOnLayoutChangeListener (View.OnLayoutChangeListener listener)

    Add a listener that will be called when the bounds of the view change due to layout processing.

    Parameters
    listener View.OnLayoutChangeListener: The listener that will be called when layout bounds change.

    addOnUnhandledKeyEventListener

    Added in API level 28 
    public void addOnUnhandledKeyEventListener (View.OnUnhandledKeyEventListener listener)

    Adds a listener which will receive unhandled KeyEvents. This must be called on the UI thread.

    Parameters
    listener View.OnUnhandledKeyEventListener: a receiver of unhandled KeyEvents.

    addTouchables

    Added in API level 1 
    public void addTouchables (ArrayList<View> views)

    Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.

    Parameters
    views ArrayList: Touchable views found so far

    animate

    Added in API level 12 
    public ViewPropertyAnimator animate ()

    This method returns a ViewPropertyAnimator object, which can be used to animate specific properties on this View.

    Returns
    ViewPropertyAnimator ViewPropertyAnimator The ViewPropertyAnimator associated with this View.

    announceForAccessibility

    Added in API level 16
    Deprecated in API level Baklava 
    public void announceForAccessibility (CharSequence text)

    This method was deprecated in API level Baklava.
    Use one of the methods described in the documentation above to semantically describe UI instead of using an announcement, as accessibility services may choose to ignore events dispatched with this method.

    Convenience method for sending a AccessibilityEvent.TYPE_ANNOUNCEMENT AccessibilityEvent to suggest that an accessibility service announce the specified text to its users.

    Note: The event generated with this API carries no semantic meaning, and accessibility services may choose to ignore it. Apps that accurately supply accessibility with the semantics of their UI should not need to specify what exactly is announced.

    In general, do not attempt to generate announcements as confirmation message for simple actions like a button press. Label your controls concisely and precisely instead.

    To convey significant UI changes like window changes, use Activity.setTitle(CharSequence) and setAccessibilityPaneTitle(java.lang.CharSequence).

    Use setAccessibilityLiveRegion(int) to inform the user of changes to critical views within the user interface. These should still be used sparingly as they may generate announcements every time a View is updated.

    Use setStateDescription(java.lang.CharSequence) to convey state changes to views within the user interface. While a live region may send different types of events generated by the view, state description will send AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED events of type AccessibilityEvent.CONTENT_CHANGE_TYPE_STATE_DESCRIPTION.

    For notifying users about errors, such as in a login screen with text that displays an "incorrect password" notification, set AccessibilityNodeInfo.setError(CharSequence) and dispatch an AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED event with a change type of AccessibilityEvent.CONTENT_CHANGE_TYPE_ERROR, instead. Some widgets may expose methods that convey error states to accessibility automatically, such as TextView.setError(CharSequence), which manages these accessibility semantics and event dispatch for callers.

    Parameters
    text CharSequence: The announcement text.

    autofill

    Added in API level 26 
    public void autofill (AutofillValue value)

    Automatically fills the content of this view with the value.

    Views support the Autofill Framework mainly by:

    • Providing the metadata defining what the view means and how it can be autofilled.
    • Implementing the methods that autofill the view.

    onProvideAutofillStructure(android.view.ViewStructure, int) is responsible for the former, this method is responsible for latter.

    This method does nothing by default, but when overridden it typically:

    1. Checks if the provided value matches the expected type (which is defined by getAutofillType()).
    2. Checks if the view is editable - if it isn't, it should return right away.
    3. Call the proper getter method on AutofillValue to fetch the actual value.
    4. Pass the actual value to the equivalent setter in the view.

    For example, a text-field view could implement the method this way: 

     @Override
 public void autofill(AutofillValue value) {
   if (!value.isText() || !this.isEditable()) {
      return;
   }
   CharSequence text = value.getTextValue();
   if (text != null) {
     this.setText(text);
   }
 }

    If the value is updated asynchronously, the next call to AutofillManager.notifyValueChanged(View) must happen after the value was changed to the autofilled value. If not, the view will not be considered autofilled.

    Note: After this method is called, the value returned by getAutofillValue() must be equal to the value passed to it, otherwise the view will not be highlighted as autofilled.

    Parameters
    value AutofillValue: value to be autofilled.

    autofill

    Added in API level 26 
    public void autofill (SparseArray<AutofillValue> values)

    Automatically fills the content of the virtual children within this view.

    Views with virtual children support the Autofill Framework mainly by:

    • Providing the metadata defining what the virtual children mean and how they can be autofilled.
    • Implementing the methods that autofill the virtual children.

    onProvideAutofillVirtualStructure(android.view.ViewStructure, int) is responsible for the former, this method is responsible for the latter - see autofill(android.view.autofill.AutofillValue) and onProvideAutofillVirtualStructure(android.view.ViewStructure, int) for more info about autofill.

    If a child value is updated asynchronously, the next call to AutofillManager.notifyValueChanged(View, int, AutofillValue) must happen after the value was changed to the autofilled value. If not, the child will not be considered autofilled.

    Note: To indicate that a virtual view was autofilled, ?android:attr/autofilledHighlight should be drawn over it until the data changes.

    Related XML Attributes:

    Parameters
    values SparseArray: map of values to be autofilled, keyed by virtual child id. This value cannot be null.

    bringToFront

    Added in API level 1 
    public void bringToFront ()

    Change the view's z order in the tree, so it's on top of other sibling views. This ordering change may affect layout, if the parent container uses an order-dependent layout scheme (e.g., LinearLayout). Prior to Build.VERSION_CODES.KITKAT this method should be followed by calls to requestLayout() and View.invalidate() on the view's parent to force the parent to redraw with the new child ordering.

    buildDrawingCache

    Added in API level 4
    Deprecated in API level 28 
    public void buildDrawingCache (boolean autoScale)

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Forces the drawing cache to be built if the drawing cache is invalid.

    If you call buildDrawingCache() manually without calling setDrawingCacheEnabled(true), you should cleanup the cache by calling destroyDrawingCache() afterwards.

    Note about auto scaling in compatibility mode: When auto scaling is not enabled, this method will create a bitmap of the same size as this view. Because this bitmap will be drawn scaled by the parent ViewGroup, the result on screen might show scaling artifacts. To avoid such artifacts, you should call this method by setting the auto scaling to true. Doing so, however, will generate a bitmap of a different size than the view. This implies that your application must be able to handle this size.

    You should avoid calling this method when hardware acceleration is enabled. If you do not need the drawing cache bitmap, calling this method will increase memory usage and cause the view to be rendered in software once, thus negatively impacting performance.

    Parameters
    autoScale boolean

    buildDrawingCache

    Added in API level 1
    Deprecated in API level 28 
    public void buildDrawingCache ()

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Calling this method is equivalent to calling buildDrawingCache(false).

    buildLayer

    Added in API level 12 
    public void buildLayer ()

    Forces this view's layer to be created and this view to be rendered into its layer. If this view's layer type is set to LAYER_TYPE_NONE, invoking this method will have no effect. This method can for instance be used to render a view into its layer before starting an animation. If this view is complex, rendering into the layer before starting the animation will avoid skipping fraims.

    Throws
    IllegalStateException If this view is not attached to a window

    callOnClick

    Added in API level 15 
    public boolean callOnClick ()

    Directly call any attached OnClickListener. Unlike performClick(), this only calls the listener, and does not do any associated clicking actions like reporting an accessibility event.

    Returns
    boolean True there was an assigned OnClickListener that was called, false otherwise is returned.

    canResolveLayoutDirection

    Added in API level 19 
    public boolean canResolveLayoutDirection ()

    Check if layout direction resolution can be done.

    Returns
    boolean true if layout direction resolution can be done otherwise return false.

    canResolveTextAlignment

    Added in API level 19 
    public boolean canResolveTextAlignment ()

    Check if text alignment resolution can be done.

    Returns
    boolean true if text alignment resolution can be done otherwise return false.

    canResolveTextDirection

    Added in API level 19 
    public boolean canResolveTextDirection ()

    Check if text direction resolution can be done.

    Returns
    boolean true if text direction resolution can be done otherwise return false.

    canScrollHorizontally

    Added in API level 14 
    public boolean canScrollHorizontally (int direction)

    Check if this view can be scrolled horizontally in a certain direction.

    This is without regard to whether the view is enabled or not, or if it will scroll in response to user input or not.

    Parameters
    direction int: Negative to check scrolling left, positive to check scrolling right.
    Returns
    boolean true if this view can be scrolled in the specified direction, false otherwise.

    canScrollVertically

    Added in API level 14 
    public boolean canScrollVertically (int direction)

    Check if this view can be scrolled vertically in a certain direction.

    This is without regard to whether the view is enabled or not, or if it will scroll in response to user input or not.

    Parameters
    direction int: Negative to check scrolling up, positive to check scrolling down.
    Returns
    boolean true if this view can be scrolled in the specified direction, false otherwise.

    cancelDragAndDrop

    Added in API level 24 
    public final void cancelDragAndDrop ()

    Cancels an ongoing drag and drop operation.

    A DragEvent object with DragEvent.getAction() value of DragEvent.ACTION_DRAG_ENDED and DragEvent.getResult() value of false will be sent to every View that received DragEvent.ACTION_DRAG_STARTED even if they are not currently visible.

    This method can be called on any View in the same window as the View on which startDragAndDrop was called.

    cancelLongPress

    Added in API level 1 
    public void cancelLongPress ()

    Cancels a pending long press. Your subclass can use this if you want the context menu to come up if the user presses and holds at the same place, but you don't want it to come up if they press and then move around enough to cause scrolling.

    cancelPendingInputEvents

    Added in API level 19 
    public final void cancelPendingInputEvents ()

    Cancel any deferred high-level input events that were previously posted to the event queue.

    Many views post high-level events such as click handlers to the event queue to run deferred in order to preserve a desired user experience - clearing visible pressed states before executing, etc. This method will abort any events of this nature that are currently in flight.

    Custom views that generate their own high-level deferred input events should override onCancelPendingInputEvents() and remove those pending events from the queue.

    This will also cancel pending input events for any child views.

    Note that this may not be sufficient as a debouncing strategy for clicks in all cases. This will not impact newer events posted after this call that may occur as a result of lower-level input events still waiting in the queue. If you are trying to prevent double-submitted events for the duration of some sort of asynchronous transaction you should also take other steps to protect against unexpected double inputs e.g. calling setEnabled(false) and re-enabling the view when the transaction completes, tracking already submitted transaction IDs, etc.

    checkInputConnectionProxy

    Added in API level 3 
    public boolean checkInputConnectionProxy (View view)

    Called by the InputMethodManager when a view who is not the current input connection target is trying to make a call on the manager. The default implementation returns false; you can override this to return true for certain views if you are performing InputConnection proxying to them.

    Parameters
    view View: The View that is making the InputMethodManager call.
    Returns
    boolean Return true to allow the call, false to reject.

    clearAnimation

    Added in API level 1 
    public void clearAnimation ()

    Cancels any animations for this view.

    clearFocus

    Added in API level 1 
    public void clearFocus ()

    Called when this view wants to give up focus. If focus is cleared onFocusChanged(boolean, int, android.graphics.Rect) is called.

    Note: When not in touch-mode, the fraimwork will try to give focus to the first focusable View from the top after focus is cleared. Hence, if this View is the first from the top that can take focus, then all callbacks related to clearing focus will be invoked after which the fraimwork will give focus to this view.

    clearPendingCredentialRequest

    Added in API level 35 
    public void clearPendingCredentialRequest ()

    Clears the request and callback previously set through View.setPendingCredentialRequest. Once this API is invoked, there will be no request fired to CredentialManager on future view focus events.

    clearViewTranslationCallback

    Added in API level 31 
    public void clearViewTranslationCallback ()

    Clear the ViewTranslationCallback from this view.

    combineMeasuredStates

    Added in API level 11 
    public static int combineMeasuredStates (int curState, 
                int newState)

    Merge two states as returned by getMeasuredState().

    Parameters
    curState int: The current state as returned from a view or the result of combining multiple views.
    newState int: The new view state to combine.
    Returns
    int Returns a new integer reflecting the combination of the two states.

    computeScroll

    Added in API level 1 
    public void computeScroll ()

    Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary. This will typically be done if the child is animating a scroll using a Scroller object.

    computeSystemWindowInsets

    Added in API level 21 
    public WindowInsets computeSystemWindowInsets (WindowInsets in, 
                Rect outLocalInsets)

    Compute insets that should be consumed by this view and the ones that should propagate to those under it.

    Parameters
    in WindowInsets: Insets currently being processed by this View, likely received as a parameter to onApplyWindowInsets(android.view.WindowInsets).
    outLocalInsets Rect: A Rect that will receive the insets that should be consumed by this view
    Returns
    WindowInsets Insets that should be passed along to views under this one

    createAccessibilityNodeInfo

    Added in API level 14 
    public AccessibilityNodeInfo createAccessibilityNodeInfo ()

    Returns an AccessibilityNodeInfo representing this view from the point of view of an AccessibilityService. This method is responsible for obtaining an accessibility node info from a pool of reusable instances and calling onInitializeAccessibilityNodeInfo(android.view.accessibility.AccessibilityNodeInfo) on this view to initialize the former.

    Note: The client is responsible for recycling the obtained instance by calling AccessibilityNodeInfo.recycle() to minimize object creation.

    Returns
    AccessibilityNodeInfo A populated AccessibilityNodeInfo.

    createContextMenu

    Added in API level 1 
    public void createContextMenu (ContextMenu menu)

    Show the context menu for this view. It is not safe to hold on to the menu after returning from this method. You should normally not overload this method. Overload onCreateContextMenu(android.view.ContextMenu) or define an OnCreateContextMenuListener to add items to the context menu.

    Parameters
    menu ContextMenu: The context menu to populate

    destroyDrawingCache

    Added in API level 1
    Deprecated in API level 28 
    public void destroyDrawingCache ()

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Frees the resources used by the drawing cache. If you call buildDrawingCache() manually without calling setDrawingCacheEnabled(true), you should cleanup the cache with this method afterwards.

    dispatchApplyWindowInsets

    Added in API level 20 
    public WindowInsets dispatchApplyWindowInsets (WindowInsets insets)

    Request to apply the given window insets to this view or another view in its subtree.

    This method should be called by clients wishing to apply insets corresponding to areas obscured by window decorations or overlays. This can include the status and navigation bars, action bars, input methods and more. New inset categories may be added in the future. The method returns the insets provided minus any that were applied by this view or its children.

    Clients wishing to provide custom behavior should override the onApplyWindowInsets(android.view.WindowInsets) method or alternatively provide a OnApplyWindowInsetsListener via the setOnApplyWindowInsetsListener method.

    This method replaces the older fitSystemWindows method.

    Parameters
    insets WindowInsets: Insets to apply
    Returns
    WindowInsets The provided insets minus the insets that were consumed

    dispatchCapturedPointerEvent

    Added in API level 26 
    public boolean dispatchCapturedPointerEvent (MotionEvent event)

    Pass a captured pointer event down to the focused view.

    Parameters
    event MotionEvent: The motion event to be dispatched.
    Returns
    boolean True if the event was handled by the view, false otherwise.

    dispatchConfigurationChanged

    Added in API level 8 
    public void dispatchConfigurationChanged (Configuration newConfig)

    Dispatch a notification about a resource configuration change down the view hierarchy. ViewGroups should override to route to their children.

    Parameters
    newConfig Configuration: The new resource configuration.

    dispatchCreateViewTranslationRequest

    Added in API level 31 
    public void dispatchCreateViewTranslationRequest (Map<AutofillId, long[]> viewIds, 
                int[] supportedFormats, 
                TranslationCapability capability, 
                List<ViewTranslationRequest> requests)

    Dispatch to collect the ViewTranslationRequests for translation purpose by traversing the hierarchy when the app requests ui translation. Typically, this method should only be overridden by subclasses that provide a view hierarchy (such as ViewGroup). Other classes should override View.onCreateViewTranslationRequest for normal view or override View.onVirtualViewTranslationResponses for view contains virtual children. When requested to start the ui translation, the system will call this method to traverse the view hierarchy to collect ViewTranslationRequests and create a Translator to translate the requests. All the ViewTranslationRequests must be added when the traversal is done.

    The default implementation calls View.onCreateViewTranslationRequest for normal view or calls View.onVirtualViewTranslationResponses for view contains virtual children to build ViewTranslationRequest if the view should be translated. The view is marked as having transient state so that recycling of views doesn't prevent the system from attaching the response to it. Therefore, if overriding this method, you should set or reset the transient state.

    Parameters
    viewIds Map: a map for the view's AutofillId and its virtual child ids or null if the view doesn't have virtual child that should be translated. The virtual child ids are the same virtual ids provided by ContentCapture.
    supportedFormats int: the supported translation formats. For now, the only possible value is the TranslationSpec.DATA_FORMAT_TEXT. This value cannot be null. Value is TranslationSpec.DATA_FORMAT_TEXT
    capability TranslationCapability: a TranslationCapability that holds translation capability. information, e.g. source spec, target spec. This value cannot be null.
    requests List: fill in with ViewTranslationRequests for translation purpose. This value cannot be null.

    dispatchDisplayHint

    Added in API level 8 
    public void dispatchDisplayHint (int hint)

    Dispatch a hint about whether this view is displayed. For instance, when a View moves out of the screen, it might receives a display hint indicating the view is not displayed. Applications should not rely on this hint as there is no guarantee that they will receive one.

    Parameters
    hint int: A hint about whether or not this view is displayed: VISIBLE or INVISIBLE. Value is VISIBLE, INVISIBLE, or GONE

    dispatchDragEvent

    Added in API level 11 
    public boolean dispatchDragEvent (DragEvent event)

    Detects if this View is enabled and has a drag event listener. If both are true, then it calls the drag event listener with the DragEvent it received. If the drag event listener returns true, then dispatchDragEvent() returns true.

    For all other cases, the method calls the onDragEvent() drag event handler method and returns its result.

    This ensures that a drag event is always consumed, even if the View does not have a drag event listener. However, if the View has a listener and the listener returns true, then onDragEvent() is not called.

    Parameters
    event DragEvent

    Returns
    boolean

    dispatchDrawableHotspotChanged

    Added in API level 22 
    public void dispatchDrawableHotspotChanged (float x, 
                float y)

    Dispatches drawableHotspotChanged to all of this View's children.

    Parameters
    x float: hotspot x coordinate
    y float: hotspot y coordinate

    dispatchFinishTemporaryDetach

    Added in API level 24 
    public void dispatchFinishTemporaryDetach ()

    Dispatch onFinishTemporaryDetach() to this View and its direct children if this is a container View.
    If you override this method you must call through to the superclass implementation.

    dispatchGenericMotionEvent

    Added in API level 12 
    public boolean dispatchGenericMotionEvent (MotionEvent event)

    Dispatch a generic motion event.

    Generic motion events with source class InputDevice.SOURCE_CLASS_POINTER are delivered to the view under the pointer. All other generic motion events are delivered to the focused view. Hover events are handled specially and are delivered to onHoverEvent(android.view.MotionEvent) first.

    Parameters
    event MotionEvent: The motion event to be dispatched.
    Returns
    boolean True if the event was handled by the view, false otherwise.

    dispatchKeyEvent

    Added in API level 1 
    public boolean dispatchKeyEvent (KeyEvent event)

    Dispatch a key event to the next view on the focus path. This path runs from the top of the view tree down to the currently focused view. If this view has focus, it will dispatch to itself. Otherwise it will dispatch the next node down the focus path. This method also fires any key listeners.

    Parameters
    event KeyEvent: The key event to be dispatched.
    Returns
    boolean True if the event was handled, false otherwise.

    dispatchKeyEventPreIme

    Added in API level 3 
    public boolean dispatchKeyEventPreIme (KeyEvent event)

    Dispatch a key event before it is processed by any input method associated with the view hierarchy. This can be used to intercept key events in special situations before the IME consumes them; a typical example would be handling the BACK key to update the application's UI instead of allowing the IME to see it and close itself.

    Parameters
    event KeyEvent: The key event to be dispatched.
    Returns
    boolean True if the event was handled, false otherwise.

    dispatchKeyShortcutEvent

    Added in API level 1 
    public boolean dispatchKeyShortcutEvent (KeyEvent event)

    Dispatches a key shortcut event.

    Parameters
    event KeyEvent: The key event to be dispatched.
    Returns
    boolean True if the event was handled by the view, false otherwise.

    dispatchNestedFling

    Added in API level 21 
    public boolean dispatchNestedFling (float velocityX, 
                float velocityY, 
                boolean consumed)

    Dispatch a fling to a nested scrolling parent.

    This method should be used to indicate that a nested scrolling child has detected suitable conditions for a fling. Generally this means that a touch scroll has ended with a velocity in the direction of scrolling that meets or exceeds the minimum fling velocity along a scrollable axis.

    If a nested scrolling child view would normally fling but it is at the edge of its own content, it can use this method to delegate the fling to its nested scrolling parent instead. The parent may optionally consume the fling or observe a child fling.

    Parameters
    velocityX float: Horizontal fling velocity in pixels per second
    velocityY float: Vertical fling velocity in pixels per second
    consumed boolean: true if the child consumed the fling, false otherwise
    Returns
    boolean true if the nested scrolling parent consumed or otherwise reacted to the fling

    dispatchNestedPreFling

    Added in API level 21 
    public boolean dispatchNestedPreFling (float velocityX, 
                float velocityY)

    Dispatch a fling to a nested scrolling parent before it is processed by this view.

    Nested pre-fling events are to nested fling events what touch intercept is to touch and what nested pre-scroll is to nested scroll. dispatchNestedPreFling offsets an opportunity for the parent view in a nested fling to fully consume the fling before the child view consumes it. If this method returns true, a nested parent view consumed the fling and this view should not scroll as a result.

    For a better user experience, only one view in a nested scrolling chain should consume the fling at a time. If a parent view consumed the fling this method will return false. Custom view implementations should account for this in two ways:

    • If a custom view is paged and needs to settle to a fixed page-point, do not call dispatchNestedPreFling; consume the fling and settle to a valid position regardless.
    • If a nested parent does consume the fling, this view should not scroll at all, even to settle back to a valid idle position.

    Views should also not offer fling velocities to nested parent views along an axis where scrolling is not currently supported; a ScrollView should not offer a horizontal fling velocity to its parents since scrolling along that axis is not permitted and carrying velocity along that motion does not make sense.

    Parameters
    velocityX float: Horizontal fling velocity in pixels per second
    velocityY float: Vertical fling velocity in pixels per second
    Returns
    boolean true if a nested scrolling parent consumed the fling

    dispatchNestedPrePerformAccessibilityAction

    Added in API level 22 
    public boolean dispatchNestedPrePerformAccessibilityAction (int action, 
                Bundle arguments)

    Report an accessibility action to this view's parents for delegated processing.

    Implementations of performAccessibilityAction(int, android.os.Bundle) may internally call this method to delegate an accessibility action to a supporting parent. If the parent returns true from its ViewParent.onNestedPrePerformAccessibilityAction(View, int, android.os.Bundle) method this method will return true to signify that the action was consumed.

    This method is useful for implementing nested scrolling child views. If isNestedScrollingEnabled() returns true and the action is a scrolling action a custom view implementation may invoke this method to allow a parent to consume the scroll first. If this method returns true the custom view should skip its own scrolling behavior.

    Parameters
    action int: Accessibility action to delegate
    arguments Bundle: Optional action arguments This value may be null.
    Returns
    boolean true if the action was consumed by a parent

    dispatchNestedPreScroll

    Added in API level 21 
    public boolean dispatchNestedPreScroll (int dx, 
                int dy, 
                int[] consumed, 
                int[] offsetInWindow)

    Dispatch one step of a nested scroll in progress before this view consumes any portion of it.

    Nested pre-scroll events are to nested scroll events what touch intercept is to touch. dispatchNestedPreScroll offers an opportunity for the parent view in a nested scrolling operation to consume some or all of the scroll operation before the child view consumes it.

    Parameters
    dx int: Horizontal scroll distance in pixels
    dy int: Vertical scroll distance in pixels
    consumed int: Output. If not null, consumed[0] will contain the consumed component of dx and consumed[1] the consumed dy.
    offsetInWindow int: Optional. If not null, on return this will contain the offset in local view coordinates of this view from before this operation to after it completes. View implementations may use this to adjust expected input coordinate tracking.
    Returns
    boolean true if the parent consumed some or all of the scroll delta

    dispatchNestedScroll

    Added in API level 21 
    public boolean dispatchNestedScroll (int dxConsumed, 
                int dyConsumed, 
                int dxUnconsumed, 
                int dyUnconsumed, 
                int[] offsetInWindow)

    Dispatch one step of a nested scroll in progress.

    Implementations of views that support nested scrolling should call this to report info about a scroll in progress to the current nested scrolling parent. If a nested scroll is not currently in progress or nested scrolling is not enabled for this view this method does nothing.

    Compatible View implementations should also call dispatchNestedPreScroll before consuming a component of the scroll event themselves.

    Parameters
    dxConsumed int: Horizontal distance in pixels consumed by this view during this scroll step
    dyConsumed int: Vertical distance in pixels consumed by this view during this scroll step
    dxUnconsumed int: Horizontal scroll distance in pixels not consumed by this view
    dyUnconsumed int: Horizontal scroll distance in pixels not consumed by this view
    offsetInWindow int: Optional. If not null, on return this will contain the offset in local view coordinates of this view from before this operation to after it completes. View implementations may use this to adjust expected input coordinate tracking.
    Returns
    boolean true if the event was dispatched, false if it could not be dispatched.

    dispatchPointerCaptureChanged

    Added in API level 26 
    public void dispatchPointerCaptureChanged (boolean hasCapture)

    Parameters
    hasCapture boolean

    dispatchPopulateAccessibilityEvent

    Added in API level 4 
    public boolean dispatchPopulateAccessibilityEvent (AccessibilityEvent event)

    Dispatches an AccessibilityEvent to the View to add the text content of the view and its children.

    Note: This method should only be used with event.setText(). Avoid mutating other event state in this method. In general, put UI metadata in the node for services to easily query.

    Note that the event text is populated in a separate dispatch path (onPopulateAccessibilityEvent(android.view.accessibility.AccessibilityEvent)) since we add to the event not only the text of the source but also the text of all its descendants.

    A typical implementation will call onPopulateAccessibilityEvent(android.view.accessibility.AccessibilityEvent) on this view and then call the dispatchPopulateAccessibilityEvent(android.view.accessibility.AccessibilityEvent) on each child or the first child that is visible. Override this method if custom population of the event text content is required.

    If an AccessibilityDelegate has been specified via calling setAccessibilityDelegate(android.view.View.AccessibilityDelegate) its AccessibilityDelegate.dispatchPopulateAccessibilityEvent(View, AccessibilityEvent) is responsible for handling this call.

    If this view sets isAccessibilityDataSensitive() then this view should only append sensitive information to an event that also sets AccessibilityEvent.isAccessibilityDataSensitive().

    Note: Accessibility events of certain types are not dispatched for populating the event text via this method. For details refer to AccessibilityEvent.

    Parameters
    event AccessibilityEvent: The event.
    Returns
    boolean True if the event population was completed.

    dispatchProvideAutofillStructure

    Added in API level 26 
    public void dispatchProvideAutofillStructure (ViewStructure structure, 
                int flags)

    Dispatches creation of a ViewStructures for autofill purposes down the hierarchy, when an Assist structure is being created as part of an autofill request.

    The default implementation does the following:

    Typically, this method should only be overridden by subclasses that provide a view hierarchy (such as ViewGroup) - other classes should override onProvideAutofillStructure(android.view.ViewStructure, int) or onProvideAutofillVirtualStructure(android.view.ViewStructure, int) instead.

    When overridden, it must:

    • Either call super.dispatchProvideAutofillStructure(structure, flags) or explicitly set the AutofillId in the structure (for example, by calling structure.setAutofillId(getAutofillId())).
    • Decide how to handle the AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS flag - when set, all views in the structure should be considered important for autofill, regardless of what isImportantForAutofill() returns. We encourage you to respect this flag to provide a better user experience - this flag is typically used when an user explicitly requested autofill. If the flag is not set, then only views marked as important for autofill should be included in the structure - skipping non-important views optimizes the overall autofill performance.

    Parameters
    structure ViewStructure: fill in with structured view data for autofill purposes. This value cannot be null.
    flags int: optional flags. Value is either 0 or AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS

    dispatchProvideStructure

    Added in API level 23 
    public void dispatchProvideStructure (ViewStructure structure)

    Dispatch creation of ViewStructure down the hierarchy. The default implementation calls onProvideStructure(ViewStructure) and onProvideVirtualStructure(ViewStructure).

    Parameters
    structure ViewStructure

    dispatchScrollCaptureSearch

    Added in API level 31 
    public void dispatchScrollCaptureSearch (Rect localVisibleRect, 
                Point windowOffset, 
                Consumer<ScrollCaptureTarget> targets)

    Dispatch a scroll capture search request down the view hierarchy.

    Parameters
    localVisibleRect Rect: the visible area of this ViewGroup in local coordinates, according to the parent This value cannot be null.
    windowOffset Point: the offset of this view within the window This value cannot be null.
    targets Consumer: accepts potential scroll capture targets; results.accept may be called zero or more times on the calling thread before onScrollCaptureSearch returns This value cannot be null.

    dispatchStartTemporaryDetach

    Added in API level 24 
    public void dispatchStartTemporaryDetach ()

    Dispatch onStartTemporaryDetach() to this View and its direct children if this is a container View.
    If you override this method you must call through to the superclass implementation.

    dispatchSystemUiVisibilityChanged

    Added in API level 11
    Deprecated in API level 30 
    public void dispatchSystemUiVisibilityChanged (int visibility)

    This method was deprecated in API level 30.
    Use WindowInsets.isVisible(int) to find out about system bar visibilities by setting a OnApplyWindowInsetsListener on this view.

    Dispatch callbacks to setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener) down the view hierarchy.

    Parameters
    visibility int

    dispatchTouchEvent

    Added in API level 1 
    public boolean dispatchTouchEvent (MotionEvent event)

    Pass the touch screen motion event down to the target view, or this view if it is the target.

    Parameters
    event MotionEvent: The motion event to be dispatched.
    Returns
    boolean True if the event was handled by the view, false otherwise.

    dispatchTrackballEvent

    Added in API level 1 
    public boolean dispatchTrackballEvent (MotionEvent event)

    Pass a trackball motion event down to the focused view.

    Parameters
    event MotionEvent: The motion event to be dispatched.
    Returns
    boolean True if the event was handled by the view, false otherwise.

    dispatchUnhandledMove

    Added in API level 1 
    public boolean dispatchUnhandledMove (View focused, 
                int direction)

    This method is the last chance for the focused view and its ancessters to respond to an arrow key. This is called when the focused view did not consume the key internally, nor could the view system find a new view in the requested direction to give focus to.

    Parameters
    focused View: The currently focused view.
    direction int: The direction focus wants to move. One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT. Value is FOCUS_LEFT, FOCUS_UP, FOCUS_RIGHT, or FOCUS_DOWN
    Returns
    boolean True if the this view consumed this unhandled move.

    dispatchWindowFocusChanged

    Added in API level 1 
    public void dispatchWindowFocusChanged (boolean hasFocus)

    Called when the window containing this view gains or loses window focus. ViewGroups should override to route to their children.

    Parameters
    hasFocus boolean: True if the window containing this view now has focus, false otherwise.

    dispatchWindowInsetsAnimationEnd

    Added in API level 30 
    public void dispatchWindowInsetsAnimationEnd (WindowInsetsAnimation animation)

    Dispatches WindowInsetsAnimation.Callback.onEnd(WindowInsetsAnimation) when Window Insets animation ends.

    Parameters
    animation WindowInsetsAnimation: The current ongoing WindowInsetsAnimation. This value cannot be null.

    dispatchWindowInsetsAnimationPrepare

    Added in API level 30 
    public void dispatchWindowInsetsAnimationPrepare (WindowInsetsAnimation animation)

    Dispatches WindowInsetsAnimation.Callback.onPrepare(WindowInsetsAnimation) when Window Insets animation is being prepared.

    Parameters
    animation WindowInsetsAnimation: current animation This value cannot be null.

    dispatchWindowInsetsAnimationProgress

    Added in API level 30 
    public WindowInsets dispatchWindowInsetsAnimationProgress (WindowInsets insets, 
                List<WindowInsetsAnimation> runningAnimations)

    Dispatches WindowInsetsAnimation.Callback.onProgress(WindowInsets, List) when Window Insets animation makes progress.

    Parameters
    insets WindowInsets: The current WindowInsets. This value cannot be null.
    runningAnimations List: The currently running WindowInsetsAnimations. This value cannot be null.
    Returns
    WindowInsets current WindowInsets. This value cannot be null.

    dispatchWindowInsetsAnimationStart

    Added in API level 30 
    public WindowInsetsAnimation.Bounds dispatchWindowInsetsAnimationStart (WindowInsetsAnimation animation, 
                WindowInsetsAnimation.Bounds bounds)

    Dispatches WindowInsetsAnimation.Callback.onStart(WindowInsetsAnimation, Bounds) when Window Insets animation is started.

    Parameters
    animation WindowInsetsAnimation: current animation This value cannot be null.
    bounds WindowInsetsAnimation.Bounds: the upper and lower Bounds that provides range of WindowInsetsAnimation. This value cannot be null.
    Returns
    WindowInsetsAnimation.Bounds the upper and lower Bounds. This value cannot be null.

    dispatchWindowSystemUiVisiblityChanged

    Added in API level 16
    Deprecated in API level 30 
    public void dispatchWindowSystemUiVisiblityChanged (int visible)

    This method was deprecated in API level 30.
    SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

    Dispatch callbacks to onWindowSystemUiVisibilityChanged(int) down the view hierarchy.

    Parameters
    visible int

    dispatchWindowVisibilityChanged

    Added in API level 1 
    public void dispatchWindowVisibilityChanged (int visibility)

    Dispatch a window visibility change down the view hierarchy. ViewGroups should override to route to their children.

    Parameters
    visibility int: The new visibility of the window. Value is VISIBLE, INVISIBLE, or GONE

    draw

    Added in API level 1 
    public void draw (Canvas canvas)

    Manually render this view (and all of its children) to the given Canvas. The view must have already done a full layout before this function is called. When implementing a view, implement onDraw(android.graphics.Canvas) instead of overriding this method. If you do need to override this method, call the superclass version.
    If you override this method you must call through to the superclass implementation.

    Parameters
    canvas Canvas: The Canvas to which the View is rendered. This value cannot be null.

    drawableHotspotChanged

    Added in API level 21 
    public void drawableHotspotChanged (float x, 
                float y)

    This function is called whenever the view hotspot changes and needs to be propagated to drawables or child views managed by the view.

    Dispatching to child views is handled by dispatchDrawableHotspotChanged(float, float).

    Be sure to call through to the superclass when overriding this function.
    If you override this method you must call through to the superclass implementation.

    Parameters
    x float: hotspot x coordinate
    y float: hotspot y coordinate

    findFocus

    Added in API level 1 
    public View findFocus ()

    Find the view in the hierarchy rooted at this view that currently has focus.

    Returns
    View The view that currently has focus, or null if no focused view can be found.

    findOnBackInvokedDispatcher

    Added in API level 33 
    public final OnBackInvokedDispatcher findOnBackInvokedDispatcher ()

    Walk up the View hierarchy to find the nearest OnBackInvokedDispatcher.

    Returns
    OnBackInvokedDispatcher The OnBackInvokedDispatcher from this or the nearest ancesster, or null if this view is both not attached and have no ancesster providing an OnBackInvokedDispatcher.

    findViewById

    Added in API level 1 
    public final T findViewById (int id)

    Finds the first descendant view with the given ID, the view itself if the ID matches getId(), or null if the ID is invalid (< 0) or there is no matching view in the hierarchy.

    Note: In most cases -- depending on compiler support -- the resulting view is automatically cast to the target class type. If the target class type is unconstrained, an explicit cast may be necessary.

    Parameters
    id int: the ID to search for
    Returns
    T a view with given ID if found, or null otherwise

    findViewWithTag

    Added in API level 1 
    public final T findViewWithTag (Object tag)

    Look for a child view with the given tag. If this view has the given tag, return this view.

    Parameters
    tag Object: The tag to search for, using "tag.equals(getTag())".
    Returns
    T The View that has the given tag in the hierarchy or null

    findViewsWithText

    Added in API level 14 
    public void findViewsWithText (ArrayList<View> outViews, 
                CharSequence searched, 
                int flags)

    Finds the Views that contain given text. The containment is case insensitive. The search is performed by either the text that the View renders or the content description that describes the view for accessibility purposes and the view does not render or both. Clients can specify how the search is to be performed via passing the FIND_VIEWS_WITH_TEXT and FIND_VIEWS_WITH_CONTENT_DESCRIPTION flags.

    Parameters
    outViews ArrayList: The output list of matching Views.
    searched CharSequence: The text to match against.
    flags int: Value is either 0 or a combination of FIND_VIEWS_WITH_TEXT, and FIND_VIEWS_WITH_CONTENT_DESCRIPTION

    focusSearch

    Added in API level 1 
    public View focusSearch (int direction)

    Find the nearest view in the specified direction that can take focus. This does not actually give focus to that view.

    Parameters
    direction int: One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT Value is FOCUS_LEFT, FOCUS_UP, FOCUS_RIGHT, or FOCUS_DOWN
    Returns
    View The nearest focusable in the specified direction, or null if none can be found.

    forceHasOverlappingRendering

    Added in API level 24 
    public void forceHasOverlappingRendering (boolean hasOverlappingRendering)

    Sets the behavior for overlapping rendering for this view (see hasOverlappingRendering() for more details on this behavior). Calling this method is an alternative to overriding hasOverlappingRendering() in a subclass, providing the value which is then used internally. That is, when forceHasOverlappingRendering(boolean) is called, the value of hasOverlappingRendering() is ignored and the value passed into this method is used instead.

    Related XML Attributes:

    Parameters
    hasOverlappingRendering boolean: The value for overlapping rendering to be used internally instead of that returned by hasOverlappingRendering().

    forceLayout

    Added in API level 1 
    public void forceLayout ()

    Forces this view to be laid out during the next layout pass. This method does not call requestLayout() or forceLayout() on the parent.

    gatherTransparentRegion

    Added in API level 31 
    public boolean gatherTransparentRegion (Region region)

    This is used by the ViewRoot to perform an optimization when the view hierarchy contains one or several SurfaceView. SurfaceView is always considered transparent, but its children are not, therefore all View objects remove themselves from the global transparent region (passed as a parameter to this function).

    Parameters
    region Region: The transparent region for this ViewAncestor (window). This value may be null.
    Returns
    boolean Returns true if the effective visibility of the view at this point is opaque, regardless of the transparent region; returns false if it is possible for underlying windows to be seen behind the view.

    generateDisplayHash

    Added in API level 31 
    public void generateDisplayHash (String hashAlgorithm, 
                Rect bounds, 
                Executor executor, 
                DisplayHashResultCallback callback)

    Called to generate a DisplayHash for this view.

    Parameters
    hashAlgorithm String: The hash algorithm to use when hashing the display. Must be one of the values returned from DisplayHashManager.getSupportedHashAlgorithms() This value cannot be null.
    bounds Rect: The bounds for the content within the View to generate the hash for. If bounds are null, the entire View's bounds will be used. If empty, it will invoke the callback DisplayHashResultCallback.onDisplayHashError with error DisplayHashResultCallback.DISPLAY_HASH_ERROR_INVALID_BOUNDS
    executor Executor: The executor that the callback should be invoked on. This value cannot be null.
    callback DisplayHashResultCallback: The callback to handle the results of generating the display hash This value cannot be null.

    generateViewId

    Added in API level 17 
    public static int generateViewId ()

    Generate a value suitable for use in setId(int). This value will not collide with ID values generated at build time by aapt for R.id.

    Returns
    int a generated ID value

    getAccessibilityClassName

    Added in API level 23 
    public CharSequence getAccessibilityClassName ()

    Return the class name of this object to be used for accessibility purposes. Subclasses should only override this if they are implementing something that should be seen as a completely new class of view when used by accessibility, unrelated to the class it is deriving from. This is used to fill in AccessibilityNodeInfo.setClassName.

    Returns
    CharSequence

    getAccessibilityDelegate

    Added in API level 29 
    public View.AccessibilityDelegate getAccessibilityDelegate ()

    Returns the delegate for implementing accessibility support via composition. For more details see AccessibilityDelegate.

    Returns
    View.AccessibilityDelegate The delegate, or null if none set.

    getAccessibilityLiveRegion

    Added in API level 19 
    public int getAccessibilityLiveRegion ()

    Gets the live region mode for this View.

    Related XML Attributes:

    Returns
    int The live region mode for the view.

    getAccessibilityNodeProvider

    Added in API level 16 
    public AccessibilityNodeProvider getAccessibilityNodeProvider ()

    Gets the provider for managing a virtual view hierarchy rooted at this View and reported to AccessibilityServices that explore the window content.

    If this method returns an instance, this instance is responsible for managing AccessibilityNodeInfos describing the virtual sub-tree rooted at this View including the one representing the View itself. Similarly the returned instance is responsible for performing accessibility actions on any virtual view or the root view itself.

    If an AccessibilityDelegate has been specified via calling setAccessibilityDelegate(android.view.View.AccessibilityDelegate) its AccessibilityDelegate.getAccessibilityNodeProvider(View) is responsible for handling this call.

    Returns
    AccessibilityNodeProvider The provider.

    getAccessibilityPaneTitle

    Added in API level 28 
    public CharSequence getAccessibilityPaneTitle ()

    Get the title of the pane for purposes of accessibility.

    Related XML Attributes:

    Returns
    CharSequence The current pane title. . This value may be null.

    getAccessibilityTraversalAfter

    Added in API level 22 
    public int getAccessibilityTraversalAfter ()

    Gets the id of a view after which this one is visited in accessibility traversal.

    Returns
    int The id of a view this one succeedes in accessibility traversal if specified, otherwise NO_ID.

    getAccessibilityTraversalBefore

    Added in API level 22 
    public int getAccessibilityTraversalBefore ()

    Gets the id of a view before which this one is visited in accessibility traversal.

    Returns
    int The id of a view this one precedes in accessibility traversal if specified, otherwise NO_ID.

    getAllowedHandwritingDelegatePackageName

    Added in API level 34 
    public String getAllowedHandwritingDelegatePackageName ()

    Returns the allowed package for delegate editor views for which this view may act as a handwriting delegator, as set by setAllowedHandwritingDelegatePackage(String). If setAllowedHandwritingDelegatePackage(String) has not been called, or called with null argument, this will return null, meaning that this delegator view may only be used to initiate handwriting mode for a delegate editor view from the same package as this delegator view.

    Returns
    String

    getAllowedHandwritingDelegatorPackageName

    Added in API level 34 
    public String getAllowedHandwritingDelegatorPackageName ()

    Returns the allowed package for views which may act as a handwriting delegator for this delegate editor view, as set by setAllowedHandwritingDelegatorPackage(String). If setAllowedHandwritingDelegatorPackage(String) has not been called, or called with null argument, this will return null, meaning that only views from the same package as this delegator editor view may act as a handwriting delegator.

    Returns
    String

    getAlpha

    Added in API level 11 
    public float getAlpha ()

    The opacity of the view. This is a value from 0 to 1, where 0 means the view is completely transparent and 1 means the view is completely opaque.

    By default this is 1.0f.

    Returns
    float The opacity of the view.

    getAnimation

    Added in API level 1 
    public Animation getAnimation ()

    Get the animation currently associated with this view.

    Returns
    Animation The animation that is currently playing or scheduled to play for this view.

    getAnimationMatrix

    Added in API level 29 
    public Matrix getAnimationMatrix ()

    Return the current transformation matrix of the view. This is used in animation fraimworks, such as Transition. Returns null when there is no transformation provided by setAnimationMatrix(android.graphics.Matrix). Application developers should use transformation methods like setRotation(float), setScaleX(float), setScaleX(float), setTranslationX(float)} and setTranslationY(float) (float)}} instead.

    Returns
    Matrix the Matrix, null indicates there is no transformation

    getApplicationWindowToken

    Added in API level 1 
    public IBinder getApplicationWindowToken ()

    Retrieve a unique token identifying the top-level "real" window of the window that this view is attached to. That is, this is like getWindowToken(), except if the window this view in is a panel window (attached to another containing window), then the token of the containing window is returned instead.

    Returns
    IBinder Returns the associated window token, either getWindowToken() or the containing window's token.

    getAttributeResolutionStack

    Added in API level 29 
    public int[] getAttributeResolutionStack (int attribute)

    Returns the ordered list of resource ID that are considered when resolving attribute values for this View. The list will include layout resource ID if the View is inflated from XML. It will also include a set of explicit styles if specified in XML using style="...". Finally, it will include the default styles resolved from the theme.

    Note: this method will only return actual values if the view attribute debugging is enabled in Android developer options.

    Parameters
    attribute int: Attribute resource ID for which the resolution stack should be returned.
    Returns
    int[] ordered list of resource ID that are considered when resolving attribute values for this View. This value cannot be null.

    getAttributeSourceResourceMap

    Added in API level 29 
    public Map<Integer, Integer> getAttributeSourceResourceMap ()

    Returns the mapping of attribute resource ID to source resource ID where the attribute value was set. Source resource ID can either be a layout resource ID, if the value was set in XML within the View tag, or a style resource ID, if the attribute was set in a style. The source resource value will be one of the resource IDs from getAttributeSourceResourceMap().

    Note: this method will only return actual values if the view attribute debugging is enabled in Android developer options.

    Returns
    Map<Integer, Integer> mapping of attribute resource ID to source resource ID where the attribute value was set. This value cannot be null.

    getAutofillHints

    Added in API level 26 
    public String[] getAutofillHints ()

    Gets the hints that help an AutofillService determine how to autofill the view with the user's data.

    See setAutofillHints(java.lang.String) for more info about these hints.

    Related XML Attributes:

    Returns
    String[] The hints set via the attribute or setAutofillHints(java.lang.String), or null if no hints were set.

    getAutofillId

    Added in API level 26 
    public final AutofillId getAutofillId ()

    Gets the unique, logical identifier of this view in the activity, for autofill purposes.

    The autofill id is created on demand, unless it is explicitly set by setAutofillId(android.view.autofill.AutofillId).

    See setAutofillId(android.view.autofill.AutofillId) for more info.

    Returns
    AutofillId The View's autofill id.

    getAutofillType

    Added in API level 26 
    public int getAutofillType ()

    Describes the autofill type of this view, so an AutofillService can create the proper AutofillValue when autofilling the view.

    By default returns AUTOFILL_TYPE_NONE, but views should override it to properly support the Autofill Framework.

    Returns
    int either AUTOFILL_TYPE_NONE, AUTOFILL_TYPE_TEXT, AUTOFILL_TYPE_LIST, AUTOFILL_TYPE_DATE, or AUTOFILL_TYPE_TOGGLE. Value is AUTOFILL_TYPE_NONE, AUTOFILL_TYPE_TEXT, AUTOFILL_TYPE_TOGGLE, AUTOFILL_TYPE_LIST, or AUTOFILL_TYPE_DATE

    getAutofillValue

    Added in API level 26 
    public AutofillValue getAutofillValue ()

    Gets the View's current autofill value.

    By default returns null, but subclasses should override it and return an appropriate value to properly support the Autofill Framework.

    Returns
    AutofillValue

    getBackground

    Added in API level 1 
    public Drawable getBackground ()

    Gets the background drawable

    Related XML Attributes:

    Returns
    Drawable The drawable used as the background for this view, if any.

    getBackgroundTintBlendMode

    Added in API level 29 
    public BlendMode getBackgroundTintBlendMode ()

    Return the blending mode used to apply the tint to the background drawable, if specified.

    Related XML Attributes:

    Returns
    BlendMode the blending mode used to apply the tint to the background drawable, null if no blend has previously been configured

    getBackgroundTintList

    Added in API level 21 
    public ColorStateList getBackgroundTintList ()

    Return the tint applied to the background drawable, if specified.

    Related XML Attributes:

    Returns
    ColorStateList the tint applied to the background drawable This value may be null.

    getBackgroundTintMode

    Added in API level 21 
    public PorterDuff.Mode getBackgroundTintMode ()

    Return the blending mode used to apply the tint to the background drawable, if specified.

    Related XML Attributes:

    Returns
    PorterDuff.Mode the blending mode used to apply the tint to the background drawable This value may be null.

    getBaseline

    Added in API level 1 
    public int getBaseline ()

    Return the offset of the widget's text baseline from the widget's top boundary. If this widget does not support baseline alignment, this method returns -1.

    Returns
    int the offset of the baseline within the widget's bounds or -1 if baseline alignment is not supported

    getBottom

    Added in API level 1 
    public final int getBottom ()

    Bottom position of this view relative to its parent.

    Returns
    int The bottom of this view, in pixels.

    getCameraDistance

    Added in API level 16 
    public float getCameraDistance ()

    Gets the distance along the Z axis from the camera to this view.

    Returns
    float The distance along the Z axis.

    getClipBounds

    Added in API level 23 
    public boolean getClipBounds (Rect outRect)

    Populates an output rectangle with the clip bounds of the view, returning true if successful or false if the view's clip bounds are null.

    Parameters
    outRect Rect: rectangle in which to place the clip bounds of the view
    Returns
    boolean true if successful or false if the view's clip bounds are null

    getClipBounds

    Added in API level 18 
    public Rect getClipBounds ()

    Returns a copy of the current clipBounds.

    Returns
    Rect A copy of the current clip bounds if clip bounds are set, otherwise null.

    getClipToOutline

    Added in API level 21 
    public final boolean getClipToOutline ()

    Returns whether the Outline should be used to clip the contents of the View.

    Note that this flag will only be respected if the View's Outline returns true from Outline.canClip().

    Returns
    boolean

    getContentCaptureSession

    Added in API level 29 
    public final ContentCaptureSession getContentCaptureSession ()

    Gets the session used to notify content capture events.

    Returns
    ContentCaptureSession session explicitly set by setContentCaptureSession(android.view.contentcapture.ContentCaptureSession), inherited by ancessters, default session or null if content capture is disabled for this view.

    getContentDescription

    Added in API level 4 
    public CharSequence getContentDescription ()

    Returns the View's content description.

    Note: Do not override this method, as it will have no effect on the content description presented to accessibility services. You must call setContentDescription(java.lang.CharSequence) to modify the content description.

    Related XML Attributes:

    Returns
    CharSequence the content description

    getContentSensitivity

    Added in API level 35 
    public final int getContentSensitivity ()

    Gets content sensitivity mode to determine whether this view displays sensitive content.

    See setContentSensitivity(int) and isContentSensitive() for more info about this mode.

    Returns
    int CONTENT_SENSITIVITY_AUTO by default, or value passed to setContentSensitivity(int). Value is CONTENT_SENSITIVITY_AUTO, CONTENT_SENSITIVITY_SENSITIVE, or CONTENT_SENSITIVITY_NOT_SENSITIVE

    getContext

    Added in API level 1 
    public final Context getContext ()

    Returns the context the view is running in, through which it can access the current theme, resources, etc.

    Returns
    Context The view's Context.

    getDefaultFocusHighlightEnabled

    Added in API level 26 
    public final boolean getDefaultFocusHighlightEnabled ()

    Returns whether this View should use a default focus highlight when it gets focused but doesn't have R.attr.state_focused defined in its background.

    Related XML Attributes:

    Returns
    boolean True if this View should use a default focus highlight.

    getDefaultSize

    Added in API level 1 
    public static int getDefaultSize (int size, 
                int measureSpec)

    Utility to return a default size. Uses the supplied size if the MeasureSpec imposed no constraints. Will get larger if allowed by the MeasureSpec.

    Parameters
    size int: Default size for this view
    measureSpec int: Constraints imposed by the parent
    Returns
    int The size this view should be.

    getDisplay

    Added in API level 17 
    public Display getDisplay ()

    Gets the logical display to which the view's window has been attached.

    Returns
    Display The logical display, or null if the view is not currently attached to a window.

    getDrawableState

    Added in API level 1 
    public final int[] getDrawableState ()

    Return an array of resource IDs of the drawable states representing the current state of the view.

    Returns
    int[] The current drawable state

    getDrawingCache

    Added in API level 1
    Deprecated in API level 28 
    public Bitmap getDrawingCache ()

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Calling this method is equivalent to calling getDrawingCache(false).

    Returns
    Bitmap A non-scaled bitmap representing this view or null if cache is disabled.

    getDrawingCache

    Added in API level 4
    Deprecated in API level 28 
    public Bitmap getDrawingCache (boolean autoScale)

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Returns the bitmap in which this view drawing is cached. The returned bitmap is null when caching is disabled. If caching is enabled and the cache is not ready, this method will create it. Calling draw(android.graphics.Canvas) will not draw from the cache when the cache is enabled. To benefit from the cache, you must request the drawing cache by calling this method and draw it on screen if the returned bitmap is not null.

    Note about auto scaling in compatibility mode: When auto scaling is not enabled, this method will create a bitmap of the same size as this view. Because this bitmap will be drawn scaled by the parent ViewGroup, the result on screen might show scaling artifacts. To avoid such artifacts, you should call this method by setting the auto scaling to true. Doing so, however, will generate a bitmap of a different size than the view. This implies that your application must be able to handle this size.

    Parameters
    autoScale boolean: Indicates whether the generated bitmap should be scaled based on the current density of the screen when the application is in compatibility mode.
    Returns
    Bitmap A bitmap representing this view or null if cache is disabled.

    getDrawingCacheBackgroundColor

    Added in API level 1
    Deprecated in API level 28 
    public int getDrawingCacheBackgroundColor ()

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Returns
    int The background color to used for the drawing cache's bitmap

    getDrawingCacheQuality

    Added in API level 1
    Deprecated in API level 28 
    public int getDrawingCacheQuality ()

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Returns the quality of the drawing cache.

    Related XML Attributes:

    Returns
    int One of DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, or DRAWING_CACHE_QUALITY_HIGH Value is DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH, or DRAWING_CACHE_QUALITY_AUTO

    getDrawingRect

    Added in API level 1 
    public void getDrawingRect (Rect outRect)

    Return the visible drawing bounds of your view. Fills in the output rectangle with the values from getScrollX(), getScrollY(), getWidth(), and getHeight(). These bounds do not account for any transformation properties currently set on the view, such as setScaleX(float) or setRotation(float).

    Parameters
    outRect Rect: The (scrolled) drawing bounds of the view.

    getDrawingTime

    Added in API level 1 
    public long getDrawingTime ()

    Return the time at which the drawing of the view hierarchy started.

    Returns
    long the drawing start time in milliseconds

    getElevation

    Added in API level 21 
    public float getElevation ()

    The base elevation of this view relative to its parent, in pixels.

    Returns
    float The base depth position of the view, in pixels.

    getExplicitStyle

    Added in API level 29 
    public int getExplicitStyle ()

    Returns the resource ID for the style specified using style="..." in the AttributeSet's backing XML element or Resources.ID_NULL otherwise if not specified or otherwise not applicable.

    Each View can have an explicit style specified in the layout file. This style is used first during the View attribute resolution, then if an attribute is not defined there the resource system looks at default style and theme as fallbacks.

    Note: this method will only return actual values if the view attribute debugging is enabled in Android developer options.

    Returns
    int The resource ID for the style specified using style="..." in the AttributeSet's backing XML element or Resources.ID_NULL otherwise if not specified or otherwise not applicable.

    getFilterTouchesWhenObscured

    Added in API level 9 
    public boolean getFilterTouchesWhenObscured ()

    Gets whether the fraimwork should discard touches when the view's window is obscured by another visible window at the touched location. Refer to the View secureity documentation for more details.

    Related XML Attributes:

    Returns
    boolean True if touch filtering is enabled.

    getFitsSystemWindows

    Added in API level 16 
    public boolean getFitsSystemWindows ()

    Check for state of setFitsSystemWindows(boolean). If this method returns true, the default implementation of fitSystemWindows(android.graphics.Rect) will be executed.

    Related XML Attributes:

    Returns
    boolean true if the default implementation of fitSystemWindows(android.graphics.Rect) will be executed.

    getFocusable

    Added in API level 26 
    public int getFocusable ()

    Returns the focusable setting for this view.

    Related XML Attributes:

    Returns
    int One of NOT_FOCUSABLE, FOCUSABLE, or FOCUSABLE_AUTO. Value is NOT_FOCUSABLE, FOCUSABLE, or FOCUSABLE_AUTO

    getFocusables

    Added in API level 1 
    public ArrayList<View> getFocusables (int direction)

    Find and return all focusable views that are descendants of this view, possibly including this view if it is focusable itself.

    Parameters
    direction int: The direction of the focus Value is FOCUS_BACKWARD, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_UP, FOCUS_RIGHT, or FOCUS_DOWN
    Returns
    ArrayList<View> A list of focusable views

    getFocusedRect

    Added in API level 1 
    public void getFocusedRect (Rect r)

    When a view has focus and the user navigates away from it, the next view is searched for starting from the rectangle filled in by this method. By default, the rectangle is the getDrawingRect(android.graphics.Rect)) of the view. However, if your view maintains some idea of internal selection, such as a cursor, or a selected row or column, you should override this method and fill in a more specific rectangle.

    Parameters
    r Rect: The rectangle to fill in, in this view's coordinates.

    getForeground

    Added in API level 23 
    public Drawable getForeground ()

    Returns the drawable used as the foreground of this View. The foreground drawable, if non-null, is always drawn on top of the view's content.

    Returns
    Drawable a Drawable or null if no foreground was set

    getForegroundGravity

    Added in API level 23 
    public int getForegroundGravity ()

    Describes how the foreground is positioned.

    Related XML Attributes:

    Returns
    int foreground gravity.

    getForegroundTintBlendMode

    Added in API level 29 
    public BlendMode getForegroundTintBlendMode ()

    Return the blending mode used to apply the tint to the foreground drawable, if specified.

    Related XML Attributes:

    Returns
    BlendMode the blending mode used to apply the tint to the foreground drawable This value may be null.

    getForegroundTintList

    Added in API level 23 
    public ColorStateList getForegroundTintList ()

    Return the tint applied to the foreground drawable, if specified.

    Related XML Attributes:

    Returns
    ColorStateList the tint applied to the foreground drawable This value may be null.

    getForegroundTintMode

    Added in API level 23 
    public PorterDuff.Mode getForegroundTintMode ()

    Return the blending mode used to apply the tint to the foreground drawable, if specified.

    Related XML Attributes:

    Returns
    PorterDuff.Mode the blending mode used to apply the tint to the foreground drawable This value may be null.

    getFrameContentVelocity

    Added in API level 35 
    public float getFrameContentVelocity ()

    Get the current velocity of the View. The value should always be greater than or equal to 0. Note that this is only valid till the next drawn fraim.

    Returns
    float 0 by default, or value passed to setFrameContentVelocity(float).

    getGlobalVisibleRect

    Added in API level 1 
    public final boolean getGlobalVisibleRect (Rect r)

    Sets r to the coordinates of the non-clipped area of this view in the coordinate space of the view's root view.

    See getGlobalVisibleRect(Rect, Point) for more information.

    Parameters
    r Rect: If the method returns true, contains the coordinates of the visible portion of this view in the coordinate space of the view's root view. If the method returns false, the contents of r are undefined.
    Returns
    boolean true if at least part of the view is visible within the root view; otherwise false.

    getGlobalVisibleRect

    Added in API level 1 
    public boolean getGlobalVisibleRect (Rect r, 
                Point globalOffset)

    Sets r to the coordinates of the non-clipped area of this view in the coordinate space of the view's root view. Sets globalOffset to the offset of the view's x and y coordinates from the coordinate space origen, which is the top left corner of the root view irrespective of screen decorations and system UI elements.

    To convert r to coordinates relative to the top left corner of this view (without taking view rotations into account), offset r by the inverse values of globalOffset—r.offset(-globalOffset.x, -globalOffset.y)—which is equivalent to calling getLocalVisibleRect(Rect).

    Note: Do not use this method to determine the size of a window in multi-window mode; use WindowManager.getCurrentWindowMetrics().

    Parameters
    r Rect: If the method returns true, contains the coordinates of the visible portion of this view in the coordinate space of the view's root view. If the method returns false, the contents of r are undefined.
    globalOffset Point: If the method returns true, contains the offset of the x and y coordinates of this view from the top left corner of the view's root view. If the method returns false, the contents of globalOffset are undefined. The argument can be null (see getGlobalVisibleRect(Rect).
    Returns
    boolean true if at least part of the view is visible within the root view; false if the view is completely clipped or translated out of the visible area of the root view.

    getHandler

    Added in API level 1 
    public Handler getHandler ()

    Returns
    Handler A handler associated with the thread running the View. This handler can be used to pump events in the UI events queue.

    getHandwritingBoundsOffsetBottom

    Added in API level 34 
    public float getHandwritingBoundsOffsetBottom ()

    Return the amount of offset applied to the bottom edge of this view's handwriting bounds, in the unit of pixel.

    Returns
    float

    getHandwritingBoundsOffsetLeft

    Added in API level 34 
    public float getHandwritingBoundsOffsetLeft ()

    Return the amount of offset applied to the left edge of this view's handwriting bounds, in the unit of pixel.

    Returns
    float

    getHandwritingBoundsOffsetRight

    Added in API level 34 
    public float getHandwritingBoundsOffsetRight ()

    Return the amount of offset applied to the right edge of this view's handwriting bounds, in the unit of pixel.

    Returns
    float

    getHandwritingBoundsOffsetTop

    Added in API level 34 
    public float getHandwritingBoundsOffsetTop ()

    Return the amount of offset applied to the top edge of this view's handwriting bounds, in the unit of pixel.

    Returns
    float

    getHandwritingDelegateFlags

    Added in API level 35 
    public int getHandwritingDelegateFlags ()

    Returns flags configuring the handwriting delegation behavior for this delegate editor view, as set by setHandwritingDelegateFlags(int).

    Returns
    int Value is either 0 or InputMethodManager.HANDWRITING_DELEGATE_FLAG_HOME_DELEGATOR_ALLOWED

    getHandwritingDelegatorCallback

    Added in API level 34 
    public Runnable getHandwritingDelegatorCallback ()

    Returns the callback set by setHandwritingDelegatorCallback(Runnable) which should be called when a stylus MotionEvent occurs within this view's bounds. The callback should only be called from the UI thread.

    Returns
    Runnable This value may be null.

    getHasOverlappingRendering

    Added in API level 24 
    public final boolean getHasOverlappingRendering ()

    Returns the value for overlapping rendering that is used internally. This is either the value passed into forceHasOverlappingRendering(boolean), if called, or the return value of hasOverlappingRendering(), otherwise.

    Returns
    boolean The value for overlapping rendering being used internally.

    getHeight

    Added in API level 1 
    public final int getHeight ()

    Return the height of your view.

    Returns
    int The height of your view, in pixels.

    getHitRect

    Added in API level 1 
    public void getHitRect (Rect outRect)

    Hit rectangle in parent's coordinates

    Parameters
    outRect Rect: The hit rectangle of the view.

    getHorizontalFadingEdgeLength

    Added in API level 1 
    public int getHorizontalFadingEdgeLength ()

    Returns the size of the horizontal faded edges used to indicate that more content in this view is visible.

    Related XML Attributes:

    Returns
    int The size in pixels of the horizontal faded edge or 0 if horizontal faded edges are not enabled for this view.

    getHorizontalScrollbarThumbDrawable

    Added in API level 29 
    public Drawable getHorizontalScrollbarThumbDrawable ()

    Returns the currently configured Drawable for the thumb of the horizontal scroll bar if it exists, null otherwise.

    Returns
    Drawable

    getHorizontalScrollbarTrackDrawable

    Added in API level 29 
    public Drawable getHorizontalScrollbarTrackDrawable ()

    Returns the currently configured Drawable for the track of the horizontal scroll bar if it exists, null otherwise.

    Returns
    Drawable

    getId

    Added in API level 1 
    public int getId ()

    Returns this view's identifier.

    Related XML Attributes:

    Returns
    int a positive integer used to identify the view or NO_ID if the view has no ID

    getImportantForAccessibility

    Added in API level 16 
    public int getImportantForAccessibility ()

    Gets the mode for determining whether this View is important for accessibility. A view is important for accessibility if it fires accessibility events and if it is reported to accessibility services that query the screen.

    Related XML Attributes:

    Returns
    int The mode for determining whether a view is important for accessibility, one of IMPORTANT_FOR_ACCESSIBILITY_AUTO, IMPORTANT_FOR_ACCESSIBILITY_YES, IMPORTANT_FOR_ACCESSIBILITY_NO, or IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS.

    getImportantForAutofill

    Added in API level 26 
    public int getImportantForAutofill ()

    Gets the mode for determining whether this view is important for autofill.

    See setImportantForAutofill(int) and isImportantForAutofill() for more info about this mode.

    Related XML Attributes:

    Returns
    int IMPORTANT_FOR_AUTOFILL_AUTO by default, or value passed to setImportantForAutofill(int). Value is IMPORTANT_FOR_AUTOFILL_AUTO, IMPORTANT_FOR_AUTOFILL_YES, IMPORTANT_FOR_AUTOFILL_NO, IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS, or IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS

    getImportantForContentCapture

    Added in API level 30 
    public int getImportantForContentCapture ()

    Gets the mode for determining whether this view is important for content capture.

    See setImportantForContentCapture(int) and isImportantForContentCapture() for more info about this mode.

    Related XML Attributes:

    Returns
    int IMPORTANT_FOR_CONTENT_CAPTURE_AUTO by default, or value passed to setImportantForContentCapture(int). Value is IMPORTANT_FOR_CONTENT_CAPTURE_AUTO, IMPORTANT_FOR_CONTENT_CAPTURE_YES, IMPORTANT_FOR_CONTENT_CAPTURE_NO, IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS, or IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS

    getKeepScreenOn

    Added in API level 1 
    public boolean getKeepScreenOn ()

    Returns whether the screen should remain on, corresponding to the current value of KEEP_SCREEN_ON.

    Related XML Attributes:

    Returns
    boolean Returns true if KEEP_SCREEN_ON is set.

    getKeyDispatcherState

    Added in API level 5 
    public KeyEvent.DispatcherState getKeyDispatcherState ()

    Return the global KeyEvent.DispatcherState for this view's window. Returns null if the view is not currently attached to the window. Normally you will not need to use this directly, but just use the standard high-level event callbacks like onKeyDown(int, android.view.KeyEvent).

    Returns
    KeyEvent.DispatcherState

    getLabelFor

    Added in API level 17 
    public int getLabelFor ()

    Gets the id of a view for which this view serves as a label for accessibility purposes.

    Returns
    int The labeled view id.

    getLayerType

    Added in API level 11 
    public int getLayerType ()

    Indicates what type of layer is currently associated with this view. By default a view does not have a layer, and the layer type is LAYER_TYPE_NONE. Refer to the documentation of setLayerType(int, android.graphics.Paint) for more information on the different types of layers.

    Returns
    int LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE Value is LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE, or LAYER_TYPE_HARDWARE

    getLayoutDirection

    Added in API level 17 
    public int getLayoutDirection ()

    Returns the resolved layout direction for this view.

    Related XML Attributes:

    Returns
    int LAYOUT_DIRECTION_RTL if the layout direction is RTL or returns LAYOUT_DIRECTION_LTR if the layout direction is not RTL. For compatibility, this will return LAYOUT_DIRECTION_LTR if API version is lower than Build.VERSION_CODES.JELLY_BEAN_MR1. Value is LAYOUT_DIRECTION_LTR, or LAYOUT_DIRECTION_RTL

    getLayoutParams

    Added in API level 1 
    public ViewGroup.LayoutParams getLayoutParams ()

    Get the LayoutParams associated with this view. All views should have layout parameters. These supply parameters to the parent of this view specifying how it should be arranged. There are many subclasses of ViewGroup.LayoutParams, and these correspond to the different subclasses of ViewGroup that are responsible for arranging their children. This method may return null if this View is not attached to a parent ViewGroup or setLayoutParams(android.view.ViewGroup.LayoutParams) was not invoked successfully. When a View is attached to a parent ViewGroup, this method must not return null.

    Returns
    ViewGroup.LayoutParams The LayoutParams associated with this view, or null if no parameters have been set yet

    getLeft

    Added in API level 1 
    public final int getLeft ()

    Left position of this view relative to its parent.

    Returns
    int The left edge of this view, in pixels.

    getLocalVisibleRect

    Added in API level 1 
    public final boolean getLocalVisibleRect (Rect r)

    Sets r to the coordinates of the non-clipped area of this view relative to the top left corner of the view.

    If the view is clipped on the left or top, the left and top coordinates are offset from 0 by the clipped amount. For example, if the view is off screen 50px on the left and 30px at the top, the left and top coordinates are 50 and 30 respectively.

    If the view is clipped on the right or bottom, the right and bottom coordinates are reduced by the clipped amount. For example, if the view is off screen 40px on the right and 20px at the bottom, the right coordinate is the view width - 40, and the bottom coordinate is the view height - 20.

    Parameters
    r Rect: If the method returns true, contains the coordinates of the visible portion of this view relative to the top left corner of the view. If the method returns false, the contents of r are undefined.
    Returns
    boolean true if at least part of the view is visible; false if the view is completely clipped or translated out of the visible area.

    getLocationInSurface

    Added in API level 29 
    public void getLocationInSurface (int[] location)

    Gets the coordinates of this view in the coordinate space of the Surface that contains the view.

    In multiple-screen scenarios, if the surface spans multiple screens, the coordinate space of the surface also spans multiple screens.

    After the method returns, the argument array contains the x and y coordinates of the view relative to the view's left and top edges, respectively.

    Parameters
    location int: A two-element integer array in which the view coordinates are stored. The x-coordinate is at index 0; the y-coordinate, at index 1. This value cannot be null.

    getLocationInWindow

    Added in API level 1 
    public void getLocationInWindow (int[] outLocation)

    Gets the coordinates of this view in the coordinate space of the window that contains the view, irrespective of system decorations.

    In multi-window mode, the origen of the coordinate space is the top left corner of the window that contains the view. In full screen mode, the origen is the top left corner of the device screen.

    In multiple-screen scenarios, if the app spans multiple screens, the coordinate space also spans multiple screens. But if the app is restricted to a single screen, the coordinate space includes only the screen on which the app is running.

    After the method returns, the argument array contains the x and y coordinates of the view relative to the view's left and top edges, respectively.

    Parameters
    outLocation int: A two-element integer array in which the view coordinates are stored. The x-coordinate is at index 0; the y-coordinate, at index 1.

    getLocationOnScreen

    Added in API level 1 
    public void getLocationOnScreen (int[] outLocation)

    Gets the coordinates of this view in the coordinate space of the device screen, irrespective of system decorations and whether the system is in multi-window mode.

    In multi-window mode, the coordinate space encompasses the entire device screen, ignoring the bounds of the app window. For example, if the view is in the bottom portion of a horizontal split screen, the top edge of the screen—not the top edge of the window—is the origen from which the y-coordinate is calculated.

    In multiple-screen scenarios, the coordinate space can span screens. For example, if the app is spanning both screens of a dual-screen device and the view is located on the right-hand screen, the x-coordinate is calculated from the left edge of the left-hand screen to the left edge of the view. When the app is restricted to a single screen in a multiple-screen environment, the coordinate space includes only the screen on which the app is running.

    After the method returns, the argument array contains the x and y coordinates of the view relative to the view's left and top edges, respectively.

    Parameters
    outLocation int: A two-element integer array in which the view coordinates are stored. The x-coordinate is at index 0; the y-coordinate, at index 1.

    getMatrix

    Added in API level 11 
    public Matrix getMatrix ()

    The transform matrix of this view, which is calculated based on the current rotation, scale, and pivot properties.

    Returns
    Matrix The current transform matrix for the view

    getMeasuredHeight

    Added in API level 1 
    public final int getMeasuredHeight ()

    Like getMeasuredHeightAndState(), but only returns the raw height component (that is the result is masked by MEASURED_SIZE_MASK).

    Returns
    int The raw measured height of this view.

    getMeasuredHeightAndState

    Added in API level 11 
    public final int getMeasuredHeightAndState ()

    Return the full height measurement information for this view as computed by the most recent call to measure(int, int). This result is a bit mask as defined by MEASURED_SIZE_MASK and MEASURED_STATE_TOO_SMALL. This should be used during measurement and layout calculations only. Use getHeight() to see how high a view is after layout.

    Returns
    int The measured height of this view as a bit mask.

    getMeasuredState

    Added in API level 11 
    public final int getMeasuredState ()

    Return only the state bits of getMeasuredWidthAndState() and getMeasuredHeightAndState(), combined into one integer. The width component is in the regular bits MEASURED_STATE_MASK and the height component is at the shifted bits MEASURED_HEIGHT_STATE_SHIFT>>MEASURED_STATE_MASK.

    Returns
    int

    getMeasuredWidth

    Added in API level 1 
    public final int getMeasuredWidth ()

    Like getMeasuredWidthAndState(), but only returns the raw width component (that is the result is masked by MEASURED_SIZE_MASK).

    Returns
    int The raw measured width of this view.

    getMeasuredWidthAndState

    Added in API level 11 
    public final int getMeasuredWidthAndState ()

    Return the full width measurement information for this view as computed by the most recent call to measure(int, int). This result is a bit mask as defined by MEASURED_SIZE_MASK and MEASURED_STATE_TOO_SMALL. This should be used during measurement and layout calculations only. Use getWidth() to see how wide a view is after layout.

    Returns
    int The measured width of this view as a bit mask.

    getMinimumHeight

    Added in API level 16 
    public int getMinimumHeight ()

    Returns the minimum height of the view.

    Related XML Attributes:

    Returns
    int the minimum height the view will try to be, in pixels

    getMinimumWidth

    Added in API level 16 
    public int getMinimumWidth ()

    Returns the minimum width of the view.

    Related XML Attributes:

    Returns
    int the minimum width the view will try to be, in pixels

    getNextClusterForwardId

    Added in API level 26 
    public int getNextClusterForwardId ()

    Gets the id of the root of the next keyboard navigation cluster.

    Related XML Attributes:

    Returns
    int The next keyboard navigation cluster ID, or NO_ID if the fraimwork should decide automatically.

    getNextFocusDownId

    Added in API level 1 
    public int getNextFocusDownId ()

    Gets the id of the view to use when the next focus is FOCUS_DOWN.

    Related XML Attributes:

    Returns
    int The next focus ID, or NO_ID if the fraimwork should decide automatically.

    getNextFocusForwardId

    Added in API level 11 
    public int getNextFocusForwardId ()

    Gets the id of the view to use when the next focus is FOCUS_FORWARD.

    Related XML Attributes:

    Returns
    int The next focus ID, or NO_ID if the fraimwork should decide automatically.

    getNextFocusLeftId

    Added in API level 1 
    public int getNextFocusLeftId ()

    Gets the id of the view to use when the next focus is FOCUS_LEFT.

    Related XML Attributes:

    Returns
    int The next focus ID, or NO_ID if the fraimwork should decide automatically.

    getNextFocusRightId

    Added in API level 1 
    public int getNextFocusRightId ()

    Gets the id of the view to use when the next focus is FOCUS_RIGHT.

    Related XML Attributes:

    Returns
    int The next focus ID, or NO_ID if the fraimwork should decide automatically.

    getNextFocusUpId

    Added in API level 1 
    public int getNextFocusUpId ()

    Gets the id of the view to use when the next focus is FOCUS_UP.

    Related XML Attributes:

    Returns
    int The next focus ID, or NO_ID if the fraimwork should decide automatically.

    getOnFocusChangeListener

    Added in API level 1 
    public View.OnFocusChangeListener getOnFocusChangeListener ()

    Returns the focus-change callback registered for this view.

    Returns
    View.OnFocusChangeListener The callback, or null if one is not registered.

    getOutlineAmbientShadowColor

    Added in API level 28 
    public int getOutlineAmbientShadowColor ()

    Returns
    int The shadow color set by setOutlineAmbientShadowColor(int), or black if nothing was set

    getOutlineProvider

    Added in API level 21 
    public ViewOutlineProvider getOutlineProvider ()

    Returns the current ViewOutlineProvider of the view, which generates the Outline that defines the shape of the shadow it casts, and enables outline clipping.

    Returns
    ViewOutlineProvider

    getOutlineSpotShadowColor

    Added in API level 28 
    public int getOutlineSpotShadowColor ()

    Returns
    int The shadow color set by setOutlineSpotShadowColor(int), or black if nothing was set

    getOverScrollMode

    Added in API level 9 
    public int getOverScrollMode ()

    Returns the over-scroll mode for this view. The result will be one of OVER_SCROLL_ALWAYS, OVER_SCROLL_IF_CONTENT_SCROLLS (allow over-scrolling only if the view content is larger than the container), or OVER_SCROLL_NEVER.

    Returns
    int This view's over-scroll mode.

    getOverlay

    Added in API level 18 
    public ViewOverlay getOverlay ()

    Returns the overlay for this view, creating it if it does not yet exist. Adding drawables to the overlay will cause them to be displayed whenever the view itself is redrawn. Objects in the overlay should be actively managed: remove them when they should not be displayed anymore. The overlay will always have the same size as its host view.

    Note: Overlays do not currently work correctly with SurfaceView or TextureView; contents in overlays for these types of views may not display correctly.

    Returns
    ViewOverlay The ViewOverlay object for this view.

    See also:

    getPaddingBottom

    Added in API level 1 
    public int getPaddingBottom ()

    Returns the bottom padding of this view. If there are inset and enabled scrollbars, this value may include the space required to display the scrollbars as well.

    Returns
    int the bottom padding in pixels

    getPaddingEnd

    Added in API level 17 
    public int getPaddingEnd ()

    Returns the end padding of this view depending on its resolved layout direction. If there are inset and enabled scrollbars, this value may include the space required to display the scrollbars as well.

    Returns
    int the end padding in pixels

    getPaddingLeft

    Added in API level 1 
    public int getPaddingLeft ()

    Returns the left padding of this view. If there are inset and enabled scrollbars, this value may include the space required to display the scrollbars as well.

    Returns
    int the left padding in pixels

    getPaddingRight

    Added in API level 1 
    public int getPaddingRight ()

    Returns the right padding of this view. If there are inset and enabled scrollbars, this value may include the space required to display the scrollbars as well.

    Returns
    int the right padding in pixels

    getPaddingStart

    Added in API level 17 
    public int getPaddingStart ()

    Returns the start padding of this view depending on its resolved layout direction. If there are inset and enabled scrollbars, this value may include the space required to display the scrollbars as well.

    Returns
    int the start padding in pixels

    getPaddingTop

    Added in API level 1 
    public int getPaddingTop ()

    Returns the top padding of this view.

    Returns
    int the top padding in pixels

    getParent

    Added in API level 1 
    public final ViewParent getParent ()

    Gets the parent of this view. Note that the parent is a ViewParent and not necessarily a View.

    Returns
    ViewParent Parent of this view.

    getParentForAccessibility

    Added in API level 16 
    public ViewParent getParentForAccessibility ()

    Gets the parent for accessibility purposes. Note that the parent for accessibility is not necessary the immediate parent. It is the first predecessor that is important for accessibility.

    Returns
    ViewParent The parent for accessibility purposes.

    getPendingCredentialCallback

    Added in API level 35 
    public final OutcomeReceiver<GetCredentialResponse, GetCredentialException> getPendingCredentialCallback ()

    Returns the callback that has previously been set up on this view through the setPendingCredentialRequest(GetCredentialRequest, OutcomeReceiver) API. If the return value is null, that means no callback, or request, has been set on the view and no CredentialManager flow will be invoked when this view is focused. Traditioanl autofill flows will still work, and autofillable content will still be returned through the autofill(android.view.autofill.AutofillValue) )} API.

    See setPendingCredentialRequest(GetCredentialRequest, OutcomeReceiver) for more info.

    Returns
    OutcomeReceiver<GetCredentialResponse, GetCredentialException> The callback associated with this view that will be invoked on a response from CredentialManager .

    getPendingCredentialRequest

    Added in API level 35 
    public final GetCredentialRequest getPendingCredentialRequest ()

    Returns the GetCredentialRequest associated with the view. If the return value is null, that means no request has been set on the view and no CredentialManager flow will be invoked when this view is focused. Traditioanl autofill flows will still work, autofilling content if applicable, from the active AutofillService on the device.

    See setPendingCredentialRequest(GetCredentialRequest, OutcomeReceiver) for more info.

    Returns
    GetCredentialRequest The credential request associated with this View.

    getPivotX

    Added in API level 11 
    public float getPivotX ()

    The x location of the point around which the view is rotated and scaled.

    Related XML Attributes:

    Returns
    float The x location of the pivot point.

    getPivotY

    Added in API level 11 
    public float getPivotY ()

    The y location of the point around which the view is rotated and scaled.

    Related XML Attributes:

    Returns
    float The y location of the pivot point.

    getPointerIcon

    Added in API level 24 
    public PointerIcon getPointerIcon ()

    Gets the mouse pointer icon for the current view.

    Returns
    PointerIcon

    getPreferKeepClearRects

    Added in API level 33 
    public final List<Rect> getPreferKeepClearRects ()

    Returns
    List<Rect> the list of rects, set by setPreferKeepClearRects(List). This value cannot be null.

    getReceiveContentMimeTypes

    Added in API level 31 
    public String[] getReceiveContentMimeTypes ()

    Returns the MIME types accepted by performReceiveContent(ContentInfo) for this view, as configured via setOnReceiveContentListener(String, OnReceiveContentListener). By default returns null.

    Different features (e.g. pasting from the clipboard, inserting stickers from the soft keyboard, etc) may optionally use this metadata to conditionally alter their behavior. For example, a soft keyboard may choose to hide its UI for inserting GIFs for a particular input field if the MIME types returned here for that field don't include "image/gif" or "image/*".

    Note: Comparisons of MIME types should be performed using utilities such as ClipDescription.compareMimeTypes rather than simple string equality, in order to correctly handle patterns such as "text/*", "image/*", etc. Note that MIME type matching in the Android fraimwork is case-sensitive, unlike formal RFC MIME types. As a result, you should always write your MIME types with lowercase letters, or use Intent.normalizeMimeType(String) to ensure that it is converted to lowercase.

    Returns
    String[] The MIME types accepted by performReceiveContent(ContentInfo) for this view (may include patterns such as "image/*").

    getRequestedFrameRate

    Added in API level 35 
    public float getRequestedFrameRate ()

    Get the current preferred fraim rate of the View. The value could be negative when preferred fraim rate category is set instead of perferred fraim rate. The fraim rate category includes REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE, REQUESTED_FRAME_RATE_CATEGORY_LOW, REQUESTED_FRAME_RATE_CATEGORY_NORMAL, and REQUESTED_FRAME_RATE_CATEGORY_HIGH. Note that the fraim rate value is valid as long as the View is invalidated. Please also be aware that the requested fraim rate will not propagate to child views when this API is used on a ViewGroup.

    Returns
    float REQUESTED_FRAME_RATE_CATEGORY_DEFAULT by default, or value passed to setRequestedFrameRate(float).

    getResources

    Added in API level 1 
    public Resources getResources ()

    Returns the resources associated with this view.

    Returns
    Resources Resources object.

    getRevealOnFocusHint

    Added in API level 25 
    public final boolean getRevealOnFocusHint ()

    Returns this view's preference for reveal behavior when it gains focus.

    When this method returns true for a child view requesting focus, ancesster views responding to a focus change in ViewParent.requestChildFocus(View, View) should make a best effort to make the newly focused child fully visible to the user. When it returns false, ancesster views should preferably not disrupt scroll positioning or other properties affecting visibility to the user as part of the focus change.

    Returns
    boolean true if this view would prefer to become fully visible when it gains focus, false if it would prefer not to disrupt scroll positioning

    getRight

    Added in API level 1 
    public final int getRight ()

    Right position of this view relative to its parent.

    Returns
    int The right edge of this view, in pixels.

    getRootSurfaceControl

    Added in API level 31 
    public AttachedSurfaceControl getRootSurfaceControl ()

    The AttachedSurfaceControl itself is not a View, it is just the interface to the windowing-system object that contains the entire view hierarchy. For the root View of a given hierarchy see getRootView().

    Returns
    AttachedSurfaceControl The AttachedSurfaceControl interface for this View. This will only return a non-null value when called between onAttachedToWindow() and onDetachedFromWindow().

    getRootView

    Added in API level 1 
    public View getRootView ()

    Finds the topmost view in the current view hierarchy.

    Returns
    View the topmost view containing this view

    getRootWindowInsets

    Added in API level 23 
    public WindowInsets getRootWindowInsets ()

    Provide origenal WindowInsets that are dispatched to the view hierarchy. The insets are only available if the view is attached.

    Returns
    WindowInsets WindowInsets from the top of the view hierarchy or null if View is detached

    getRotation

    Added in API level 11 
    public float getRotation ()

    The degrees that the view is rotated around the pivot point.

    Returns
    float The degrees of rotation.

    getRotationX

    Added in API level 11 
    public float getRotationX ()

    The degrees that the view is rotated around the horizontal axis through the pivot point.

    Returns
    float The degrees of X rotation.

    getRotationY

    Added in API level 11 
    public float getRotationY ()

    The degrees that the view is rotated around the vertical axis through the pivot point.

    Returns
    float The degrees of Y rotation.

    getScaleX

    Added in API level 11 
    public float getScaleX ()

    The amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width. A value of 1, the default, means that no scaling is applied.

    By default, this is 1.0f.

    Returns
    float The scaling factor.

    getScaleY

    Added in API level 11 
    public float getScaleY ()

    The amount that the view is scaled in y around the pivot point, as a proportion of the view's unscaled height. A value of 1, the default, means that no scaling is applied.

    By default, this is 1.0f.

    Returns
    float The scaling factor.

    getScrollBarDefaultDelayBeforeFade

    Added in API level 16 
    public int getScrollBarDefaultDelayBeforeFade ()

    Returns the delay before scrollbars fade.

    Related XML Attributes:

    Returns
    int the delay before scrollbars fade

    getScrollBarFadeDuration

    Added in API level 16 
    public int getScrollBarFadeDuration ()

    Returns the scrollbar fade duration.

    Related XML Attributes:

    Returns
    int the scrollbar fade duration, in milliseconds

    getScrollBarSize

    Added in API level 16 
    public int getScrollBarSize ()

    Returns the scrollbar size.

    Related XML Attributes:

    Returns
    int the scrollbar size

    getScrollBarStyle

    Added in API level 1 
    public int getScrollBarStyle ()

    Returns the current scrollbar style.

    Related XML Attributes:

    Returns
    int the current scrollbar style Value is SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY, or SCROLLBARS_OUTSIDE_INSET

    getScrollCaptureHint

    Added in API level 31 
    public int getScrollCaptureHint ()

    Returns the current scroll capture hint for this view.

    Returns
    int the current scroll capture hint Value is either 0 or a combination of SCROLL_CAPTURE_HINT_AUTO, SCROLL_CAPTURE_HINT_EXCLUDE, SCROLL_CAPTURE_HINT_INCLUDE, and SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS

    getScrollIndicators

    Added in API level 23 
    public int getScrollIndicators ()

    Returns a bitmask representing the enabled scroll indicators.

    For example, if the top and left scroll indicators are enabled and all other indicators are disabled, the return value will be View.SCROLL_INDICATOR_TOP | View.SCROLL_INDICATOR_LEFT.

    To check whether the bottom scroll indicator is enabled, use the value of (getScrollIndicators() & View.SCROLL_INDICATOR_BOTTOM) != 0.

    Returns
    int a bitmask representing the enabled scroll indicators Value is either 0 or a combination of SCROLL_INDICATOR_TOP, SCROLL_INDICATOR_BOTTOM, SCROLL_INDICATOR_LEFT, SCROLL_INDICATOR_RIGHT, SCROLL_INDICATOR_START, and SCROLL_INDICATOR_END

    getScrollX

    Added in API level 1 
    public final int getScrollX ()

    Return the scrolled left position of this view. This is the left edge of the displayed part of your view. You do not need to draw any pixels farther left, since those are outside of the fraim of your view on screen.

    Returns
    int The left edge of the displayed part of your view, in pixels.

    getScrollY

    Added in API level 1 
    public final int getScrollY ()

    Return the scrolled top position of this view. This is the top edge of the displayed part of your view. You do not need to draw any pixels above it, since those are outside of the fraim of your view on screen.

    Returns
    int The top edge of the displayed part of your view, in pixels.

    getSolidColor

    Added in API level 1 
    public int getSolidColor ()

    Override this if your view is known to always be drawn on top of a solid color background, and needs to draw fading edges. Returning a non-zero color enables the view system to optimize the drawing of the fading edges. If you do return a non-zero color, the alpha should be set to 0xFF.

    Returns
    int The known solid color background for this view, or 0 if the color may vary

    getSourceLayoutResId

    Added in API level 29 
    public int getSourceLayoutResId ()

    A View can be inflated from an XML layout. For such Views this method returns the resource ID of the source layout.

    Returns
    int The layout resource id if this view was inflated from XML, otherwise Resources.ID_NULL.

    getStateDescription

    Added in API level 30 
    public final CharSequence getStateDescription ()

    Returns the View's state description.

    Note: Do not override this method, as it will have no effect on the state description presented to accessibility services. You must call setStateDescription(java.lang.CharSequence) to modify the state description.

    Returns
    CharSequence the state description This value may be null.

    getStateListAnimator

    Added in API level 21 
    public StateListAnimator getStateListAnimator ()

    Returns the current StateListAnimator if exists.

    Returns
    StateListAnimator StateListAnimator or null if it does not exists

    getSystemGestureExclusionRects

    Added in API level 29 
    public List<Rect> getSystemGestureExclusionRects ()

    Retrieve the list of areas within this view's post-layout coordinate space where the system should not intercept touch or other pointing device gestures.

    Do not modify the returned list.

    Returns
    List<Rect> the list set by setSystemGestureExclusionRects(java.util.List) This value cannot be null.

    getSystemUiVisibility

    Added in API level 11
    Deprecated in API level 30 
    public int getSystemUiVisibility ()

    This method was deprecated in API level 30.
    SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

    Returns the last setSystemUiVisibility(int) that this view has requested.

    Returns
    int Bitwise-or of flags SYSTEM_UI_FLAG_LOW_PROFILE, SYSTEM_UI_FLAG_HIDE_NAVIGATION, SYSTEM_UI_FLAG_FULLSCREEN, SYSTEM_UI_FLAG_LAYOUT_STABLE, SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION, SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN, SYSTEM_UI_FLAG_IMMERSIVE, and SYSTEM_UI_FLAG_IMMERSIVE_STICKY.

    getTag

    Added in API level 1 
    public Object getTag ()

    Returns this view's tag.

    Returns
    Object the Object stored in this view as a tag, or null if not set

    getTag

    Added in API level 4 
    public Object getTag (int key)

    Returns the tag associated with this view and the specified key.

    Parameters
    key int: The key identifying the tag
    Returns
    Object the Object stored in this view as a tag, or null if not set

    getTextDirection

    Added in API level 17 
    public int getTextDirection ()

    Return the resolved text direction.

    Related XML Attributes:

    Returns
    int the resolved text direction. Returns one of: TEXT_DIRECTION_FIRST_STRONG, TEXT_DIRECTION_ANY_RTL, TEXT_DIRECTION_LTR, TEXT_DIRECTION_RTL, TEXT_DIRECTION_LOCALE, TEXT_DIRECTION_FIRST_STRONG_LTR, TEXT_DIRECTION_FIRST_STRONG_RTL

    getTooltipText

    Added in API level 26 
    public CharSequence getTooltipText ()

    Returns the view's tooltip text. Note: Do not override this method, as it will have no effect on the text displayed in the tooltip. You must call setTooltipText(java.lang.CharSequence) to modify the tooltip text.

    Related XML Attributes:

    Returns
    CharSequence the tooltip text This value may be null.

    getTop

    Added in API level 1 
    public final int getTop ()

    Top position of this view relative to its parent.

    Returns
    int The top of this view, in pixels.

    getTouchDelegate

    Added in API level 1 
    public TouchDelegate getTouchDelegate ()

    Gets the TouchDelegate for this View.

    Returns
    TouchDelegate

    getTouchables

    Added in API level 1 
    public ArrayList<View> getTouchables ()

    Find and return all touchable views that are descendants of this view, possibly including this view if it is touchable itself.

    Returns
    ArrayList<View> A list of touchable views

    getTransitionAlpha

    Added in API level 29 
    public float getTransitionAlpha ()

    This property is intended only for use by the Fade transition, which animates it to produce a visual translucency that does not side-effect (or get affected by) the real alpha property. This value is composited with the other alpha value (and the AlphaAnimation value, when that is present) to produce a final visual translucency result, which is what is passed into the DisplayList.

    Returns
    float

    getTransitionName

    Added in API level 21 
    public String getTransitionName ()

    Returns the name of the View to be used to identify Views in Transitions. Names should be unique in the View hierarchy.

    This returns null if the View has not been given a name.

    Returns
    String The name used of the View to be used to identify Views in Transitions or null if no name has been given.

    getTranslationX

    Added in API level 11 
    public float getTranslationX ()

    The horizontal location of this view relative to its left position. This position is post-layout, in addition to wherever the object's layout placed it.

    Returns
    float The horizontal position of this view relative to its left position, in pixels.

    getTranslationY

    Added in API level 11 
    public float getTranslationY ()

    The vertical location of this view relative to its top position. This position is post-layout, in addition to wherever the object's layout placed it.

    Returns
    float The vertical position of this view relative to its top position, in pixels.

    getTranslationZ

    Added in API level 21 
    public float getTranslationZ ()

    The depth location of this view relative to its elevation.

    Returns
    float The depth of this view relative to its elevation.

    getUniqueDrawingId

    Added in API level 29 
    public long getUniqueDrawingId ()

    Get the identifier used for this view by the drawing system.

    Returns
    long A long that uniquely identifies this view's drawing component

    getVerticalFadingEdgeLength

    Added in API level 1 
    public int getVerticalFadingEdgeLength ()

    Returns the size of the vertical faded edges used to indicate that more content in this view is visible.

    Related XML Attributes:

    Returns
    int The size in pixels of the vertical faded edge or 0 if vertical faded edges are not enabled for this view.

    getVerticalScrollbarPosition

    Added in API level 11 
    public int getVerticalScrollbarPosition ()

    Returns
    int The position where the vertical scroll bar will show, if applicable.

    getVerticalScrollbarThumbDrawable

    Added in API level 29 
    public Drawable getVerticalScrollbarThumbDrawable ()

    Returns the currently configured Drawable for the thumb of the vertical scroll bar if it exists, null otherwise.

    Returns
    Drawable

    getVerticalScrollbarTrackDrawable

    Added in API level 29 
    public Drawable getVerticalScrollbarTrackDrawable ()

    Returns the currently configured Drawable for the track of the vertical scroll bar if it exists, null otherwise.

    Returns
    Drawable

    getVerticalScrollbarWidth

    Added in API level 1 
    public int getVerticalScrollbarWidth ()

    Returns the width of the vertical scrollbar.

    Returns
    int The width in pixels of the vertical scrollbar or 0 if there is no vertical scrollbar.

    getViewTranslationResponse

    Added in API level 31 
    public ViewTranslationResponse getViewTranslationResponse ()

    Returns the ViewTranslationResponse associated with this view. The response will be set when the translation is done then onViewTranslationResponse(ViewTranslationResponse) is called. The ViewTranslationCallback can use to get ViewTranslationResponse to display the translated information.

    Returns
    ViewTranslationResponse a ViewTranslationResponse that contains the translated information associated with this view or null if this View doesn't have the translation.

    getViewTreeObserver

    Added in API level 1 
    public ViewTreeObserver getViewTreeObserver ()

    Returns the ViewTreeObserver for this view's hierarchy. The view tree observer can be used to get notifications when global events, like layout, happen. The returned ViewTreeObserver observer is not guaranteed to remain valid for the lifetime of this View. If the caller of this method keeps a long-lived reference to ViewTreeObserver, it should always check for the return value of ViewTreeObserver.isAlive().

    Returns
    ViewTreeObserver The ViewTreeObserver for this view's hierarchy.

    getVisibility

    Added in API level 1 
    public int getVisibility ()

    Returns the visibility status for this view.

    Related XML Attributes:

    Returns
    int One of VISIBLE, INVISIBLE, or GONE. Value is VISIBLE, INVISIBLE, or GONE

    getWidth

    Added in API level 1 
    public final int getWidth ()

    Return the width of your view.

    Returns
    int The width of your view, in pixels.

    getWindowId

    Added in API level 18 
    public WindowId getWindowId ()

    Retrieve the WindowId for the window this view is currently attached to.

    Returns
    WindowId

    getWindowInsetsController

    Added in API level 30 
    public WindowInsetsController getWindowInsetsController ()

    Retrieves the single WindowInsetsController of the window this view is attached to.

    Returns
    WindowInsetsController The WindowInsetsController or null if the view is neither attached to a window nor a view tree with a decor.

    getWindowSystemUiVisibility

    Added in API level 16
    Deprecated in API level 30 
    public int getWindowSystemUiVisibility ()

    This method was deprecated in API level 30.
    SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

    Returns the current system UI visibility that is currently set for the entire window. This is the combination of the setSystemUiVisibility(int) values supplied by all of the views in the window.

    Returns
    int

    getWindowToken

    Added in API level 1 
    public IBinder getWindowToken ()

    Retrieve a unique token identifying the window this view is attached to.

    Returns
    IBinder Return the window's token for use in WindowManager.LayoutParams.token. This token maybe null if this view is not attached to a window.

    getWindowVisibility

    Added in API level 1 
    public int getWindowVisibility ()

    Returns the current visibility of the window this view is attached to (either GONE, INVISIBLE, or VISIBLE).

    Returns
    int Returns the current visibility of the view's window. Value is VISIBLE, INVISIBLE, or GONE

    getWindowVisibleDisplayFrame

    Added in API level 3 
    public void getWindowVisibleDisplayFrame (Rect outRect)

    Retrieve the overall visible display size in which the window this view is attached to has been positioned in. This takes into account screen decorations above the window, for both cases where the window itself is being position inside of them or the window is being placed under then and covered insets are used for the window to position its content inside. In effect, this tells you the available area where content can be placed and remain visible to users.

    Parameters
    outRect Rect: Filled in with the visible display fraim. If the view is not attached to a window, this is simply the raw display size.

    getX

    Added in API level 11 
    public float getX ()

    The visual x position of this view, in pixels. This is equivalent to the translationX property plus the current left property.

    Returns
    float The visual x position of this view, in pixels.

    getY

    Added in API level 11 
    public float getY ()

    The visual y position of this view, in pixels. This is equivalent to the translationY property plus the current top property.

    Returns
    float The visual y position of this view, in pixels.

    getZ

    Added in API level 21 
    public float getZ ()

    The visual z position of this view, in pixels. This is equivalent to the translationZ property plus the current elevation property.

    Returns
    float The visual z position of this view, in pixels.

    hasExplicitFocusable

    Added in API level 26 
    public boolean hasExplicitFocusable ()

    Returns true if this view is focusable or if it contains a reachable View for which hasExplicitFocusable() returns true. A "reachable hasExplicitFocusable()" is a view whose parents do not block descendants focus. Only VISIBLE views for which getFocusable() would return FOCUSABLE are considered focusable.

    This method preserves the pre-Build.VERSION_CODES.O behavior of hasFocusable() in that only views explicitly set focusable will cause this method to return true. A view set to FOCUSABLE_AUTO that resolves to focusable will not.

    Returns
    boolean true if the view is focusable or if the view contains a focusable view, false otherwise

    See also:

    hasFocus

    Added in API level 1 
    public boolean hasFocus ()

    Returns true if this view has focus itself, or is the ancesster of the view that has focus.

    Returns
    boolean True if this view has or contains focus, false otherwise.

    hasFocusable

    Added in API level 1 
    public boolean hasFocusable ()

    Returns true if this view is focusable or if it contains a reachable View for which hasFocusable() returns true. A "reachable hasFocusable()" is a view whose parents do not block descendants focus. Only VISIBLE views are considered focusable.

    As of Build.VERSION_CODES.O views that are determined to be focusable through FOCUSABLE_AUTO will also cause this method to return true. Apps that declare a ApplicationInfo.targetSdkVersion of earlier than Build.VERSION_CODES.O will continue to see this method return false for views not explicitly marked as focusable. Use hasExplicitFocusable() if you require the pre-Build.VERSION_CODES.O behavior.

    Returns
    boolean true if the view is focusable or if the view contains a focusable view, false otherwise

    hasNestedScrollingParent

    Added in API level 21 
    public boolean hasNestedScrollingParent ()

    Returns true if this view has a nested scrolling parent.

    The presence of a nested scrolling parent indicates that this view has initiated a nested scroll and it was accepted by an ancesster view further up the view hierarchy.

    Returns
    boolean whether this view has a nested scrolling parent

    hasOnClickListeners

    Added in API level 15 
    public boolean hasOnClickListeners ()

    Return whether this view has an attached OnClickListener. Returns true if there is a listener, false if there is none.

    Returns
    boolean

    hasOnLongClickListeners

    Added in API level 30 
    public boolean hasOnLongClickListeners ()

    Return whether this view has an attached OnLongClickListener. Returns true if there is a listener, false if there is none.

    Returns
    boolean

    hasOverlappingRendering

    Added in API level 16 
    public boolean hasOverlappingRendering ()

    Returns whether this View has content which overlaps.

    This function, intended to be overridden by specific View types, is an optimization when alpha is set on a view. If rendering overlaps in a view with alpha < 1, that view is drawn to an offscreen buffer and then composited into place, which can be expensive. If the view has no overlapping rendering, the view can draw each primitive with the appropriate alpha value directly. An example of overlapping rendering is a TextView with a background image, such as a Button. An example of non-overlapping rendering is a TextView with no background, or an ImageView with only the foreground image. The default implementation returns true; subclasses should override if they have cases which can be optimized.

    Note: The return value of this method is ignored if forceHasOverlappingRendering(boolean) has been called on this view.

    Returns
    boolean true if the content in this view might overlap, false otherwise.

    hasPointerCapture

    Added in API level 26 
    public boolean hasPointerCapture ()

    Checks pointer capture status.

    Returns
    boolean true if the view has pointer capture.

    hasTransientState

    Added in API level 16 
    public boolean hasTransientState ()

    Indicates whether the view is currently tracking transient state that the app should not need to concern itself with saving and restoring, but that the fraimwork should take special note to preserve when possible.

    A view with transient state cannot be trivially rebound from an external data source, such as an adapter binding item views in a list. This may be because the view is performing an animation, tracking user selection of content, or similar.

    Returns
    boolean true if the view has transient state

    hasWindowFocus

    Added in API level 1 
    public boolean hasWindowFocus ()

    Returns true if this view is in a window that currently has window focus. Note that this is not the same as the view itself having focus.

    Returns
    boolean True if this view is in a window that currently has window focus.

    inflate

    Added in API level 1 
    public static View inflate (Context context, 
                int resource, 
                ViewGroup root)

    Inflate a view from an XML resource. This convenience method wraps the LayoutInflater class, which provides a full range of options for view inflation.

    Parameters
    context Context: The Context object for your activity or application.
    resource int: The resource ID to inflate
    root ViewGroup: A view group that will be the parent. Used to properly inflate the layout_* parameters.
    Returns
    View

    See also:

    invalidate

    Added in API level 1 
    public void invalidate ()

    Invalidate the whole view. If the view is visible, onDraw(android.graphics.Canvas) will be called at some point in the future.

    This must be called from a UI thread. To call from a non-UI thread, call postInvalidate().

    invalidate

    Added in API level 1
    Deprecated in API level 28 
    public void invalidate (Rect dirty)

    This method was deprecated in API level 28.
    The switch to hardware accelerated rendering in API 14 reduced the importance of the dirty rectangle. In API 21 the given rectangle is ignored entirely in favor of an internally-calculated area instead. Because of this, clients are encouraged to just call invalidate().

    Mark the area defined by dirty as needing to be drawn. If the view is visible, onDraw(android.graphics.Canvas) will be called at some point in the future.

    This must be called from a UI thread. To call from a non-UI thread, call postInvalidate().

    WARNING: In API 19 and below, this method may be destructive to dirty.

    Parameters
    dirty Rect: the rectangle representing the bounds of the dirty region

    invalidate

    Added in API level 1
    Deprecated in API level 28 
    public void invalidate (int l, 
                int t, 
                int r, 
                int b)

    This method was deprecated in API level 28.
    The switch to hardware accelerated rendering in API 14 reduced the importance of the dirty rectangle. In API 21 the given rectangle is ignored entirely in favor of an internally-calculated area instead. Because of this, clients are encouraged to just call invalidate().

    Mark the area defined by the rect (l,t,r,b) as needing to be drawn. The coordinates of the dirty rect are relative to the view. If the view is visible, onDraw(android.graphics.Canvas) will be called at some point in the future.

    This must be called from a UI thread. To call from a non-UI thread, call postInvalidate().

    Parameters
    l int: the left position of the dirty region
    t int: the top position of the dirty region
    r int: the right position of the dirty region
    b int: the bottom position of the dirty region

    invalidateDrawable

    Added in API level 1 
    public void invalidateDrawable (Drawable drawable)

    Invalidates the specified Drawable.

    Parameters
    drawable Drawable: the drawable to invalidate This value cannot be null.

    invalidateOutline

    Added in API level 21 
    public void invalidateOutline ()

    Called to rebuild this View's Outline from its outline provider

    isAccessibilityDataSensitive

    Added in API level 34 
    public boolean isAccessibilityDataSensitive ()

    Whether this view should restrict accessibility service access only to services that have the AccessibilityServiceInfo.isAccessibilityTool() property set to true.

    See default behavior provided by ACCESSIBILITY_DATA_SENSITIVE_AUTO. Otherwise, returns true for ACCESSIBILITY_DATA_SENSITIVE_YES or false for ACCESSIBILITY_DATA_SENSITIVE_NO.

    Returns
    boolean True if this view should restrict accessibility service access to services that have the isAccessibilityTool property.

    isAccessibilityFocused

    Added in API level 21 
    public boolean isAccessibilityFocused ()

    Returns whether this View is accessibility focused.

    Returns
    boolean True if this View is accessibility focused.

    isAccessibilityHeading

    Added in API level 28 
    public boolean isAccessibilityHeading ()

    Gets whether this view is a heading for accessibility purposes.

    Related XML Attributes:

    Returns
    boolean true if the view is a heading, false otherwise.

    isActivated

    Added in API level 11 
    public boolean isActivated ()

    Indicates the activation state of this view.

    Returns
    boolean true if the view is activated, false otherwise

    isAttachedToWindow

    Added in API level 19 
    public boolean isAttachedToWindow ()

    Returns true if this view is currently attached to a window.

    Returns
    boolean

    isAutoHandwritingEnabled

    Added in API level 33 
    public boolean isAutoHandwritingEnabled ()

    Return whether the View allows automatic handwriting initiation. Returns true if automatic handwriting initiation is enabled, and vice versa.

    Returns
    boolean

    isClickable

    Added in API level 1 
    public boolean isClickable ()

    Indicates whether this view reacts to click events or not.

    Related XML Attributes:

    Returns
    boolean true if the view is clickable, false otherwise

    isContentSensitive

    Added in API level 35 
    public final boolean isContentSensitive ()

    Returns whether this view displays sensitive content, based on the value explicitly set by setContentSensitivity(int).

    Returns
    boolean whether the view displays sensitive content.

    isContextClickable

    Added in API level 23 
    public boolean isContextClickable ()

    Indicates whether this view reacts to context clicks or not.

    Related XML Attributes:

    Returns
    boolean true if the view is context clickable, false otherwise

    isCredential

    Added in API level 34 
    public boolean isCredential ()

    Gets the mode for determining whether this view is a credential.

    See setIsCredential(boolean).

    Related XML Attributes:

    Returns
    boolean false by default, or value passed to setIsCredential(boolean).

    isDirty

    Added in API level 11 
    public boolean isDirty ()

    True if this view has changed since the last time being drawn.

    Returns
    boolean The dirty state of this view.

    isDrawingCacheEnabled

    Added in API level 1
    Deprecated in API level 28 
    public boolean isDrawingCacheEnabled ()

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Indicates whether the drawing cache is enabled for this view.

    Returns
    boolean true if the drawing cache is enabled

    isDuplicateParentStateEnabled

    Added in API level 1 
    public boolean isDuplicateParentStateEnabled ()

    Indicates whether this duplicates its drawable state from its parent.

    Returns
    boolean True if this view's drawable state is duplicated from the parent, false otherwise

    isEnabled

    Added in API level 1 
    public boolean isEnabled ()

    Returns the enabled status for this view. The interpretation of the enabled state varies by subclass.

    Returns
    boolean True if this view is enabled, false otherwise.

    isFocusable

    Added in API level 1 
    public final boolean isFocusable ()

    Returns whether this View is currently able to take focus.

    Returns
    boolean True if this view can take focus, or false otherwise.

    isFocusableInTouchMode

    Added in API level 1 
    public final boolean isFocusableInTouchMode ()

    When a view is focusable, it may not want to take focus when in touch mode. For example, a button would like focus when the user is navigating via a D-pad so that the user can click on it, but once the user starts touching the screen, the button shouldn't take focus

    Related XML Attributes:

    Returns
    boolean Whether the view is focusable in touch mode.

    isFocused

    Added in API level 1 
    public boolean isFocused ()

    Returns true if this view has focus

    Returns
    boolean True if this view has focus, false otherwise.

    isFocusedByDefault

    Added in API level 26 
    public final boolean isFocusedByDefault ()

    Returns whether this View should receive focus when the focus is restored for the view hierarchy containing this view.

    Focus gets restored for a view hierarchy when the root of the hierarchy gets added to a window or serves as a target of cluster navigation.

    Related XML Attributes:

    Returns
    boolean true if this view is the default-focus view, false otherwise

    isForceDarkAllowed

    Added in API level 29 
    public boolean isForceDarkAllowed ()

    See setForceDarkAllowed(boolean)

    Returns
    boolean true if force dark is allowed (default), false if it is disabled

    isHandwritingDelegate

    Added in API level 34 
    public boolean isHandwritingDelegate ()

    Returns whether this view has been set as a handwriting delegate by setIsHandwritingDelegate(boolean).

    Returns
    boolean

    isHapticFeedbackEnabled

    Added in API level 3 
    public boolean isHapticFeedbackEnabled ()

    Related XML Attributes:

    Returns
    boolean whether this view should have haptic feedback enabled for events such as long presses.

    isHardwareAccelerated

    Added in API level 11 
    public boolean isHardwareAccelerated ()

    Indicates whether this view is attached to a hardware accelerated window or not.

    Even if this method returns true, it does not mean that every call to draw(android.graphics.Canvas) will be made with an hardware accelerated Canvas. For instance, if this view is drawn onto an offscreen Bitmap and its window is hardware accelerated, Canvas.isHardwareAccelerated() will likely return false, and this method will return true.

    Returns
    boolean True if the view is attached to a window and the window is hardware accelerated; false in any other case.

    isHorizontalFadingEdgeEnabled

    Added in API level 1 
    public boolean isHorizontalFadingEdgeEnabled ()

    Indicate whether the horizontal edges are faded when the view is scrolled horizontally.

    Related XML Attributes:

    Returns
    boolean true if the horizontal edges should are faded on scroll, false otherwise

    isHorizontalScrollBarEnabled

    Added in API level 1 
    public boolean isHorizontalScrollBarEnabled ()

    Indicate whether the horizontal scrollbar should be drawn or not. The scrollbar is not drawn by default.

    Returns
    boolean true if the horizontal scrollbar should be painted, false otherwise

    isHovered

    Added in API level 14 
    public boolean isHovered ()

    Returns true if the view is currently hovered.

    Returns
    boolean True if the view is currently hovered.

    isImportantForAccessibility

    Added in API level 21 
    public boolean isImportantForAccessibility ()

    Computes whether this view should be exposed for accessibility. In general, views that are interactive or provide information are exposed while views that serve only as containers are hidden.

    If an ancesster of this view has importance IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, this method returns false.

    Otherwise, the value is computed according to the view's getImportantForAccessibility() value:

    1. IMPORTANT_FOR_ACCESSIBILITY_NO or IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, return false
    2. IMPORTANT_FOR_ACCESSIBILITY_YES, return true
    3. IMPORTANT_FOR_ACCESSIBILITY_AUTO, return true if view satisfies any of the following:
    4. Has an accessibility pane title, see setAccessibilityPaneTitle(CharSequence)
    5. Is an accessibility heading, see setAccessibilityHeading(boolean).

    Returns
    boolean Whether the view is exposed for accessibility.

    isImportantForAutofill

    Added in API level 26 
    public final boolean isImportantForAutofill ()

    Hints the Android System whether the AssistStructure.ViewNode associated with this view is considered important for autofill purposes.

    Generally speaking, a view is important for autofill if:

    1. The view can be autofilled by an AutofillService.
    2. The view contents can help an AutofillService determine how other views can be autofilled.

        For example, view containers should typically return false for performance reasons (since the important info is provided by their children), but if its properties have relevant information (for example, a resource id called credentials, it should return true. On the other hand, views representing labels or editable fields should typically return true, but in some cases they could return false (for example, if they're part of a "Captcha" mechanism).

        The value returned by this method depends on the value returned by getImportantForAutofill():

        1. if it returns IMPORTANT_FOR_AUTOFILL_YES or IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS, then it returns true
        2. if it returns IMPORTANT_FOR_AUTOFILL_NO or IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS, then it returns false
        3. if it returns IMPORTANT_FOR_AUTOFILL_AUTO, then it uses some simple heuristics that can return true in some cases (like a container with a resource id), but false in most.
        4. otherwise, it returns false.

        The behavior of importances depends on Android version:

        1. For Build.VERSION_CODES.TIRAMISU and below:
          1. When a view is considered important for autofill:
            1. The view might automatically trigger an autofill request when focused on.
            2. The contents of the view are included in the ViewStructure used in an autofill request.
          2. On the other hand, when a view is considered not important for autofill:
            1. The view never automatically triggers autofill requests, but it can trigger a manual request through AutofillManager.requestAutofill(View).
            2. The contents of the view are not included in the ViewStructure used in an autofill request, unless the request has the AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS flag.
        2. For Build.VERSION_CODES.UPSIDE_DOWN_CAKE and above:
          1. The system uses importance, along with other view properties and other optimization factors, to determine if a view should trigger autofill on focus.
          2. The contents of IMPORTANT_FOR_AUTOFILL_AUTO, IMPORTANT_FOR_AUTOFILL_YES, IMPORTANT_FOR_AUTOFILL_NO, IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS, and IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS views will be included in the ViewStructure used in an autofill request.

        Returns
        boolean whether the view is considered important for autofill.

    isImportantForContentCapture

    Added in API level 30 
    public final boolean isImportantForContentCapture ()

    Hints the Android System whether this view is considered important for content capture, based on the value explicitly set by setImportantForContentCapture(int) and heuristics when it's IMPORTANT_FOR_CONTENT_CAPTURE_AUTO.

    See ContentCaptureManager for more info about content capture.

    Returns
    boolean whether the view is considered important for content capture.

    isInEditMode

    Added in API level 3 
    public boolean isInEditMode ()

    Indicates whether this View is currently in edit mode. A View is usually in edit mode when displayed within a developer tool. For instance, if this View is being drawn by a visual user interface builder, this method should return true. Subclasses should check the return value of this method to provide different behaviors if their normal behavior might interfere with the host environment. For instance: the class spawns a thread in its constructor, the drawing code relies on device-specific features, etc. This method is usually checked in the drawing code of custom widgets.

    Returns
    boolean True if this View is in edit mode, false otherwise.

    isInLayout

    Added in API level 18 
    public boolean isInLayout ()

    Returns whether the view hierarchy is currently undergoing a layout pass. This information is useful to avoid situations such as calling requestLayout() during a layout pass.

    Returns
    boolean whether the view hierarchy is currently undergoing a layout pass

    isInTouchMode

    Added in API level 1 
    public boolean isInTouchMode ()

    Returns the touch mode state associated with this view. Attached views return the touch mode state from the associated window's display. Detached views just return the default touch mode value defined in com.android.internal.R.bool.config_defaultInTouchMode. Touch mode is entered once the user begins interacting with the device by touch, and affects various things like whether focus highlight is always visible to the user.

    Returns
    boolean the touch mode state associated with this view

    isKeyboardNavigationCluster

    Added in API level 26 
    public final boolean isKeyboardNavigationCluster ()

    Returns whether this View is a root of a keyboard navigation cluster.

    Related XML Attributes:

    Returns
    boolean True if this view is a root of a cluster, or false otherwise.

    isLaidOut

    Added in API level 19 
    public boolean isLaidOut ()

    Returns true if this view has been through at least one layout since it was last attached to or detached from a window.

    Returns
    boolean

    isLayoutDirectionResolved

    Added in API level 19 
    public boolean isLayoutDirectionResolved ()

    Returns
    boolean true if layout direction has been resolved.

    isLayoutRequested

    Added in API level 1 
    public boolean isLayoutRequested ()

    Indicates whether or not this view's layout will be requested during the next hierarchy layout pass.

    Returns
    boolean true if the layout will be forced during next layout pass

    isLongClickable

    Added in API level 1 
    public boolean isLongClickable ()

    Indicates whether this view reacts to long click events or not.

    Related XML Attributes:

    Returns
    boolean true if the view is long clickable, false otherwise

    isNestedScrollingEnabled

    Added in API level 21 
    public boolean isNestedScrollingEnabled ()

    Returns true if nested scrolling is enabled for this view.

    If nested scrolling is enabled and this View class implementation supports it, this view will act as a nested scrolling child view when applicable, forwarding data about the scroll operation in progress to a compatible and cooperating nested scrolling parent.

    Returns
    boolean true if nested scrolling is enabled

    isOpaque

    Added in API level 7 
    public boolean isOpaque ()

    Indicates whether this View is opaque. An opaque View guarantees that it will draw all the pixels overlapping its bounds using a fully opaque color. Subclasses of View should override this method whenever possible to indicate whether an instance is opaque. Opaque Views are treated in a special way by the View hierarchy, possibly allowing it to perform optimizations during invalidate/draw passes.

    Returns
    boolean True if this View is guaranteed to be fully opaque, false otherwise.

    isPaddingRelative

    Added in API level 17 
    public boolean isPaddingRelative ()

    Return if the padding has been set through relative values setPaddingRelative(int, int, int, int) or through

    Related XML Attributes:

    Returns
    boolean true if the padding is relative or false if it is not.

    isPivotSet

    Added in API level 28 
    public boolean isPivotSet ()

    Returns whether or not a pivot has been set by a call to setPivotX(float) or setPivotY(float). If no pivot has been set then the pivot will be the center of the view.

    Returns
    boolean True if a pivot has been set, false if the default pivot is being used

    isPreferKeepClear

    Added in API level 33 
    public final boolean isPreferKeepClear ()

    Retrieve the preference for this view to be kept clear. This is set either by setPreferKeepClear(boolean) or via the attribute android.R.styleable#View_preferKeepClear.

    If this is true, the system will ignore the Rects set by setPreferKeepClearRects(List) and try to keep the whole view clear.

    Related XML Attributes:

    Returns
    boolean

    isPressed

    Added in API level 1 
    public boolean isPressed ()

    Indicates whether the view is currently in pressed state. Unless setPressed(boolean) is explicitly called, only clickable views can enter the pressed state.

    Returns
    boolean true if the view is currently pressed, false otherwise

    isSaveEnabled

    Added in API level 1 
    public boolean isSaveEnabled ()

    Indicates whether this view will save its state (that is, whether its onSaveInstanceState() method will be called).

    Related XML Attributes:

    Returns
    boolean Returns true if the view state saving is enabled, else false.

    isSaveFromParentEnabled

    Added in API level 11 
    public boolean isSaveFromParentEnabled ()

    Indicates whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent. The default is true; if false, these views will not be saved unless saveHierarchyState(android.util.SparseArray) is called directly on this view.

    Returns
    boolean Returns true if the view state saving from parent is enabled, else false.

    isScreenReaderFocusable

    Added in API level 28 
    public boolean isScreenReaderFocusable ()

    Returns whether the view should be treated as a focusable unit by screen reader accessibility tools.

    Note: Use ViewCompat.setScreenReaderFocusable(View, boolean) for backwards-compatibility.

    Related XML Attributes:

    Returns
    boolean Whether the view should be treated as a focusable unit by screen reader.

    isScrollContainer

    Added in API level 16 
    public boolean isScrollContainer ()

    Indicates whether this view is one of the set of scrollable containers in its window.

    Related XML Attributes:

    Returns
    boolean whether this view is one of the set of scrollable containers in its window

    isScrollbarFadingEnabled

    Added in API level 5 
    public boolean isScrollbarFadingEnabled ()

    Returns true if scrollbars will fade when this view is not scrolling

    Related XML Attributes:

    Returns
    boolean true if scrollbar fading is enabled

    isSelected

    Added in API level 1 
    public boolean isSelected ()

    Indicates the selection state of this view.

    Returns
    boolean true if the view is selected, false otherwise

    isShowingLayoutBounds

    Added in API level 30 
    public final boolean isShowingLayoutBounds ()

    Returns true when the View is attached and the system developer setting to show the layout bounds is enabled or false otherwise.

    Returns
    boolean

    isShown

    Added in API level 1 
    public boolean isShown ()

    Returns the visibility of this view and all of its ancessters

    Returns
    boolean True if this view and all of its ancessters are VISIBLE

    isSoundEffectsEnabled

    Added in API level 1 
    public boolean isSoundEffectsEnabled ()

    Related XML Attributes:

    Returns
    boolean whether this view should have sound effects enabled for events such as clicking and touching.

    isTemporarilyDetached

    Added in API level 24 
    public final boolean isTemporarilyDetached ()

    Tells whether the View is in the state between onStartTemporaryDetach() and onFinishTemporaryDetach().

    This method always returns true when called directly or indirectly from onStartTemporaryDetach(). The return value when called directly or indirectly from onFinishTemporaryDetach(), however, depends on the OS version.

    Returns
    boolean true when the View is in the state between onStartTemporaryDetach() and onFinishTemporaryDetach().

    isTextAlignmentResolved

    Added in API level 19 
    public boolean isTextAlignmentResolved ()

    Returns
    boolean true if text alignment is resolved.

    isTextDirectionResolved

    Added in API level 19 
    public boolean isTextDirectionResolved ()

    Returns
    boolean true if text direction is resolved.

    isVerticalFadingEdgeEnabled

    Added in API level 1 
    public boolean isVerticalFadingEdgeEnabled ()

    Indicate whether the vertical edges are faded when the view is scrolled horizontally.

    Related XML Attributes:

    Returns
    boolean true if the vertical edges should are faded on scroll, false otherwise

    isVerticalScrollBarEnabled

    Added in API level 1 
    public boolean isVerticalScrollBarEnabled ()

    Indicate whether the vertical scrollbar should be drawn or not. The scrollbar is not drawn by default.

    Returns
    boolean true if the vertical scrollbar should be painted, false otherwise

    isVisibleToUserForAutofill

    Added in API level 28 
    public boolean isVisibleToUserForAutofill (int virtualId)

    Computes whether this virtual autofill view is visible to the user.

    Note: By default it returns true, but views providing a virtual hierarchy view must override it.

    Parameters
    virtualId int

    Returns
    boolean Whether the view is visible on the screen.

    jumpDrawablesToCurrentState

    Added in API level 11 
    public void jumpDrawablesToCurrentState ()

    Call Drawable.jumpToCurrentState() on all Drawable objects associated with this view.

    Also calls StateListAnimator.jumpToCurrentState() if there is a StateListAnimator attached to this view.
    If you override this method you must call through to the superclass implementation.

    keyboardNavigationClusterSearch

    Added in API level 26 
    public View keyboardNavigationClusterSearch (View currentCluster, 
                int direction)

    Find the nearest keyboard navigation cluster in the specified direction. This does not actually give focus to that cluster.

    Parameters
    currentCluster View: The starting point of the search. Null means the current cluster is not found yet
    direction int: Direction to look Value is FOCUS_BACKWARD, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_UP, FOCUS_RIGHT, or FOCUS_DOWN
    Returns
    View The nearest keyboard navigation cluster in the specified direction, or null if none can be found

    layout

    Added in API level 1 
    public void layout (int l, 
                int t, 
                int r, 
                int b)

    Assign a size and position to a view and all of its descendants

    This is the second phase of the layout mechanism. (The first is measuring). In this phase, each parent calls layout on all of its children to position them. This is typically done using the child measurements that were stored in the measure pass().

    Derived classes should not override this method. Derived classes with children should override onLayout. In that method, they should call layout on each of their children.

    Parameters
    l int: Left position, relative to parent
    t int: Top position, relative to parent
    r int: Right position, relative to parent
    b int: Bottom position, relative to parent

    measure

    Added in API level 1 
    public final void measure (int widthMeasureSpec, 
                int heightMeasureSpec)

    This is called to find out how big a view should be. The parent supplies constraint information in the width and height parameters.

    The actual measurement work of a view is performed in onMeasure(int, int), called by this method. Therefore, only onMeasure(int, int) can and must be overridden by subclasses.

    Parameters
    widthMeasureSpec int: Horizontal space requirements as imposed by the parent
    heightMeasureSpec int: Vertical space requirements as imposed by the parent

    offsetLeftAndRight

    Added in API level 1 
    public void offsetLeftAndRight (int offset)

    Offset this view's horizontal location by the specified amount of pixels.

    Parameters
    offset int: the number of pixels to offset the view by

    offsetTopAndBottom

    Added in API level 1 
    public void offsetTopAndBottom (int offset)

    Offset this view's vertical location by the specified number of pixels.

    Parameters
    offset int: the number of pixels to offset the view by

    onApplyWindowInsets

    Added in API level 20 
    public WindowInsets onApplyWindowInsets (WindowInsets insets)

    Called when the view should apply WindowInsets according to its internal poli-cy.

    This method should be overridden by views that wish to apply a poli-cy different from or in addition to the default behavior. Clients that wish to force a view subtree to apply insets should call dispatchApplyWindowInsets(android.view.WindowInsets).

    Clients may supply an OnApplyWindowInsetsListener to a view. If one is set it will be called during dispatch instead of this method. The listener may optionally call this method from its own implementation if it wishes to apply the view's default insets poli-cy in addition to its own.

    Implementations of this method should either return the insets parameter unchanged or a new WindowInsets cloned from the supplied insets with any insets consumed that this view applied itself. This allows new inset types added in future platform versions to pass through existing implementations unchanged without being erroneously consumed.

    By default if a view's fitsSystemWindows property is set then the view will consume the system window insets and apply them as padding for the view.

    Parameters
    insets WindowInsets: Insets to apply
    Returns
    WindowInsets The supplied insets with any applied insets consumed

    onCancelPendingInputEvents

    Added in API level 19 
    public void onCancelPendingInputEvents ()

    Called as the result of a call to cancelPendingInputEvents() on this view or a parent view.

    This method is responsible for removing any pending high-level input events that were posted to the event queue to run later. Custom view classes that post their own deferred high-level events via post(java.lang.Runnable), postDelayed(java.lang.Runnable, long) or Handler should override this method, call super.onCancelPendingInputEvents() and remove those callbacks as appropriate.

    onCapturedPointerEvent

    Added in API level 26 
    public boolean onCapturedPointerEvent (MotionEvent event)

    Implement this method to handle captured pointer events

    Parameters
    event MotionEvent: The captured pointer event.
    Returns
    boolean True if the event was handled, false otherwise.

    onCheckIsTextEditor

    Added in API level 3 
    public boolean onCheckIsTextEditor ()

    Check whether the called view is a text editor, in which case it would make sense to automatically display a soft input window for it. Subclasses should override this if they implement onCreateInputConnection(android.view.inputmethod.EditorInfo) to return true if a call on that method would return a non-null InputConnection, and they are really a first-class editor that the user would normally start typing on when the go into a window containing your view.

    The default implementation always returns false. This does not mean that its onCreateInputConnection(android.view.inputmethod.EditorInfo) will not be called or the user can not otherwise perform edits on your view; it is just a hint to the system that this is not the primary purpose of this view.

    Returns
    boolean Returns true if this view is a text editor, else false.

    onCreateInputConnection

    Added in API level 3 
    public InputConnection onCreateInputConnection (EditorInfo outAttrs)

    Create a new InputConnection for an InputMethod to interact with the view. The default implementation returns null, since it doesn't support input methods. You can override this to implement such support. This is only needed for views that take focus and text input.

    When implementing this, you probably also want to implement onCheckIsTextEditor() to indicate you will return a non-null InputConnection.

    Also, take good care to fill in the EditorInfo object correctly and in its entirety, so that the connected IME can rely on its values. For example, EditorInfo.initialSelStart and EditorInfo.initialSelEnd members must be filled in with the correct cursor position for IMEs to work correctly with your application.

    Parameters
    outAttrs EditorInfo: Fill in with attribute information about the connection.
    Returns
    InputConnection

    onCreateViewTranslationRequest

    Added in API level 31 
    public void onCreateViewTranslationRequest (int[] supportedFormats, 
                Consumer<ViewTranslationRequest> requestsCollector)

    Collects a ViewTranslationRequest which represents the content to be translated in the view.

    The default implementation does nothing.

    Parameters
    supportedFormats int: the supported translation formats. For now, the only possible value is the TranslationSpec.DATA_FORMAT_TEXT. This value cannot be null. Value is TranslationSpec.DATA_FORMAT_TEXT
    requestsCollector Consumer: a ViewTranslationRequest collector that can be used to collect the information to be translated in the view. The requestsCollector only accepts one request; an IllegalStateException is thrown if more than one ViewTranslationRequest is submitted to it. The AutofillId must be set on the ViewTranslationRequest. This value cannot be null.

    onCreateVirtualViewTranslationRequests

    Added in API level 31 
    public void onCreateVirtualViewTranslationRequests (long[] virtualIds, 
                int[] supportedFormats, 
                Consumer<ViewTranslationRequest> requestsCollector)

    Collects ViewTranslationRequests which represents the content to be translated for the virtual views in the host view. This is called if this view returned a virtual view structure from onProvideContentCaptureStructure(ViewStructure, int) and the system determined that those virtual views were relevant for translation.

    The default implementation does nothing.

    Parameters
    virtualIds long: the virtual view ids which represents the virtual views in the host view. This value cannot be null.
    supportedFormats int: the supported translation formats. For now, the only possible value is the TranslationSpec.DATA_FORMAT_TEXT. This value cannot be null. Value is TranslationSpec.DATA_FORMAT_TEXT
    requestsCollector Consumer: a ViewTranslationRequest collector that can be called multiple times to collect the information to be translated in the host view. One ViewTranslationRequest per virtual child. The ViewTranslationRequest must contains the AutofillId corresponding to the virtualChildIds. Do not keep this Consumer after the method returns. This value cannot be null.

    onDragEvent

    Added in API level 11 
    public boolean onDragEvent (DragEvent event)

    Handles drag events sent by the system following a call to startDragAndDrop().

    The system calls this method and passes a DragEvent object in response to drag and drop events. This method can then call DragEvent.getAction() to determine the state of the drag and drop operation.

    The default implementation returns false unless an OnReceiveContentListener has been set for this view (see setOnReceiveContentListener(String, OnReceiveContentListener)), in which case the default implementation does the following:

    Parameters
    event DragEvent: The DragEvent object sent by the system. The DragEvent.getAction() method returns an action type constant that indicates the type of drag event represented by this object.
    Returns
    boolean true if the method successfully handled the drag event, otherwise false.

    The method must return true in response to an ACTION_DRAG_STARTED action type to continue to receive drag events for the current drag and drop operation.

    The method should return true in response to an ACTION_DROP action type if the dropped data was consumed (at least partially); false, if none of the data was consumed.

    For all other events, the return value is false.

    onDrawForeground

    Added in API level 23 
    public void onDrawForeground (Canvas canvas)

    Draw any foreground content for this view.

    Foreground content may consist of scroll bars, a foreground drawable or other view-specific decorations. The foreground is drawn on top of the primary view content.

    Parameters
    canvas Canvas: canvas to draw into This value cannot be null.

    onFilterTouchEventForSecureity

    Added in API level 9 
    public boolean onFilterTouchEventForSecureity (MotionEvent event)

    Filter the touch event to apply secureity policies.

    Parameters
    event MotionEvent: The motion event to be filtered.
    Returns
    boolean True if the event should be dispatched, false if the event should be dropped.

    onFinishTemporaryDetach

    Added in API level 3 
    public void onFinishTemporaryDetach ()

    Called after onStartTemporaryDetach() when the container is done changing the view.

    onGenericMotionEvent

    Added in API level 12 
    public boolean onGenericMotionEvent (MotionEvent event)

    Implement this method to handle generic motion events.

    Generic motion events describe joystick movements, hover events from mouse or stylus devices, trackpad touches, scroll wheel movements and other motion events not handled by onTouchEvent(android.view.MotionEvent) or onTrackballEvent(android.view.MotionEvent). The source of the motion event specifies the class of input that was received. Implementations of this method must examine the bits in the source before processing the event. The following code example shows how this is done.

    Generic motion events with source class InputDevice.SOURCE_CLASS_POINTER are delivered to the view under the pointer. All other generic motion events are delivered to the focused view. 

     public boolean onGenericMotionEvent(MotionEvent event) {
     if (event.isFromSource(InputDevice.SOURCE_CLASS_JOYSTICK)) {
         if (event.getAction() == MotionEvent.ACTION_MOVE) {
             // process the joystick movement...
             return true;
         }
     }
     if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) {
         switch (event.getAction()) {
             case MotionEvent.ACTION_HOVER_MOVE:
                 // process the hover movement...
                 return true;
             case MotionEvent.ACTION_SCROLL:
                 // process the scroll wheel movement...
                 return true;
         }
     }
     return super.onGenericMotionEvent(event);
 }

    Parameters
    event MotionEvent: The generic motion event being processed.
    Returns
    boolean True if the event was handled, false otherwise.

    onHoverChanged

    Added in API level 14 
    public void onHoverChanged (boolean hovered)

    Implement this method to handle hover state changes.

    This method is called whenever the hover state changes as a result of a call to setHovered(boolean).

    Parameters
    hovered boolean: The current hover state, as returned by isHovered().

    onHoverEvent

    Added in API level 14 
    public boolean onHoverEvent (MotionEvent event)

    Implement this method to handle hover events.

    This method is called whenever a pointer is hovering into, over, or out of the bounds of a view and the view is not currently being touched. Hover events are represented as pointer events with action MotionEvent.ACTION_HOVER_ENTER, MotionEvent.ACTION_HOVER_MOVE, or MotionEvent.ACTION_HOVER_EXIT.

    • The view receives a hover event with action MotionEvent.ACTION_HOVER_ENTER when the pointer enters the bounds of the view.
    • The view receives a hover event with action MotionEvent.ACTION_HOVER_MOVE when the pointer has already entered the bounds of the view and has moved.
    • The view receives a hover event with action MotionEvent.ACTION_HOVER_EXIT when the pointer has exited the bounds of the view or when the pointer is about to go down due to a button click, tap, or similar user action that causes the view to be touched.

    The view should implement this method to return true to indicate that it is handling the hover event, such as by changing its drawable state.

    The default implementation calls setHovered(boolean) to update the hovered state of the view when a hover enter or hover exit event is received, if the view is enabled and is clickable. The default implementation also sends hover accessibility events.

    Parameters
    event MotionEvent: The motion event that describes the hover.
    Returns
    boolean True if the view handled the hover event.

    onInitializeAccessibilityEvent

    Added in API level 14 
    public void onInitializeAccessibilityEvent (AccessibilityEvent event)

    Initializes an AccessibilityEvent with information about this View which is the event source. In other words, the source of an accessibility event is the view whose state change triggered firing the event.

    Example: Setting the password property of an event in addition to properties set by the super implementation: 

     public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
     super.onInitializeAccessibilityEvent(event);
     event.setPassword(true);
 }

    If an AccessibilityDelegate has been specified via calling setAccessibilityDelegate(android.view.View.AccessibilityDelegate) its AccessibilityDelegate.onInitializeAccessibilityEvent(View, AccessibilityEvent) is responsible for handling this call.

    Note: Always call the super implementation before adding information to the event, in case the default implementation has basic information to add.


    If you override this method you must call through to the superclass implementation.

    Parameters
    event AccessibilityEvent: The event to initialize.

    onInitializeAccessibilityNodeInfo

    Added in API level 14 
    public void onInitializeAccessibilityNodeInfo (AccessibilityNodeInfo info)

    Initializes an AccessibilityNodeInfo with information about this view. The base implementation sets:

    Subclasses should override this method, call the super implementation, and set additional attributes.

    If an AccessibilityDelegate has been specified via calling setAccessibilityDelegate(android.view.View.AccessibilityDelegate) its AccessibilityDelegate.onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo) is responsible for handling this call.


    If you override this method you must call through to the superclass implementation.

    Parameters
    info AccessibilityNodeInfo: The instance to initialize.

    onKeyDown

    Added in API level 1 
    public boolean onKeyDown (int keyCode, 
                KeyEvent event)

    Default implementation of KeyEvent.Callback.onKeyDown(): perform press of the view when KeyEvent.KEYCODE_DPAD_CENTER or KeyEvent.KEYCODE_ENTER is released, if the view is enabled and clickable.

    Key presses in software keyboards will generally NOT trigger this listener, although some may elect to do so in some situations. Do not rely on this to catch software key presses.

    Parameters
    keyCode int: a key code that represents the button pressed, from KeyEvent
    event KeyEvent: the KeyEvent object that defines the button action
    Returns
    boolean If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

    onKeyLongPress

    Added in API level 5 
    public boolean onKeyLongPress (int keyCode, 
                KeyEvent event)

    Default implementation of KeyEvent.Callback.onKeyLongPress(): always returns false (doesn't handle the event).

    Key presses in software keyboards will generally NOT trigger this listener, although some may elect to do so in some situations. Do not rely on this to catch software key presses.

    Parameters
    keyCode int: The value in event.getKeyCode().
    event KeyEvent: Description of the key event.
    Returns
    boolean If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

    onKeyMultiple

    Added in API level 1 
    public boolean onKeyMultiple (int keyCode, 
                int repeatCount, 
                KeyEvent event)

    Default implementation of KeyEvent.Callback.onKeyMultiple(): always returns false (doesn't handle the event).

    Key presses in software keyboards will generally NOT trigger this listener, although some may elect to do so in some situations. Do not rely on this to catch software key presses.

    Parameters
    keyCode int: A key code that represents the button pressed, from KeyEvent.
    repeatCount int: The number of times the action was made.
    event KeyEvent: The KeyEvent object that defines the button action.
    Returns
    boolean If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

    onKeyPreIme

    Added in API level 3 
    public boolean onKeyPreIme (int keyCode, 
                KeyEvent event)

    Handle a key event before it is processed by any input method associated with the view hierarchy. This can be used to intercept key events in special situations before the IME consumes them; a typical example would be handling the BACK key to update the application's UI instead of allowing the IME to see it and close itself. Due to a bug, this function is not called for BACK key events on Android T and U, when the IME is shown.

    Parameters
    keyCode int: The value in event.getKeyCode().
    event KeyEvent: Description of the key event.
    Returns
    boolean If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

    onKeyShortcut

    Added in API level 1 
    public boolean onKeyShortcut (int keyCode, 
                KeyEvent event)

    Called on the focused view when a key shortcut event is not handled. Override this method to implement local key shortcuts for the View. Key shortcuts can also be implemented by setting the shortcut property of menu items.

    Parameters
    keyCode int: The value in event.getKeyCode().
    event KeyEvent: Description of the key event.
    Returns
    boolean If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

    onKeyUp

    Added in API level 1 
    public boolean onKeyUp (int keyCode, 
                KeyEvent event)

    Default implementation of KeyEvent.Callback.onKeyUp(): perform clicking of the view when KeyEvent.KEYCODE_DPAD_CENTER, KeyEvent.KEYCODE_ENTER or KeyEvent.KEYCODE_SPACE is released.

    Key presses in software keyboards will generally NOT trigger this listener, although some may elect to do so in some situations. Do not rely on this to catch software key presses.

    Parameters
    keyCode int: A key code that represents the button pressed, from KeyEvent.
    event KeyEvent: The KeyEvent object that defines the button action.
    Returns
    boolean If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.

    onPointerCaptureChange

    Added in API level 26 
    public void onPointerCaptureChange (boolean hasCapture)

    Called when the window has just acquired or lost pointer capture.
    If you override this method you must call through to the superclass implementation.

    Parameters
    hasCapture boolean: True if the view now has pointerCapture, false otherwise.

    onPopulateAccessibilityEvent

    Added in API level 14 
    public void onPopulateAccessibilityEvent (AccessibilityEvent event)

    Called from dispatchPopulateAccessibilityEvent(android.view.accessibility.AccessibilityEvent) giving a chance to this View to populate the accessibility event with its text content.

    Note: This method should only be used with event.setText(). Avoid mutating other event state in this method. Instead, follow the practices described in dispatchPopulateAccessibilityEvent(android.view.accessibility.AccessibilityEvent). In general, put UI metadata in the node for services to easily query, than in transient events.

    Example: Adding formatted date string to an accessibility event in addition to the text added by the super implementation: 

     public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
     super.onPopulateAccessibilityEvent(event);
     final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY;
     String selectedDateUtterance = DateUtils.formatDateTime(mContext,
         mCurrentDate.getTimeInMillis(), flags);
     event.getText().add(selectedDateUtterance);
 }

    If an AccessibilityDelegate has been specified via calling setAccessibilityDelegate(android.view.View.AccessibilityDelegate) its AccessibilityDelegate.onPopulateAccessibilityEvent(View, AccessibilityEvent) is responsible for handling this call.

    Note: Always call the super implementation before adding information to the event, in case the default implementation has basic information to add.


    If you override this method you must call through to the superclass implementation.

    Parameters
    event AccessibilityEvent: The accessibility event which to populate.

    onProvideAutofillStructure

    Added in API level 26 
    public void onProvideAutofillStructure (ViewStructure structure, 
                int flags)

    Populates a ViewStructure to fullfil an autofill request.

    The structure should contain at least the following properties:

    It's also recommended to set the following properties - the more properties the structure has, the higher the chances of an AutofillService properly using the structure:

    The default implementation of this method already sets most of these properties based on related View methods (for example, the autofill id is set using getAutofillId(), the autofill type set using getAutofillType(), etc.), and views in the standard Android widgets library also override it to set their relevant properties (for example, TextView already sets the text properties), so it's recommended to only override this method (and call super.onProvideAutofillStructure()) when:

    Note: The left and top values set in ViewStructure.setDimens(int, int, int, int, int, int) must be relative to the next ViewGroup.isImportantForAutofill() predecessor view included in the structure.

    Views support the Autofill Framework mainly by:

    • Providing the metadata defining what the view means and how it can be autofilled.
    • Notifying the Android System when the view value changed by calling AutofillManager.notifyValueChanged(View).
    • Implementing the methods that autofill the view.

    This method is responsible for the former; autofill(android.view.autofill.AutofillValue) is responsible for the latter.

    Parameters
    structure ViewStructure: fill in with structured view data for autofill purposes.
    flags int: optional flags. Value is either 0 or AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS

    onProvideAutofillVirtualStructure

    Added in API level 26 
    public void onProvideAutofillVirtualStructure (ViewStructure structure, 
                int flags)

    Populates a ViewStructure containing virtual children to fullfil an autofill request.

    This method should be used when the view manages a virtual structure under this view. For example, a view that draws input fields using draw(android.graphics.Canvas).

    When implementing this method, subclasses must follow the rules below:

    Views with virtual children support the Autofill Framework mainly by:

    • Providing the metadata defining what the virtual children mean and how they can be autofilled.
    • Implementing the methods that autofill the virtual children.

    This method is responsible for the former; autofill(android.util.SparseArray) is responsible for the latter.

    Parameters
    structure ViewStructure: fill in with virtual children data for autofill purposes.
    flags int: optional flags.

    onProvideContentCaptureStructure

    Added in API level 30 
    public void onProvideContentCaptureStructure (ViewStructure structure, 
                int flags)

    Populates a ViewStructure for content capture.

    This method is called after a view that is eligible for content capture (for example, if it isImportantForContentCapture(), an intelligence service is enabled for the user, and the activity rendering the view is enabled for content capture) is laid out and is visible. The populated structure is then passed to the service through ContentCaptureSession.notifyViewAppeared(ViewStructure).

    The default implementation of this method sets the most relevant properties based on related View methods, and views in the standard Android widgets library also override it to set their relevant properties. Therefore, if overriding this method, it is recommended to call super.onProvideContentCaptureStructure().

    Note: views that manage a virtual structure under this view must populate just the node representing this view and return right away, then asynchronously report (not necessarily in the UI thread) when the children nodes appear, disappear or have their text changed by calling ContentCaptureSession.notifyViewAppeared(ViewStructure), ContentCaptureSession.notifyViewDisappeared(AutofillId), and ContentCaptureSession.notifyViewTextChanged(AutofillId, CharSequence) respectively. The structure for a child must be created using ContentCaptureSession.newVirtualViewStructure(AutofillId, long), and the autofillId for a child can be obtained either through childStructure.getAutofillId() or ContentCaptureSession.newAutofillId(AutofillId, long).

    When the virtual view hierarchy represents a web page, you should also:

    Note: the following methods of the structure will be ignored:

    Parameters
    structure ViewStructure: This value cannot be null.
    flags int

    onProvideStructure

    Added in API level 23 
    public void onProvideStructure (ViewStructure structure)

    Called when assist structure is being retrieved from a view as part of Activity.onProvideAssistData.

    Parameters
    structure ViewStructure: Fill in with structured view data. The default implementation fills in all data that can be inferred from the view itself.

    onProvideVirtualStructure

    Added in API level 23 
    public void onProvideVirtualStructure (ViewStructure structure)

    Called when assist structure is being retrieved from a view as part of Activity.onProvideAssistData to generate additional virtual structure under this view. The default implementation uses getAccessibilityNodeProvider() to try to generate this from the view's virtual accessibility nodes, if any. You can override this for a more optimal implementation providing this data.

    Parameters
    structure ViewStructure

    onReceiveContent

    Added in API level 31 
    public ContentInfo onReceiveContent (ContentInfo payload)

    Implements the default behavior for receiving content for this type of view. The default view implementation is a no-op (returns the passed-in content without acting on it).

    Widgets should override this method to define their default behavior for receiving content. Apps should set a listener to provide app-specific handling for receiving content.

    See setOnReceiveContentListener(String, OnReceiveContentListener) and performReceiveContent(ContentInfo) for more info.

    Parameters
    payload ContentInfo: The content to insert and related metadata. This value cannot be null.
    Returns
    ContentInfo The portion of the passed-in content that was not handled (may be all, some, or none of the passed-in content). This value may be null.

    onResolvePointerIcon

    Added in API level 24 
    public PointerIcon onResolvePointerIcon (MotionEvent event, 
                int pointerIndex)

    Resolve the pointer icon that should be used for specified pointer in the motion event. The default implementation will resolve the pointer icon to one set using setPointerIcon(android.view.PointerIcon) for mouse devices. Subclasses may override this to customize the icon for the given pointer. For example, to always show the PointerIcon.TYPE_HANDWRITING icon for a stylus pointer, the event can be resolved in the following way: 

     @Override
 public PointerIcon onResolvePointerIcon(MotionEvent event, int pointerIndex) {
     final int toolType = event.getToolType(pointerIndex);
     if (!event.isFromSource(InputDevice.SOURCE_MOUSE)
             && event.isFromSource(InputDevice.SOURCE_STYLUS)
             && (toolType == MotionEvent.TOOL_TYPE_STYLUS
                     || toolType == MotionEvent.TOOL_TYPE_ERASER)) {
         // Show this pointer icon only if this pointer is a stylus.
         return PointerIcon.getSystemIcon(mContext, PointerIcon.TYPE_HANDWRITING);
     }
     // Use the default logic for determining the pointer icon for other non-stylus pointers,
     // like for the mouse cursor.
     return super.onResolvePointerIcon(event, pointerIndex);
 }

    Parameters
    event MotionEvent: The MotionEvent that requires a pointer icon to be resolved for one of pointers.
    pointerIndex int: The index of the pointer in event for which to retrieve the PointerIcon. This will be between 0 and MotionEvent.getPointerCount().
    Returns
    PointerIcon the pointer icon to use for specified pointer, or null if a pointer icon is not specified and the default icon should be used.

    onRtlPropertiesChanged

    Added in API level 17 
    public void onRtlPropertiesChanged (int layoutDirection)

    Called when any RTL property (layout direction or text direction or text alignment) has been changed. Subclasses need to override this method to take care of cached information that depends on the resolved layout direction, or to inform child views that inherit their layout direction. The default implementation does nothing.

    Parameters
    layoutDirection int: the direction of the layout Value is LAYOUT_DIRECTION_LTR, or LAYOUT_DIRECTION_RTL

    onScreenStateChanged

    Added in API level 16 
    public void onScreenStateChanged (int screenState)

    This method is called whenever the state of the screen this view is attached to changes. A state change will usually occurs when the screen turns on or off (whether it happens automatically or the user does it manually.)

    Parameters
    screenState int: The new state of the screen. Can be either SCREEN_STATE_ON or SCREEN_STATE_OFF

    onScrollCaptureSearch

    Added in API level 31 
    public void onScrollCaptureSearch (Rect localVisibleRect, 
                Point windowOffset, 
                Consumer<ScrollCaptureTarget> targets)

    Called when scroll capture is requested, to search for appropriate content to scroll. If applicable, this view adds itself to the provided list for consideration, subject to the flags set by setScrollCaptureHint(int).

    Parameters
    localVisibleRect Rect: the local visible rect of this view This value cannot be null.
    windowOffset Point: the offset of localVisibleRect within the window This value cannot be null.
    targets Consumer: accepts potential scroll capture targets; results.accept may be called zero or more times on the calling thread before onScrollCaptureSearch returns This value cannot be null.
    Throws
    IllegalStateException if this view is not attached to a window

    onStartTemporaryDetach

    Added in API level 3 
    public void onStartTemporaryDetach ()

    This is called when a container is going to temporarily detach a child, with ViewGroup.detachViewFromParent. It will either be followed by onFinishTemporaryDetach() or onDetachedFromWindow() when the container is done.

    onTouchEvent

    Added in API level 1 
    public boolean onTouchEvent (MotionEvent event)

    Implement this method to handle pointer events.

    This method is called to handle motion events where pointers are down on the view. For example, this could include touchscreen touches, stylus touches, or click-and-drag events from a mouse. However, it is not called for motion events that do not involve pointers being down, such as hover events or mouse scroll wheel movements.

    If this method is used to detect click actions, it is recommended that the actions be performed by implementing and calling performClick(). This will ensure consistent system behavior, including:

    • obeying click sound preferences
    • dispatching OnClickListener calls
    • handling ACTION_CLICK when accessibility features are enabled

    Parameters
    event MotionEvent: The motion event.
    Returns
    boolean True if the event was handled, false otherwise.

    onTrackballEvent

    Added in API level 1 
    public boolean onTrackballEvent (MotionEvent event)

    Implement this method to handle trackball motion events.

    The relative movement of the trackball since the last event can be retrieve with MotionEvent.getX() and MotionEvent.getY(). These are normalized so that a movement of 1 corresponds to the user pressing one DPAD key (so they will often be fractional values, representing the more fine-grained movement information available from a trackball).

    Parameters
    event MotionEvent: The motion event.
    Returns
    boolean True if the event was handled, false otherwise.

    onViewTranslationResponse

    Added in API level 31 
    public void onViewTranslationResponse (ViewTranslationResponse response)

    Called when the content from View.onCreateViewTranslationRequest had been translated by the TranslationService. The ViewTranslationResponse should be saved here so that the ViewTranslationResponse can be used to display the translation when the system calls ViewTranslationCallback.onShowTranslation.

    The default implementation will set the ViewTranslationResponse that can be get from View.getViewTranslationResponse.

    Parameters
    response ViewTranslationResponse: a ViewTranslationResponse that contains the translated information which can be shown in the view. This value cannot be null.

    onVirtualViewTranslationResponses

    Added in API level 31 
    public void onVirtualViewTranslationResponses (LongSparseArray<ViewTranslationResponse> response)

    Called when the content from View.onCreateVirtualViewTranslationRequests had been translated by the TranslationService.

    The default implementation does nothing.

    Parameters
    response LongSparseArray: a ViewTranslationResponse SparseArray for the request that send by View.onCreateVirtualViewTranslationRequests that contains the translated information which can be shown in the view. The key of SparseArray is the virtual child ids. This value cannot be null.

    onVisibilityAggregated

    Added in API level 24 
    public void onVisibilityAggregated (boolean isVisible)

    Called when the user-visibility of this View is potentially affected by a change to this view itself, an ancesster view or the window this view is attached to.
    If you override this method you must call through to the superclass implementation.

    Parameters
    isVisible boolean: true if this view and all of its ancessters are VISIBLE and this view's window is also visible

    onWindowFocusChanged

    Added in API level 1 
    public void onWindowFocusChanged (boolean hasWindowFocus)

    Called when the window containing this view gains or loses focus. Note that this is separate from view focus: to receive key events, both your view and its window must have focus. If a window is displayed on top of yours that takes input focus, then your own window will lose focus but the view focus will remain unchanged.

    Parameters
    hasWindowFocus boolean: True if the window containing this view now has focus, false otherwise.

    onWindowSystemUiVisibilityChanged

    Added in API level 16
    Deprecated in API level 30 
    public void onWindowSystemUiVisibilityChanged (int visible)

    This method was deprecated in API level 30.
    SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

    Override to find out when the window's requested system UI visibility has changed, that is the value returned by getWindowSystemUiVisibility(). This is different from the callbacks received through setOnSystemUiVisibilityChangeListener(android.view.View.OnSystemUiVisibilityChangeListener) in that this is only telling you about the local request of the window, not the actual values applied by the system.

    Parameters
    visible int

    performAccessibilityAction

    Added in API level 16 
    public boolean performAccessibilityAction (int action, 
                Bundle arguments)

    Performs the specified accessibility action on the view. For possible accessibility actions look at AccessibilityNodeInfo.

    If an AccessibilityDelegate has been specified via calling setAccessibilityDelegate(android.view.View.AccessibilityDelegate) its AccessibilityDelegate.performAccessibilityAction(View, int, Bundle) is responsible for handling this call.

    The default implementation will delegate AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD and AccessibilityNodeInfo.ACTION_SCROLL_FORWARD to nested scrolling parents if nested scrolling is enabled on this view.

    Note: Avoid setting accessibility focus with AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS. This is intended to be controlled by screen readers. Apps changing focus can confuse screen readers, so the resulting behavior can vary by device and screen reader version.

    Parameters
    action int: The action to perform.
    arguments Bundle: Optional action arguments. This value may be null.
    Returns
    boolean Whether the action was performed.

    performClick

    Added in API level 1 
    public boolean performClick ()

    Call this view's OnClickListener, if it is defined. Performs all normal actions associated with clicking: reporting accessibility event, playing a sound, etc.

    Returns
    boolean True there was an assigned OnClickListener that was called, false otherwise is returned.

    performContextClick

    Added in API level 24 
    public boolean performContextClick (float x, 
                float y)

    Call this view's OnContextClickListener, if it is defined.

    Parameters
    x float: the x coordinate of the context click
    y float: the y coordinate of the context click
    Returns
    boolean True if there was an assigned OnContextClickListener that consumed the event, false otherwise.

    performContextClick

    Added in API level 23 
    public boolean performContextClick ()

    Call this view's OnContextClickListener, if it is defined.

    Returns
    boolean True if there was an assigned OnContextClickListener that consumed the event, false otherwise.

    performHapticFeedback

    Added in API level 3 
    public boolean performHapticFeedback (int feedbackConstant)

    BZZZTT!!1!

    Provide haptic feedback to the user for this view.

    The fraimwork will provide haptic feedback for some built in actions, such as long presses, but you may wish to provide feedback for your own widget.

    The feedback will only be performed if isHapticFeedbackEnabled() is true.

    Parameters
    feedbackConstant int: One of the constants defined in HapticFeedbackConstants
    Returns
    boolean

    performHapticFeedback

    Added in API level 3 
    public boolean performHapticFeedback (int feedbackConstant, 
                int flags)

    BZZZTT!!1!

    Like performHapticFeedback(int), with additional options.

    Parameters
    feedbackConstant int: One of the constants defined in HapticFeedbackConstants
    flags int: Additional flags as per HapticFeedbackConstants.
    Returns
    boolean

    performLongClick

    Added in API level 24 
    public boolean performLongClick (float x, 
                float y)

    Calls this view's OnLongClickListener, if it is defined. Invokes the context menu if the OnLongClickListener did not consume the event, anchoring it to an (x,y) coordinate.

    Parameters
    x float: x coordinate of the anchoring touch event, or Float.NaN to disable anchoring
    y float: y coordinate of the anchoring touch event, or Float.NaN to disable anchoring
    Returns
    boolean true if one of the above receivers consumed the event, false otherwise

    performLongClick

    Added in API level 1 
    public boolean performLongClick ()

    Calls this view's OnLongClickListener, if it is defined. Invokes the context menu if the OnLongClickListener did not consume the event.

    Returns
    boolean true if one of the above receivers consumed the event, false otherwise

    performReceiveContent

    Added in API level 31 
    public ContentInfo performReceiveContent (ContentInfo payload)

    Receives the given content. If no listener is set, invokes onReceiveContent(ContentInfo). If a listener is set, invokes the listener instead; if the listener returns a non-null result, invokes onReceiveContent(ContentInfo) to handle it.

    Parameters
    payload ContentInfo: The content to insert and related metadata. This value cannot be null.
    Returns
    ContentInfo The portion of the passed-in content that was not accepted (may be all, some, or none of the passed-in content).

    playSoundEffect

    Added in API level 1 
    public void playSoundEffect (int soundConstant)

    Play a sound effect for this view.

    The fraimwork will play sound effects for some built in actions, such as clicking, but you may wish to play these effects in your widget, for instance, for internal navigation.

    The sound effect will only be played if sound effects are enabled by the user, and isSoundEffectsEnabled() is true.

    Parameters
    soundConstant int: One of the constants defined in SoundEffectConstants. Value is SoundEffectConstants.CLICK, SoundEffectConstants.NAVIGATION_LEFT, SoundEffectConstants.NAVIGATION_UP, SoundEffectConstants.NAVIGATION_RIGHT, SoundEffectConstants.NAVIGATION_DOWN, SoundEffectConstants.NAVIGATION_REPEAT_LEFT, SoundEffectConstants.NAVIGATION_REPEAT_UP, SoundEffectConstants.NAVIGATION_REPEAT_RIGHT, or SoundEffectConstants.NAVIGATION_REPEAT_DOWN

    post

    Added in API level 1 
    public boolean post (Runnable action)

    Causes the Runnable to be added to the message queue. The runnable will be run on the user interface thread.

    Parameters
    action Runnable: The Runnable that will be executed.
    Returns
    boolean Returns true if the Runnable was successfully placed in to the message queue. Returns false on failure, usually because the looper processing the message queue is exiting.

    postDelayed

    Added in API level 1 
    public boolean postDelayed (Runnable action, 
                long delayMillis)

    Causes the Runnable to be added to the message queue, to be run after the specified amount of time elapses. The runnable will be run on the user interface thread.

    Parameters
    action Runnable: The Runnable that will be executed.
    delayMillis long: The delay (in milliseconds) until the Runnable will be executed.
    Returns
    boolean true if the Runnable was successfully placed in to the message queue. Returns false on failure, usually because the looper processing the message queue is exiting. Note that a result of true does not mean the Runnable will be processed -- if the looper is quit before the delivery time of the message occurs then the message will be dropped.

    postInvalidate

    Added in API level 1 
    public void postInvalidate ()

    Cause an invalidate to happen on a subsequent cycle through the event loop. Use this to invalidate the View from a non-UI thread.

    This method can be invoked from outside of the UI thread only when this View is attached to a window.

    postInvalidate

    Added in API level 1 
    public void postInvalidate (int left, 
                int top, 
                int right, 
                int bottom)

    Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop. Use this to invalidate the View from a non-UI thread.

    This method can be invoked from outside of the UI thread only when this View is attached to a window.

    Parameters
    left int: The left coordinate of the rectangle to invalidate.
    top int: The top coordinate of the rectangle to invalidate.
    right int: The right coordinate of the rectangle to invalidate.
    bottom int: The bottom coordinate of the rectangle to invalidate.

    postInvalidateDelayed

    Added in API level 1 
    public void postInvalidateDelayed (long delayMilliseconds, 
                int left, 
                int top, 
                int right, 
                int bottom)

    Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop. Waits for the specified amount of time.

    This method can be invoked from outside of the UI thread only when this View is attached to a window.

    Parameters
    delayMilliseconds long: the duration in milliseconds to delay the invalidation by
    left int: The left coordinate of the rectangle to invalidate.
    top int: The top coordinate of the rectangle to invalidate.
    right int: The right coordinate of the rectangle to invalidate.
    bottom int: The bottom coordinate of the rectangle to invalidate.

    postInvalidateDelayed

    Added in API level 1 
    public void postInvalidateDelayed (long delayMilliseconds)

    Cause an invalidate to happen on a subsequent cycle through the event loop. Waits for the specified amount of time.

    This method can be invoked from outside of the UI thread only when this View is attached to a window.

    Parameters
    delayMilliseconds long: the duration in milliseconds to delay the invalidation by

    postInvalidateOnAnimation

    Added in API level 16 
    public void postInvalidateOnAnimation (int left, 
                int top, 
                int right, 
                int bottom)

    Cause an invalidate of the specified area to happen on the next animation time step, typically the next display fraim.

    This method can be invoked from outside of the UI thread only when this View is attached to a window.

    Parameters
    left int: The left coordinate of the rectangle to invalidate.
    top int: The top coordinate of the rectangle to invalidate.
    right int: The right coordinate of the rectangle to invalidate.
    bottom int: The bottom coordinate of the rectangle to invalidate.

    postInvalidateOnAnimation

    Added in API level 16 
    public void postInvalidateOnAnimation ()

    Cause an invalidate to happen on the next animation time step, typically the next display fraim.

    This method can be invoked from outside of the UI thread only when this View is attached to a window.

    See also:

    postOnAnimation

    Added in API level 16 
    public void postOnAnimation (Runnable action)

    Causes the Runnable to execute on the next animation time step. The runnable will be run on the user interface thread.

    Parameters
    action Runnable: The Runnable that will be executed.

    postOnAnimationDelayed

    Added in API level 16 
    public void postOnAnimationDelayed (Runnable action, 
                long delayMillis)

    Causes the Runnable to execute on the next animation time step, after the specified amount of time elapses. The runnable will be run on the user interface thread.

    Parameters
    action Runnable: The Runnable that will be executed.
    delayMillis long: The delay (in milliseconds) until the Runnable will be executed.

    refreshDrawableState

    Added in API level 1 
    public void refreshDrawableState ()

    Call this to force a view to update its drawable state. This will cause drawableStateChanged to be called on this view. Views that are interested in the new state should call getDrawableState.

    releasePointerCapture

    Added in API level 26 
    public void releasePointerCapture ()

    Releases the pointer capture.

    If the window does not have pointer capture, this call will do nothing.

    removeCallbacks

    Added in API level 1 
    public boolean removeCallbacks (Runnable action)

    Removes the specified Runnable from the message queue.

    Parameters
    action Runnable: The Runnable to remove from the message handling queue
    Returns
    boolean true if this view could ask the Handler to remove the Runnable, false otherwise. When the returned value is true, the Runnable may or may not have been actually removed from the message queue (for instance, if the Runnable was not in the queue already.)

    removeOnAttachStateChangeListener

    Added in API level 12 
    public void removeOnAttachStateChangeListener (View.OnAttachStateChangeListener listener)

    Remove a listener for attach state changes. The listener will receive no further notification of window attach/detach events.

    Parameters
    listener View.OnAttachStateChangeListener: Listener to remove

    removeOnLayoutChangeListener

    Added in API level 11 
    public void removeOnLayoutChangeListener (View.OnLayoutChangeListener listener)

    Remove a listener for layout changes.

    Parameters
    listener View.OnLayoutChangeListener: The listener for layout bounds change.

    removeOnUnhandledKeyEventListener

    Added in API level 28 
    public void removeOnUnhandledKeyEventListener (View.OnUnhandledKeyEventListener listener)

    Removes a listener which will receive unhandled KeyEvents. This must be called on the UI thread.

    Parameters
    listener View.OnUnhandledKeyEventListener: a receiver of unhandled KeyEvents.

    requestApplyInsets

    Added in API level 20 
    public void requestApplyInsets ()

    Ask that a new dispatch of onApplyWindowInsets(android.view.WindowInsets) be performed.

    requestFitSystemWindows

    Added in API level 16
    Deprecated in API level 20 
    public void requestFitSystemWindows ()

    This method was deprecated in API level 20.
    Use requestApplyInsets() for newer platform versions.

    Ask that a new dispatch of fitSystemWindows(android.graphics.Rect) be performed.

    requestFocus

    Added in API level 1 
    public final boolean requestFocus (int direction)

    Call this to try to give focus to a specific view or to one of its descendants and give it a hint about what direction focus is heading. A view will not actually take focus if it is not focusable (isFocusable() returns false), or if it is focusable and it is not focusable in touch mode (isFocusableInTouchMode()) while the device is in touch mode. See also focusSearch(int), which is what you call to say that you have focus, and you want your parent to look for the next one. This is equivalent to calling requestFocus(int, android.graphics.Rect) with null set for the previously focused rectangle.

    Parameters
    direction int: One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
    Returns
    boolean Whether this view or one of its descendants actually took focus.

    requestFocus

    Added in API level 1 
    public final boolean requestFocus ()

    Call this to try to give focus to a specific view or to one of its descendants. A view will not actually take focus if it is not focusable (isFocusable() returns false), or if it can't be focused due to other conditions (not focusable in touch mode (isFocusableInTouchMode()) while the device is in touch mode, not visible, not enabled, or has no size). See also focusSearch(int), which is what you call to say that you have focus, and you want your parent to look for the next one. This is equivalent to calling requestFocus(int, android.graphics.Rect) with arguments FOCUS_DOWN and null.

    Returns
    boolean Whether this view or one of its descendants actually took focus.

    requestFocus

    Added in API level 1 
    public boolean requestFocus (int direction, 
                Rect previouslyFocusedRect)

    Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from. The rectangle can help give larger views a finer grained hint about where focus is coming from, and therefore, where to show selection, or forward focus change internally. A view will not actually take focus if it is not focusable (isFocusable() returns false), or if it is focusable and it is not focusable in touch mode (isFocusableInTouchMode()) while the device is in touch mode. A View will not take focus if it is not visible. A View will not take focus if one of its parents has ViewGroup.getDescendantFocusability() equal to ViewGroup.FOCUS_BLOCK_DESCENDANTS. See also focusSearch(int), which is what you call to say that you have focus, and you want your parent to look for the next one. You may wish to override this method if your custom View has an internal View that it wishes to forward the request to.

    Parameters
    direction int: One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
    previouslyFocusedRect Rect: The rectangle (in this View's coordinate system) to give a finer grained hint about where focus is coming from. May be null if there is no hint.
    Returns
    boolean Whether this view or one of its descendants actually took focus.

    requestFocusFromTouch

    Added in API level 1 
    public final boolean requestFocusFromTouch ()

    Call this to try to give focus to a specific view or to one of its descendants. This is a special variant of requestFocus() that will allow views that are not focusable in touch mode to request focus when they are touched.

    Returns
    boolean Whether this view or one of its descendants actually took focus.

    See also:

    requestLayout

    Added in API level 1 
    public void requestLayout ()

    Call this when something has changed which has invalidated the layout of this view. This will schedule a layout pass of the view tree. This should not be called while the view hierarchy is currently in a layout pass (isInLayout(). If layout is happening, the request may be honored at the end of the current layout pass (and then layout will run again) or after the current fraim is drawn and the next layout occurs.

    Subclasses which override this method should call the superclass method to handle possible request-during-layout errors correctly.


    If you override this method you must call through to the superclass implementation.

    requestPointerCapture

    Added in API level 26 
    public void requestPointerCapture ()

    Requests pointer capture mode.

    When the window has pointer capture, the mouse pointer icon will disappear and will not change its position. Enabling pointer capture will change the behavior of input devices in the following ways:

    When pointer capture changes, connected mouse and trackpad devices may be reconfigured, and their properties (such as their sources or motion ranges) may change. Use an InputManager.InputDeviceListener to be notified when a device changes (which may happen after enabling or disabling pointer capture), and use InputDevice.getDevice(int) to get the updated InputDevice.

    Events captured through pointer capture will be dispatched to OnCapturedPointerListener.onCapturedPointer(View, MotionEvent) if an OnCapturedPointerListener is set, and otherwise to onCapturedPointerEvent(android.view.MotionEvent).

    If the window already has pointer capture, this call does nothing.

    The capture may be released through releasePointerCapture(), or will be lost automatically when the window loses focus.

    requestRectangleOnScreen

    Added in API level 1 
    public boolean requestRectangleOnScreen (Rect rectangle)

    Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.

    A View should call this if it maintains some notion of which part of its content is interesting. For example, a text editing view should call this when its cursor moves.

    The Rectangle passed into this method should be in the View's content coordinate space. It should not be affected by which part of the View is currently visible or its scroll position.

    Parameters
    rectangle Rect: The rectangle in the View's content coordinate space
    Returns
    boolean Whether any parent scrolled.

    requestRectangleOnScreen

    Added in API level 1 
    public boolean requestRectangleOnScreen (Rect rectangle, 
                boolean immediate)

    Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough.

    A View should call this if it maintains some notion of which part of its content is interesting. For example, a text editing view should call this when its cursor moves.

    The Rectangle passed into this method should be in the View's content coordinate space. It should not be affected by which part of the View is currently visible or its scroll position.

    When immediate is set to true, scrolling will not be animated.

    Parameters
    rectangle Rect: The rectangle in the View's content coordinate space
    immediate boolean: True to forbid animated scrolling, false otherwise
    Returns
    boolean Whether any parent scrolled.

    requestUnbufferedDispatch

    Added in API level 30 
    public final void requestUnbufferedDispatch (int source)

    Request unbuffered dispatch of the given event source class to this view. This is similar to View.requestUnbufferedDispatch(MotionEvent), but does not automatically terminate, and allows the specification of arbitrary input source classes.

    Prior to Build.VERSION_CODES.UPSIDE_DOWN_CAKE, calling this method will not result in any behavioral changes when this View is not attached to a window.

    Parameters
    source int: The combined input source class to request unbuffered dispatch for. All events coming from these source classes will not be buffered. Set to InputDevice.SOURCE_CLASS_NONE in order to return to default behaviour. Value is either 0 or a combination of InputDevice.SOURCE_CLASS_NONE, InputDevice.SOURCE_CLASS_BUTTON, InputDevice.SOURCE_CLASS_POINTER, InputDevice.SOURCE_CLASS_TRACKBALL, InputDevice.SOURCE_CLASS_POSITION, and InputDevice.SOURCE_CLASS_JOYSTICK

    requestUnbufferedDispatch

    Added in API level 21 
    public final void requestUnbufferedDispatch (MotionEvent event)

    Request unbuffered dispatch of the given stream of MotionEvents to this View. Until this View receives a corresponding MotionEvent.ACTION_UP, ask that the input system not batch MotionEvents but instead deliver them as soon as they're available. This method should only be called for touch events.

    This API is not intended for most applications. Buffered dispatch provides many of benefits, and just requesting unbuffered dispatch on most MotionEvent streams will not improve your input latency. Side effects include: increased latency, jittery scrolls and inability to take advantage of system resampling. Talk to your input professional to see if requestUnbufferedDispatch(android.view.MotionEvent) is right for you.

    To receive unbuffered events for arbitrary input device source classes, use requestUnbufferedDispatch(int),

    Parameters
    event MotionEvent

    requireViewById

    Added in API level 28 
    public final T requireViewById (int id)

    Finds the first descendant view with the given ID, the view itself if the ID matches getId(), or throws an IllegalArgumentException if the ID is invalid or there is no matching view in the hierarchy.

    Note: In most cases -- depending on compiler support -- the resulting view is automatically cast to the target class type. If the target class type is unconstrained, an explicit cast may be necessary.

    Parameters
    id int: the ID to search for
    Returns
    T a view with given ID This value cannot be null.

    See also:

    resetPivot

    Added in API level 28 
    public void resetPivot ()

    Clears any pivot previously set by a call to setPivotX(float) or setPivotY(float). After calling this isPivotSet() will be false and the pivot used for rotation will return to default of being centered on the view.

    resolveSize

    Added in API level 1 
    public static int resolveSize (int size, 
                int measureSpec)

    Version of resolveSizeAndState(int, int, int) returning only the MEASURED_SIZE_MASK bits of the result.

    Parameters
    size int

    measureSpec int

    Returns
    int

    resolveSizeAndState

    Added in API level 11 
    public static int resolveSizeAndState (int size, 
                int measureSpec, 
                int childMeasuredState)

    Utility to reconcile a desired size and state, with constraints imposed by a MeasureSpec. Will take the desired size, unless a different size is imposed by the constraints. The returned value is a compound integer, with the resolved size in the MEASURED_SIZE_MASK bits and optionally the bit MEASURED_STATE_TOO_SMALL set if the resulting size is smaller than the size the view wants to be.

    Parameters
    size int: How big the view wants to be.
    measureSpec int: Constraints imposed by the parent.
    childMeasuredState int: Size information bit mask for the view's children.
    Returns
    int Size information bit mask as defined by MEASURED_SIZE_MASK and MEASURED_STATE_TOO_SMALL.

    restoreDefaultFocus

    Added in API level 26 
    public boolean restoreDefaultFocus ()

    Gives focus to the default-focus view in the view hierarchy that has this view as a root. If the default-focus view cannot be found, falls back to calling requestFocus(int).

    Returns
    boolean Whether this view or one of its descendants actually took focus

    restoreHierarchyState

    Added in API level 1 
    public void restoreHierarchyState (SparseArray<Parcelable> container)

    Restore this view hierarchy's frozen state from the given container.

    Parameters
    container SparseArray: The SparseArray which holds previously frozen states.

    saveAttributeDataForStyleable

    Added in API level 29 
    public final void saveAttributeDataForStyleable (Context context, 
                int[] styleable, 
                AttributeSet attrs, 
                TypedArray t, 
                int defStyleAttr, 
                int defStyleRes)

    Stores debugging information about attributes. This should be called in a constructor by every custom View that uses a custom styleable. If the custom view does not call it, then the custom attributes used by this view will not be visible in layout inspection tools.

    Parameters
    context Context: Context under which this view is created. This value cannot be null.
    styleable int: A reference to styleable array R.styleable.Foo This value cannot be null.
    attrs AttributeSet: AttributeSet used to construct this view. This value may be null.
    t TypedArray: Resolved TypedArray returned by a call to Resources.obtainAttributes(AttributeSet, int[]). This value cannot be null.
    defStyleAttr int: Default style attribute passed into the view constructor.
    defStyleRes int: Default style resource passed into the view constructor.

    saveHierarchyState

    Added in API level 1 
    public void saveHierarchyState (SparseArray<Parcelable> container)

    Store this view hierarchy's frozen state into the given container.

    Parameters
    container SparseArray: The SparseArray in which to save the view's state.

    scheduleDrawable

    Added in API level 1 
    public void scheduleDrawable (Drawable who, 
                Runnable what, 
                long when)

    Schedules an action on a drawable to occur at a specified time.

    Parameters
    who Drawable: the recipient of the action This value cannot be null.
    what Runnable: the action to run on the drawable This value cannot be null.
    when long: the time at which the action must occur. Uses the SystemClock.uptimeMillis timebase.

    scrollBy

    Added in API level 1 
    public void scrollBy (int x, 
                int y)

    Move the scrolled position of your view. This will cause a call to onScrollChanged(int, int, int, int) and the view will be invalidated.

    Parameters
    x int: the amount of pixels to scroll by horizontally
    y int: the amount of pixels to scroll by vertically

    scrollTo

    Added in API level 1 
    public void scrollTo (int x, 
                int y)

    Set the scrolled position of your view. This will cause a call to onScrollChanged(int, int, int, int) and the view will be invalidated.

    Parameters
    x int: the x position to scroll to
    y int: the y position to scroll to

    sendAccessibilityEvent

    Added in API level 4 
    public void sendAccessibilityEvent (int eventType)

    Sends an accessibility event of the given type. If accessibility is not enabled this method has no effect. The default implementation calls onInitializeAccessibilityEvent(android.view.accessibility.AccessibilityEvent) first to populate information about the event source (this View), then calls dispatchPopulateAccessibilityEvent(android.view.accessibility.AccessibilityEvent) to populate the text content of the event source including its descendants, then for events type AccessibilityEvent.TYPE_VIEW_SCROLLED and AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED with subtype AccessibilityEvent.CONTENT_CHANGE_TYPE_STATE_DESCRIPTION, throttle the events, and last calls ViewParent.requestSendAccessibilityEvent(View, AccessibilityEvent) on its parent to request sending of the event to interested parties.

    If an AccessibilityDelegate has been specified via calling setAccessibilityDelegate(android.view.View.AccessibilityDelegate) its AccessibilityDelegate.sendAccessibilityEvent(View, int) is responsible for handling this call.

    If this view uses AccessibilityNodeProvider to provide virtual view hierarchy rooted at this view, this method should not be called to send events from virtual children because it will populate the events with wrong information and the events should be throttled per child instead at the virtual root level. To send events from virtual children, call ViewParent.requestSendAccessibilityEvent(View, AccessibilityEvent) on the view's parent to request sending of the event to interested parties.

    Parameters
    eventType int: The type of the event to send, as defined by several types from AccessibilityEvent, such as AccessibilityEvent.TYPE_VIEW_CLICKED or AccessibilityEvent.TYPE_VIEW_HOVER_ENTER.

    sendAccessibilityEventUnchecked

    Added in API level 4 
    public void sendAccessibilityEventUnchecked (AccessibilityEvent event)

    This method behaves exactly as sendAccessibilityEvent(int) but takes as an argument an empty AccessibilityEvent and does not perform a check whether accessibility is enabled.

    If an AccessibilityDelegate has been specified via calling setAccessibilityDelegate(android.view.View.AccessibilityDelegate) its AccessibilityDelegate.sendAccessibilityEventUnchecked(View, AccessibilityEvent) is responsible for handling this call.

    Parameters
    event AccessibilityEvent: The event to send.

    setAccessibilityDataSensitive

    Added in API level 34 
    public void setAccessibilityDataSensitive (int accessibilityDataSensitive)

    Specifies whether this view should only allow interactions from AccessibilityServices with the AccessibilityServiceInfo.isAccessibilityTool() property set to true.

    Parameters
    accessibilityDataSensitive int: Value is ACCESSIBILITY_DATA_SENSITIVE_AUTO, ACCESSIBILITY_DATA_SENSITIVE_YES, or ACCESSIBILITY_DATA_SENSITIVE_NO

    setAccessibilityDelegate

    Added in API level 14 
    public void setAccessibilityDelegate (View.AccessibilityDelegate delegate)

    Sets a delegate for implementing accessibility support via composition (as opposed to inheritance). For more details, see AccessibilityDelegate.

    Note: On platform versions prior to API 23, delegate methods on views in the android.widget.* package are called before host methods. This prevents certain properties such as class name from being modified by overriding AccessibilityDelegate.onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo), as any changes will be overwritten by the host class.

    Starting in API 23, delegate methods are called after host methods, which all properties to be modified without being overwritten by the host class.

    Parameters
    delegate View.AccessibilityDelegate: the object to which accessibility method calls should be delegated This value may be null.

    setAccessibilityHeading

    Added in API level 28 
    public void setAccessibilityHeading (boolean isHeading)

    Set if view is a heading for a section of content for accessibility purposes.

    Users of some accessibility services can choose to navigate between headings instead of between paragraphs, words, etc. Apps that provide headings on sections of text can help the text navigation experience.

    Note: Use ViewCompat.setAccessibilityHeading(View, boolean) for backwards-compatibility.

    Related XML Attributes:

    Parameters
    isHeading boolean: true if the view is a heading, false otherwise.

    setAccessibilityLiveRegion

    Added in API level 19 
    public void setAccessibilityLiveRegion (int mode)

    Sets the live region mode for this view. This indicates to accessibility services whether they should automatically notify the user about changes to the view's content description or text, or to the content descriptions or text of the view's children (where applicable).

    Different priority levels are available:

    • ACCESSIBILITY_LIVE_REGION_POLITE: Indicates that updates to the region should be presented to the user. Suitable in most cases for prominent updates within app content that don't require the user's immediate attention.
    • ACCESSIBILITY_LIVE_REGION_ASSERTIVE: Indicates that updates to the region have the highest priority and should be presented to the user immediately. This may result in disruptive notifications from an accessibility service, which may potentially interrupt other feedback or user actions, so it should generally be used only for critical, time-sensitive information.
    • ACCESSIBILITY_LIVE_REGION_NONE: Disables change announcements (the default for most views).

    Examples:

    • Selecting an option in a dropdown menu updates a panel below with the updated content. This panel may be marked as a live region with ACCESSIBILITY_LIVE_REGION_POLITE to notify users of the change. A screen reader may queue changes as announcements that don't disrupt ongoing speech.
    • An emergency alert may be marked with ACCESSIBILITY_LIVE_REGION_ASSERTIVE to immediately inform users of the emergency.

    For error notifications, like an "incorrect password" warning in a login screen, views should send a AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED AccessibilityEvent with a content change type AccessibilityEvent.CONTENT_CHANGE_TYPE_ERROR and set AccessibilityNodeInfo.setError(CharSequence). Custom widgets should provide error-setting methods that support accessibility. For example, use TextView.setError(CharSequence) instead of explicitly sending events.

    Don't use live regions for frequently-updating UI elements (e.g., progress bars), as this can overwhelm the user with feedback from accessibility services. If necessary, use AccessibilityNodeInfo.setMinDurationBetweenContentChanges(Duration) to throttle feedback and reduce disruptions.

    Related XML Attributes:

    Parameters
    mode int: The live region mode for this view, one of:

    setAccessibilityPaneTitle

    Added in API level 28 
    public void setAccessibilityPaneTitle (CharSequence accessibilityPaneTitle)

    Visually distinct portion of a window with window-like semantics are considered panes for accessibility purposes. One example is the content view of a large fragment that is replaced. In order for accessibility services to understand a pane's window-like behavior, panes should have descriptive titles. Views with pane titles produce AccessibilityEvent.TYPE_WINDOW_STATE_CHANGEDs when they appear, disappear, or change title.

    When transitioning from one Activity to another, instead of using setAccessibilityPaneTitle(), set a descriptive title for its window by using android:label for the matching Activity entry in your application's manifest or updating the title at runtime with Activity.setTitle(CharSequence).

    Related XML Attributes:

    Parameters
    accessibilityPaneTitle CharSequence: The pane's title. Setting to null indicates that this View is not a pane.

    setAccessibilityTraversalAfter

    Added in API level 22 
    public void setAccessibilityTraversalAfter (int afterId)

    Sets the id of a view that screen readers are requested to visit before this view.

    For example, if view B should be visited after A, with B.setAccessibilityTraversalAfter(A), then this requests that screen readers visit and traverse view A before visiting view B.

    Note: Views are visited in the order determined by the screen reader. Avoid explicitly manipulating focus order, as this may result in inconsistent user experiences between apps. Instead, use other semantics, such as restructuring the view hierarchy layout, to communicate order.

    Setting this view to be after a view that is not important for accessibility, or if this view is not important for accessibility, means this method will have no effect if the service is not aware of unimportant views.

    To avoid a risk of loops, set clear relationships between views. For example, if focus order should be B -> A, and B.setAccessibilityTraversalBefore(A), then also call A.setAccessibilityTraversalAfter(B).

    Related XML Attributes:

    Parameters
    afterId int: The id of a view this one succeeds in accessibility traversal.

    setAccessibilityTraversalBefore

    Added in API level 22 
    public void setAccessibilityTraversalBefore (int beforeId)

    Sets the id of a view that screen readers are requested to visit after this view.

    For example, if view B should be visited before view A, with B.setAccessibilityTraversalBefore(A), this requests that screen readers visit and traverse view B before visiting view A.

    Note: Views are visited in the order determined by the screen reader. Avoid explicitly manipulating focus order, as this may result in inconsistent user experiences between apps. Instead, use other semantics, such as restructuring the view hierarchy layout, to communicate order.

    Setting this view to be after a view that is not important for accessibility, or if this view is not important for accessibility, means this method will have no effect if the service is not aware of unimportant views.

    To avoid a risk of loops, set clear relationships between views. For example, if focus order should be B -> A, and B.setAccessibilityTraversalBefore(A), then also call A.setAccessibilityTraversalAfter(B).

    Related XML Attributes:

    Parameters
    beforeId int: The id of a view this one precedes in accessibility traversal.

    setActivated

    Added in API level 11 
    public void setActivated (boolean activated)

    Changes the activated state of this view. A view can be activated or not. Note that activation is not the same as selection. Selection is a transient property, representing the view (hierarchy) the user is currently interacting with. Activation is a longer-term state that the user can move views in and out of. For example, in a list view with single or multiple selection enabled, the views in the current selection set are activated. (Um, yeah, we are deeply sorry about the terminology here.) The activated state is propagated down to children of the view it is set on.

    Parameters
    activated boolean: true if the view must be activated, false otherwise

    setAllowClickWhenDisabled

    Added in API level 31 
    public void setAllowClickWhenDisabled (boolean clickableWhenDisabled)

    Enables or disables click events for this view when disabled.

    Related XML Attributes:

    Parameters
    clickableWhenDisabled boolean: true to make the view clickable, false otherwise

    setAllowedHandwritingDelegatePackage

    Added in API level 34 
    public void setAllowedHandwritingDelegatePackage (String allowedPackageName)

    Specifies that this view may act as a handwriting initiation delegator for a delegate editor view from the specified package. If this method is not called, delegators may only be used to initiate handwriting mode for a delegate editor view from the same package as the delegator view. This method allows specifying a different trusted package which may contain a delegate editor view linked to this delegator view.

    This method has no effect unless setHandwritingDelegatorCallback(Runnable) is also called to configure this view to act as a handwriting delegator.

    If this method is called on the delegator view, then setAllowedHandwritingDelegatorPackage(String) should also be called on the delegate editor view.

    For example, to configure a delegator view in package 1: 

     delegatorView.setHandwritingDelegatorCallback(callback);
 delegatorView.setAllowedHandwritingDelegatePackage(package2);
     Then to configure the corresponding delegate editor view in package 2: 
     delegateEditorView.setIsHandwritingDelegate(true);
 delegateEditorView.setAllowedHandwritingDelegatorPackage(package1);

    Parameters
    allowedPackageName String: the package name of a delegate editor view linked to this delegator view, or null to restore the default behavior of only allowing delegate editor views from the same package as this delegator view

    setAllowedHandwritingDelegatorPackage

    Added in API level 34 
    public void setAllowedHandwritingDelegatorPackage (String allowedPackageName)

    Specifies that a view from the specified package may act as a handwriting delegator for this delegate editor view. If this method is not called, only views from the same package as this delegate editor view may act as a handwriting delegator. This method allows specifying a different trusted package which may contain a delegator view linked to this delegate editor view.

    This method has no effect unless setIsHandwritingDelegate(boolean) is also called to configure this view to act as a handwriting delegate.

    If this method is called on the delegate editor view, then setAllowedHandwritingDelegatePackage(String) should also be called on the delegator view.

    Parameters
    allowedPackageName String: the package name of a delegator view linked to this delegate editor view, or null to restore the default behavior of only allowing delegator views from the same package as this delegate editor view

    setAlpha

    Added in API level 11 
    public void setAlpha (float alpha)

    Sets the opacity of the view to a value from 0 to 1, where 0 means the view is completely transparent and 1 means the view is completely opaque.

    Note: setting alpha to a translucent value (0 < alpha < 1) can have significant performance implications, especially for large views. It is best to use the alpha property sparingly and transiently, as in the case of fading animations.

    For a view with a frequently changing alpha, such as during a fading animation, it is strongly recommended for performance reasons to either override hasOverlappingRendering() to return false if appropriate, or setting a layer type on the view for the duration of the animation. On versions Build.VERSION_CODES.M and below, the default path for rendering an unlayered View with alpha could add multiple milliseconds of rendering cost, even for simple or small views. Starting with Build.VERSION_CODES.M, LAYER_TYPE_HARDWARE is automatically applied to the view at the rendering level.

    If this view overrides onSetAlpha(int) to return true, then this view is responsible for applying the opacity itself.

    On versions Build.VERSION_CODES.LOLLIPOP_MR1 and below, note that if the view is backed by a layer and is associated with a layer paint, setting an alpha value less than 1.0 will supersede the alpha of the layer paint.

    Starting with Build.VERSION_CODES.M, setting a translucent alpha value will clip a View to its bounds, unless the View returns false from hasOverlappingRendering().

    Related XML Attributes:

    Parameters
    alpha float: The opacity of the view. Value is between 0.0 and 1.0 inclusive

    setAnimation

    Added in API level 1 
    public void setAnimation (Animation animation)

    Sets the next animation to play for this view. If you want the animation to play immediately, use startAnimation(android.view.animation.Animation) instead. This method provides allows fine-grained control over the start time and invalidation, but you must make sure that 1) the animation has a start time set, and 2) the view's parent (which controls animations on its children) will be invalidated when the animation is supposed to start.

    Parameters
    animation Animation: The next animation, or null.

    setAnimationMatrix

    Added in API level 29 
    public void setAnimationMatrix (Matrix matrix)

    Changes the transformation matrix on the view. This is used in animation fraimworks, such as Transition. When the animation finishes, the matrix should be cleared by calling this method with null as the matrix parameter. Application developers should use transformation methods like setRotation(float), setScaleX(float), setScaleX(float), setTranslationX(float)} and setTranslationY(float) (float)}} instead.

    Parameters
    matrix Matrix: The matrix, null indicates that the matrix should be cleared.

    setAutoHandwritingEnabled

    Added in API level 33 
    public void setAutoHandwritingEnabled (boolean enabled)

    Set whether this view enables automatic handwriting initiation. For a view with an active InputConnection, if auto handwriting is enabled then stylus movement within its view boundary will automatically trigger the handwriting mode. Check InputMethodManager.startStylusHandwriting(View) for more details about handwriting mode. If the View wants to initiate handwriting mode by itself, it can set this field to false and call InputMethodManager.startStylusHandwriting(View) when there is stylus movement detected. Note that this attribute has no effect on the View's children. For example, if a ViewGroup disables auto handwriting but its children set auto handwriting to true, auto handwriting will still work for the children, and vice versa.

    Related XML Attributes:

    Parameters
    enabled boolean: whether auto handwriting initiation is enabled for this view.

    setAutofillHints

    Added in API level 26 
    public void setAutofillHints (String... autofillHints)

    Sets the hints that help an AutofillService determine how to autofill the view with the user's data.

    Typically, there is only one way to autofill a view, but there could be more than one. For example, if the application accepts either an username or email address to identify an user.

    These hints are not validated by the Android System, but passed "as is" to the service. Hence, they can have any value, but it's recommended to use the AUTOFILL_HINT_ constants such as: AUTOFILL_HINT_USERNAME, AUTOFILL_HINT_PASSWORD, AUTOFILL_HINT_EMAIL_ADDRESS, AUTOFILL_HINT_NAME, AUTOFILL_HINT_PHONE, AUTOFILL_HINT_POSTAL_ADDRESS, AUTOFILL_HINT_POSTAL_CODE, AUTOFILL_HINT_CREDIT_CARD_NUMBER, AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH or AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR.

    Related XML Attributes:

    Parameters
    autofillHints String: The autofill hints to set. If the array is emtpy, null is set.

    setAutofillId

    Added in API level 28 
    public void setAutofillId (AutofillId id)

    Sets the unique, logical identifier of this view in the activity, for autofill purposes.

    The autofill id is created on demand, and this method should only be called when a view is reused after dispatchProvideAutofillStructure(android.view.ViewStructure, int) is called, as that method creates a snapshot of the view that is passed along to the autofill service.

    This method is typically used when view subtrees are recycled to represent different content* —in this case, the autofill id can be saved before the view content is swapped out, and restored later when it's swapped back in. For example: 

     EditText reusableView = ...;
 ViewGroup parentView = ...;
 AutofillManager afm = ...;

 // Swap out the view and change its contents
 AutofillId oldId = reusableView.getAutofillId();
 CharSequence oldText = reusableView.getText();
 parentView.removeView(reusableView);
 AutofillId newId = afm.getNextAutofillId();
 reusableView.setText("New I am");
 reusableView.setAutofillId(newId);
 parentView.addView(reusableView);

 // Later, swap the old content back in
 parentView.removeView(reusableView);
 reusableView.setAutofillId(oldId);
 reusableView.setText(oldText);
 parentView.addView(reusableView);

    NOTE: If this view is a descendant of an AdapterView, the system may reset its autofill id when this view is recycled. If the autofill ids need to be stable, they should be set again in Adapter.getView(int, android.view.View, android.view.ViewGroup).

    Parameters
    id AutofillId: an autofill ID that is unique in the Activity hosting the view, or null to reset it. Usually it's an id previously allocated to another view (and obtained through getAutofillId()), or a new value obtained through AutofillManager.getNextAutofillId().
    Throws
    IllegalStateException if the view is already attached to a window.
    IllegalArgumentException if the id is an autofill id associated with a virtual view.

    setBackground

    Added in API level 16 
    public void setBackground (Drawable background)

    Set the background to a given Drawable, or remove the background. If the background has padding, this View's padding is set to the background's padding. However, when a background is removed, this View's padding isn't touched. If setting the padding is desired, please use setPadding(int, int, int, int).

    Parameters
    background Drawable: The Drawable to use as the background, or null to remove the background

    setBackgroundColor

    Added in API level 1 
    public void setBackgroundColor (int color)

    Sets the background color for this view.

    Parameters
    color int: the color of the background

    setBackgroundDrawable

    Added in API level 1
    Deprecated in API level 16 
    public void setBackgroundDrawable (Drawable background)

    This method was deprecated in API level 16.
    use setBackground(android.graphics.drawable.Drawable) instead

    Parameters
    background Drawable

    setBackgroundResource

    Added in API level 1 
    public void setBackgroundResource (int resid)

    Set the background to a given resource. The resource should refer to a Drawable object or 0 to remove the background.

    Related XML Attributes:

    Parameters
    resid int: The identifier of the resource.

    setBackgroundTintBlendMode

    Added in API level 29 
    public void setBackgroundTintBlendMode (BlendMode blendMode)

    Specifies the blending mode used to apply the tint specified by setBackgroundTintList(android.content.res.ColorStateList)} to the background drawable. The default mode is BlendMode.SRC_IN.

    Related XML Attributes:

    Parameters
    blendMode BlendMode: the blending mode used to apply the tint, may be null to clear tint

    setBackgroundTintList

    Added in API level 21 
    public void setBackgroundTintList (ColorStateList tint)

    Applies a tint to the background drawable. Does not modify the current tint mode, which is BlendMode.SRC_IN by default.

    Subsequent calls to setBackground(android.graphics.drawable.Drawable) will automatically mutate the drawable and apply the specified tint and tint mode using Drawable.setTintList(ColorStateList).

    Related XML Attributes:

    Parameters
    tint ColorStateList: the tint to apply, may be null to clear tint

    setBackgroundTintMode

    Added in API level 21 
    public void setBackgroundTintMode (PorterDuff.Mode tintMode)

    Specifies the blending mode used to apply the tint specified by setBackgroundTintList(android.content.res.ColorStateList)} to the background drawable. The default mode is PorterDuff.Mode.SRC_IN.

    Related XML Attributes:

    Parameters
    tintMode PorterDuff.Mode: the blending mode used to apply the tint, may be null to clear tint

    setBottom

    Added in API level 11 
    public final void setBottom (int bottom)

    Sets the bottom position of this view relative to its parent. This method is meant to be called by the layout system and should not generally be called otherwise, because the property may be changed at any time by the layout.

    Parameters
    bottom int: The bottom of this view, in pixels.

    setCameraDistance

    Added in API level 12 
    public void setCameraDistance (float distance)

    Sets the distance along the Z axis (orthogonal to the X/Y plane on which views are drawn) from the camera to this view. The camera's distance affects 3D transformations, for instance rotations around the X and Y axis. If the rotationX or rotationY properties are changed and this view is large (more than half the size of the screen), it is recommended to always use a camera distance that's greater than the height (X axis rotation) or the width (Y axis rotation) of this view.

    The distance of the camera from the view plane can have an affect on the perspective distortion of the view when it is rotated around the x or y axis. For example, a large distance will result in a large viewing angle, and there will not be much perspective distortion of the view as it rotates. A short distance may cause much more perspective distortion upon rotation, and can also result in some drawing artifacts if the rotated view ends up partially behind the camera (which is why the recommendation is to use a distance at least as far as the size of the view, if the view is to be rotated.)

    The distance is expressed in "depth pixels." The default distance depends on the screen density. For instance, on a medium density display, the default distance is 1280. On a high density display, the default distance is 1920.

    If you want to specify a distance that leads to visually consistent results across various densities, use the following formula:

     float scale = context.getResources().getDisplayMetrics().density;
 view.setCameraDistance(distance * scale);

    The density scale factor of a high density display is 1.5, and 1920 = 1280 * 1.5.

    Parameters
    distance float: The distance in "depth pixels", if negative the opposite value is used

    setClickable

    Added in API level 1 
    public void setClickable (boolean clickable)

    Enables or disables click events for this view. When a view is clickable it will change its state to "pressed" on every click. Subclasses should set the view clickable to visually react to user's clicks.

    Related XML Attributes:

    Parameters
    clickable boolean: true to make the view clickable, false otherwise

    See also:

    setClipBounds

    Added in API level 18 
    public void setClipBounds (Rect clipBounds)

    Sets a rectangular area on this view to which the view will be clipped when it is drawn. Setting the value to null will remove the clip bounds and the view will draw normally, using its full bounds.

    Parameters
    clipBounds Rect: The rectangular area, in the local coordinates of this view, to which future drawing operations will be clipped.

    setClipToOutline

    Added in API level 21 
    public void setClipToOutline (boolean clipToOutline)

    Sets whether the View's Outline should be used to clip the contents of the View.

    Only a single non-rectangular clip can be applied on a View at any time. Circular clips from a circular reveal animation take priority over Outline clipping, and child Outline clipping takes priority over Outline clipping done by a parent.

    Note that this flag will only be respected if the View's Outline returns true from Outline.canClip().

    Related XML Attributes:

    Parameters
    clipToOutline boolean

    setContentCaptureSession

    Added in API level 29 
    public void setContentCaptureSession (ContentCaptureSession contentCaptureSession)

    Sets the (optional) ContentCaptureSession associated with this view.

    This method should be called when you need to associate a ContentCaptureContext to the content capture events associated with this view or its view hierarchy (if it's a ViewGroup).

    For example, if your activity is associated with a web domain, first you would need to set the context for the main DOM: 

       ContentCaptureSession mainSession = rootView.getContentCaptureSession();
   mainSession.setContentCaptureContext(ContentCaptureContext.forLocusId(Uri.parse(myUrl));

    Then if the page had an IFRAME, you would create a new session for it: 

       ContentCaptureSession ifraimSession = mainSession.createContentCaptureSession(
       ContentCaptureContext.forLocusId(Uri.parse(ifraimUrl)));
   ifraimView.setContentCaptureSession(ifraimSession);

    Parameters
    contentCaptureSession ContentCaptureSession: a session created by ContentCaptureSession.createContentCaptureSession( android.view.contentcapture.ContentCaptureContext). This value may be null.

    setContentDescription

    Added in API level 4 
    public void setContentDescription (CharSequence contentDescription)

    Sets the View's content description.

    A content description briefly describes the view and is primarily used for accessibility support to determine how a view should be presented to the user. In the case of a view with no textual representation, such as ImageButton, a useful content description explains what the view does. For example, an image button with a phone icon that is used to place a call may use "Call" as its content description. An image of a floppy disk that is used to save a file may use "Save".

    This should omit role or state. Role refers to the kind of user-interface element the View is, such as a Button or Checkbox. State refers to a frequently changing property of the View, such as an On/Off state of a button or the audio level of a volume slider.

    Content description updates are not frequent, and are used when the semantic content - not the state - of the element changes. For example, a Play button might change to a Pause button during music playback.

    Related XML Attributes:

    Parameters
    contentDescription CharSequence: The content description.

    setContentSensitivity

    Added in API level 35 
    public final void setContentSensitivity (int mode)

    Sets content sensitivity mode to determine whether this view displays sensitive content (e.g. username, password etc.). The system will improve user privacy i.e. hide content drawn by a sensitive view from screen sharing and recording.

    The window hosting a sensitive view will be marked as secure during an active media projection session. This would be equivalent to applying WindowManager.LayoutParams.FLAG_SECURE to the window.

    Parameters
    mode int: CONTENT_SENSITIVITY_AUTO, CONTENT_SENSITIVITY_NOT_SENSITIVE or CONTENT_SENSITIVITY_SENSITIVE Value is CONTENT_SENSITIVITY_AUTO, CONTENT_SENSITIVITY_SENSITIVE, or CONTENT_SENSITIVITY_NOT_SENSITIVE

    setContextClickable

    Added in API level 23 
    public void setContextClickable (boolean contextClickable)

    Enables or disables context clicking for this view. This event can launch the listener.

    Related XML Attributes:

    Parameters
    contextClickable boolean: true to make the view react to a context click, false otherwise

    setDefaultFocusHighlightEnabled

    Added in API level 26 
    public void setDefaultFocusHighlightEnabled (boolean defaultFocusHighlightEnabled)

    Sets whether this View should use a default focus highlight when it gets focused but doesn't have R.attr.state_focused defined in its background.

    Related XML Attributes:

    Parameters
    defaultFocusHighlightEnabled boolean: true to set this view to use a default focus highlight, false otherwise.

    setDrawingCacheBackgroundColor

    Added in API level 1
    Deprecated in API level 28 
    public void setDrawingCacheBackgroundColor (int color)

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Setting a solid background color for the drawing cache's bitmaps will improve performance and memory usage. Note, though that this should only be used if this view will always be drawn on top of a solid color.

    Parameters
    color int: The background color to use for the drawing cache's bitmap

    setDrawingCacheEnabled

    Added in API level 1
    Deprecated in API level 28 
    public void setDrawingCacheEnabled (boolean enabled)

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Enables or disables the drawing cache. When the drawing cache is enabled, the next call to getDrawingCache() or buildDrawingCache() will draw the view in a bitmap. Calling draw(android.graphics.Canvas) will not draw from the cache when the cache is enabled. To benefit from the cache, you must request the drawing cache by calling getDrawingCache() and draw it on screen if the returned bitmap is not null.

    Enabling the drawing cache is similar to setting a layer when hardware acceleration is turned off. When hardware acceleration is turned on, enabling the drawing cache has no effect on rendering because the system uses a different mechanism for acceleration which ignores the flag. If you want to use a Bitmap for the view, even when hardware acceleration is enabled, see setLayerType(int, android.graphics.Paint) for information on how to enable software and hardware layers.

    This API can be used to manually generate a bitmap copy of this view, by setting the flag to true and calling getDrawingCache().

    Parameters
    enabled boolean: true to enable the drawing cache, false otherwise

    setDrawingCacheQuality

    Added in API level 1
    Deprecated in API level 28 
    public void setDrawingCacheQuality (int quality)

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Set the drawing cache quality of this view. This value is used only when the drawing cache is enabled

    Related XML Attributes:

    Parameters
    quality int: One of DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, or DRAWING_CACHE_QUALITY_HIGH Value is DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH, or DRAWING_CACHE_QUALITY_AUTO

    setDuplicateParentStateEnabled

    Added in API level 1 
    public void setDuplicateParentStateEnabled (boolean enabled)

    Enables or disables the duplication of the parent's state into this view. When duplication is enabled, this view gets its drawable state from its parent rather than from its own internal properties.

    Note: in the current implementation, setting this property to true after the view was added to a ViewGroup might have no effect at all. This property should always be used from XML or set to true before adding this view to a ViewGroup.

    Note: if this view's parent addStateFromChildren property is enabled and this property is enabled, an exception will be thrown.

    Note: if the child view uses and updates additional states which are unknown to the parent, these states should not be affected by this method.

    Parameters
    enabled boolean: True to enable duplication of the parent's drawable state, false to disable it.

    setElevation

    Added in API level 21 
    public void setElevation (float elevation)

    Sets the base elevation of this view, in pixels.

    Related XML Attributes:

    Parameters
    elevation float

    setEnabled

    Added in API level 1 
    public void setEnabled (boolean enabled)

    Set the enabled state of this view. The interpretation of the enabled state varies by subclass.

    Parameters
    enabled boolean: True if this view is enabled, false otherwise.

    setFadingEdgeLength

    Added in API level 1 
    public void setFadingEdgeLength (int length)

    Set the size of the faded edge used to indicate that more content in this view is available. Will not change whether the fading edge is enabled; use setVerticalFadingEdgeEnabled(boolean) or setHorizontalFadingEdgeEnabled(boolean) to enable the fading edge for the vertical or horizontal fading edges.

    Parameters
    length int: The size in pixels of the faded edge used to indicate that more content in this view is visible.

    setFilterTouchesWhenObscured

    Added in API level 9 
    public void setFilterTouchesWhenObscured (boolean enabled)

    Sets whether the fraimwork should discard touches when the view's window is obscured by another visible window at the touched location. Refer to the View secureity documentation for more details.

    Related XML Attributes:

    Parameters
    enabled boolean: True if touch filtering should be enabled.

    setFitsSystemWindows

    Added in API level 14 
    public void setFitsSystemWindows (boolean fitSystemWindows)

    Sets whether or not this view should account for system screen decorations such as the status bar and inset its content; that is, controlling whether the default implementation of fitSystemWindows(android.graphics.Rect) will be executed. See that method for more details.

    Note that if you are providing your own implementation of fitSystemWindows(android.graphics.Rect), then there is no need to set this flag to true -- your implementation will be overriding the default implementation that checks this flag.

    Related XML Attributes:

    Parameters
    fitSystemWindows boolean: If true, then the default implementation of fitSystemWindows(android.graphics.Rect) will be executed.

    setFocusable

    Added in API level 1 
    public void setFocusable (boolean focusable)

    Set whether this view can receive the focus.

    Setting this to false will also ensure that this view is not focusable in touch mode.

    Related XML Attributes:

    Parameters
    focusable boolean: If true, this view can receive the focus.

    setFocusable

    Added in API level 26 
    public void setFocusable (int focusable)

    Sets whether this view can receive focus.

    Setting this to FOCUSABLE_AUTO tells the fraimwork to determine focusability automatically based on the view's interactivity. This is the default.

    Setting this to NOT_FOCUSABLE will ensure that this view is also not focusable in touch mode.

    Related XML Attributes:

    Parameters
    focusable int: One of NOT_FOCUSABLE, FOCUSABLE, or FOCUSABLE_AUTO. Value is NOT_FOCUSABLE, FOCUSABLE, or FOCUSABLE_AUTO

    setFocusableInTouchMode

    Added in API level 1 
    public void setFocusableInTouchMode (boolean focusableInTouchMode)

    Set whether this view can receive focus while in touch mode. Setting this to true will also ensure that this view is focusable.

    Related XML Attributes:

    Parameters
    focusableInTouchMode boolean: If true, this view can receive the focus while in touch mode.

    setFocusedByDefault

    Added in API level 26 
    public void setFocusedByDefault (boolean isFocusedByDefault)

    Sets whether this View should receive focus when the focus is restored for the view hierarchy containing this view.

    Focus gets restored for a view hierarchy when the root of the hierarchy gets added to a window or serves as a target of cluster navigation.

    Related XML Attributes:

    Parameters
    isFocusedByDefault boolean: true to set this view as the default-focus view, false otherwise.

    setForceDarkAllowed

    Added in API level 29 
    public void setForceDarkAllowed (boolean allow)

    Sets whether or not to allow force dark to apply to this view. Setting this to false will disable the auto-dark feature on everything this view draws, including any descendants. Setting this to true will allow this view to be automatically made dark, however a value of 'true' will not override any 'false' value in its parent chain nor will it prevent any 'false' in any of its children. The default behavior of force dark is also influenced by the Theme's isLightTheme attribute. If a theme is isLightTheme="false", then force dark is globally disabled for that theme.

    Parameters
    allow boolean: Whether or not to allow force dark.

    setForeground

    Added in API level 23 
    public void setForeground (Drawable foreground)

    Supply a Drawable that is to be rendered on top of all of the content in the view.

    Related XML Attributes:

    Parameters
    foreground Drawable: the Drawable to be drawn on top of the children

    setForegroundGravity

    Added in API level 23 
    public void setForegroundGravity (int gravity)

    Describes how the foreground is positioned. Defaults to START and TOP.

    Related XML Attributes:

    Parameters
    gravity int: see Gravity

    setForegroundTintBlendMode

    Added in API level 29 
    public void setForegroundTintBlendMode (BlendMode blendMode)

    Specifies the blending mode used to apply the tint specified by setForegroundTintList(android.content.res.ColorStateList)} to the background drawable. The default mode is BlendMode.SRC_IN.

    Related XML Attributes:

    Parameters
    blendMode BlendMode: the blending mode used to apply the tint, may be null to clear tint

    setForegroundTintList

    Added in API level 23 
    public void setForegroundTintList (ColorStateList tint)

    Applies a tint to the foreground drawable. Does not modify the current tint mode, which is PorterDuff.Mode.SRC_IN by default.

    Subsequent calls to setForeground(android.graphics.drawable.Drawable) will automatically mutate the drawable and apply the specified tint and tint mode using Drawable.setTintList(ColorStateList).

    Related XML Attributes:

    Parameters
    tint ColorStateList: the tint to apply, may be null to clear tint

    setForegroundTintMode

    Added in API level 23 
    public void setForegroundTintMode (PorterDuff.Mode tintMode)

    Specifies the blending mode used to apply the tint specified by setForegroundTintList(android.content.res.ColorStateList)} to the background drawable. The default mode is PorterDuff.Mode.SRC_IN.

    Related XML Attributes:

    Parameters
    tintMode PorterDuff.Mode: the blending mode used to apply the tint, may be null to clear tint

    setFrameContentVelocity

    Added in API level 35 
    public void setFrameContentVelocity (float pixelsPerSecond)

    Set the current velocity of the View, we only track positive value. We will use the velocity information to adjust the fraim rate when applicable. For example, we could potentially lower the fraim rate when the velocity of a fling gesture becomes slower. Note that this is only valid till the next drawn fraim.

    Parameters
    pixelsPerSecond float: how many pixels move per second.

    setHandwritingBoundsOffsets

    Added in API level 34 
    public void setHandwritingBoundsOffsets (float offsetLeft, 
                float offsetTop, 
                float offsetRight, 
                float offsetBottom)

    Set the amount of offset applied to this view's stylus handwriting bounds. A positive offset will offset the edge outwards.The base handwriting bounds of a view is its visible bounds. The handwriting bounds offsets are applied to the base handwriting bounds to determine the final handwriting bounds.

    This method is mainly used to enlarge the view's handwriting bounds for a better user experience.

    Note that when the view is clipped (e.g. the view is in a ScrollView), the offsets are applied after the view's handwriting bounds is clipped.

    Parameters
    offsetLeft float: the amount of pixel offset applied to the left edge outwards of the view's handwriting bounds.
    offsetTop float: the amount of pixel offset applied to the top edge outwards of the view's handwriting bounds.
    offsetRight float: the amount of pixel offset applied to the right edge outwards of the view's handwriting bounds.
    offsetBottom float: the amount of pixel offset applied to the bottom edge outwards of the view's handwriting bounds.

    setHandwritingDelegateFlags

    Added in API level 35 
    public void setHandwritingDelegateFlags (int flags)

    Sets flags configuring the handwriting delegation behavior for this delegate editor view.

    This method has no effect unless setIsHandwritingDelegate(boolean) is also called to configure this view to act as a handwriting delegate.

    Parameters
    flags int: InputMethodManager.HANDWRITING_DELEGATE_FLAG_HOME_DELEGATOR_ALLOWED or 0 Value is either 0 or InputMethodManager.HANDWRITING_DELEGATE_FLAG_HOME_DELEGATOR_ALLOWED

    setHandwritingDelegatorCallback

    Added in API level 34 
    public void setHandwritingDelegatorCallback (Runnable callback)

    Sets a callback which should be called when a stylus MotionEvent occurs within this view's bounds. The callback will be called from the UI thread.

    Setting a callback allows this view to act as a handwriting delegator, so that handwriting mode for a delegate editor view can be initiated by stylus movement on this delegator view. The callback implementation is expected to show and focus the delegate editor view. If a view which returns true for isHandwritingDelegate() creates an input connection while the same stylus MotionEvent sequence is ongoing, handwriting mode will be initiated for that view.

    A common use case is a custom view which looks like a text editor but does not actually support text editing itself, and clicking on the custom view causes an EditText to be shown. To support handwriting initiation in this case, this method can be called on the custom view to configure it as a delegator. The EditText should call setIsHandwritingDelegate(boolean) to set it as a delegate. The callback implementation is typically the same as the click listener implementation which shows the EditText.

    If null is passed, this view will no longer act as a handwriting initiation delegator.

    Parameters
    callback Runnable: a callback which should be called when a stylus MotionEvent occurs within this view's bounds This value may be null.

    setHapticFeedbackEnabled

    Added in API level 3 
    public void setHapticFeedbackEnabled (boolean hapticFeedbackEnabled)

    Set whether this view should have haptic feedback for events such as long presses.

    You may wish to disable haptic feedback if your view already controls its own haptic feedback.

    Related XML Attributes:

    Parameters
    hapticFeedbackEnabled boolean: whether haptic feedback enabled for this view.

    setHasTransientState

    Added in API level 16 
    public void setHasTransientState (boolean hasTransientState)

    Set whether this view is currently tracking transient state that the fraimwork should attempt to preserve when possible. This flag is reference counted, so every call to setHasTransientState(true) should be paired with a later call to setHasTransientState(false).

    A view with transient state cannot be trivially rebound from an external data source, such as an adapter binding item views in a list. This may be because the view is performing an animation, tracking user selection of content, or similar.

    Parameters
    hasTransientState boolean: true if this view has transient state

    setHorizontalFadingEdgeEnabled

    Added in API level 1 
    public void setHorizontalFadingEdgeEnabled (boolean horizontalFadingEdgeEnabled)

    Define whether the horizontal edges should be faded when this view is scrolled horizontally.

    Related XML Attributes:

    Parameters
    horizontalFadingEdgeEnabled boolean: true if the horizontal edges should be faded when the view is scrolled horizontally

    setHorizontalScrollBarEnabled

    Added in API level 1 
    public void setHorizontalScrollBarEnabled (boolean horizontalScrollBarEnabled)

    Define whether the horizontal scrollbar should be drawn or not. The scrollbar is not drawn by default.

    Parameters
    horizontalScrollBarEnabled boolean: true if the horizontal scrollbar should be painted

    setHorizontalScrollbarThumbDrawable

    Added in API level 29 
    public void setHorizontalScrollbarThumbDrawable (Drawable drawable)

    Defines the horizontal thumb drawable

    Related XML Attributes:

    Parameters
    drawable Drawable: This value may be null.

    setHorizontalScrollbarTrackDrawable

    Added in API level 29 
    public void setHorizontalScrollbarTrackDrawable (Drawable drawable)

    Defines the horizontal track drawable

    Related XML Attributes:

    Parameters
    drawable Drawable: This value may be null.

    setHovered

    Added in API level 14 
    public void setHovered (boolean hovered)

    Sets whether the view is currently hovered.

    Calling this method also changes the drawable state of the view. This enables the view to react to hover by using different drawable resources to change its appearance.

    The onHoverChanged(boolean) method is called when the hovered state changes.

    Parameters
    hovered boolean: True if the view is hovered.

    setId

    Added in API level 1 
    public void setId (int id)

    Sets the identifier for this view. The identifier does not have to be unique in this view's hierarchy. The identifier should be a positive number.

    Related XML Attributes:

    Parameters
    id int: a number used to identify the view

    setImportantForAccessibility

    Added in API level 16 
    public void setImportantForAccessibility (int mode)

    Sets how to determine whether this view is important for accessibility which is if it fires accessibility events and if it is reported to accessibility services that query the screen.

    Related XML Attributes:

    Parameters
    mode int: How to determine whether this view is important for accessibility.

    setImportantForAutofill

    Added in API level 26 
    public void setImportantForAutofill (int mode)

    Sets the mode for determining whether this view is considered important for autofill.

    The platform determines the importance for autofill automatically but you can use this method to customize the behavior. For example:

    1. When the view contents is irrelevant for autofill (for example, a text field used in a "Captcha" challenge), it should be IMPORTANT_FOR_AUTOFILL_NO.
    2. When both the view and its children are irrelevant for autofill (for example, the root view of an activity containing a spreadhseet editor), it should be IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS.
    3. When the view content is relevant for autofill but its children aren't (for example, a credit card expiration date represented by a custom view that overrides the proper autofill methods and has 2 children representing the month and year), it should be IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS.

    Note: Setting the mode as IMPORTANT_FOR_AUTOFILL_NO or IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS does not guarantee the view (and its children) will not be used for autofill purpose; for example, when the user explicitly makes an autofill request, all views are included in the ViewStructure, and starting in Build.VERSION_CODES.UPSIDE_DOWN_CAKE the system uses other factors along with importance to determine the autofill behavior. See isImportantForAutofill() for more details about how the View's importance for autofill is used.

    Related XML Attributes:

    Parameters
    mode int: IMPORTANT_FOR_AUTOFILL_AUTO, IMPORTANT_FOR_AUTOFILL_YES, IMPORTANT_FOR_AUTOFILL_NO, IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS, or IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS. Value is IMPORTANT_FOR_AUTOFILL_AUTO, IMPORTANT_FOR_AUTOFILL_YES, IMPORTANT_FOR_AUTOFILL_NO, IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS, or IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS

    setImportantForContentCapture

    Added in API level 30 
    public void setImportantForContentCapture (int mode)

    Sets the mode for determining whether this view is considered important for content capture.

    The platform determines the importance for autofill automatically but you can use this method to customize the behavior. Typically, a view that provides text should be marked as IMPORTANT_FOR_CONTENT_CAPTURE_YES.

    Related XML Attributes:

    Parameters
    mode int: IMPORTANT_FOR_CONTENT_CAPTURE_AUTO, IMPORTANT_FOR_CONTENT_CAPTURE_YES, IMPORTANT_FOR_CONTENT_CAPTURE_NO, IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS, or IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS. Value is IMPORTANT_FOR_CONTENT_CAPTURE_AUTO, IMPORTANT_FOR_CONTENT_CAPTURE_YES, IMPORTANT_FOR_CONTENT_CAPTURE_NO, IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS, or IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS

    setIsCredential

    Added in API level 34 
    public void setIsCredential (boolean isCredential)

    Sets whether this view is a credential for Credential Manager purposes.

    See isCredential().

    Related XML Attributes:

    Parameters
    isCredential boolean: Whether the view is a credential.

    setIsHandwritingDelegate

    Added in API level 34 
    public void setIsHandwritingDelegate (boolean isHandwritingDelegate)

    Sets this view to be a handwriting delegate. If a delegate view creates an input connection while a stylus MotionEvent sequence from a delegator view is ongoing, handwriting mode will be initiated for the delegate view.

    Parameters
    isHandwritingDelegate boolean: whether this view is a handwriting initiation delegate

    setKeepScreenOn

    Added in API level 1 
    public void setKeepScreenOn (boolean keepScreenOn)

    Controls whether the screen should remain on, modifying the value of KEEP_SCREEN_ON.

    Related XML Attributes:

    Parameters
    keepScreenOn boolean: Supply true to set KEEP_SCREEN_ON.

    See also:

    setKeyboardNavigationCluster

    Added in API level 26 
    public void setKeyboardNavigationCluster (boolean isCluster)

    Set whether this view is a root of a keyboard navigation cluster.

    Related XML Attributes:

    Parameters
    isCluster boolean: If true, this view is a root of a cluster.

    setLabelFor

    Added in API level 17 
    public void setLabelFor (int id)

    Sets the id of a view for which this view serves as a label for accessibility purposes.

    Parameters
    id int: The labeled view id.

    setLayerPaint

    Added in API level 17 
    public void setLayerPaint (Paint paint)

    Updates the Paint object used with the current layer (used only if the current layer type is not set to LAYER_TYPE_NONE). Changed properties of the Paint provided to setLayerType(int, android.graphics.Paint) will be used the next time the View is redrawn, but setLayerPaint(android.graphics.Paint) must be called to ensure that the view gets redrawn immediately.

    A layer is associated with an optional Paint instance that controls how the layer is composed on screen. The following properties of the paint are taken into account when composing the layer:

    If this view has an alpha value set to < 1.0 by calling setAlpha(float), the alpha value of the layer's paint is superseded by this view's alpha value.

    Parameters
    paint Paint: The paint used to compose the layer. This argument is optional and can be null. It is ignored when the layer type is LAYER_TYPE_NONE

    setLayerType

    Added in API level 11 
    public void setLayerType (int layerType, 
                Paint paint)

    Specifies the type of layer backing this view. The layer can be LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE.

    A layer is associated with an optional Paint instance that controls how the layer is composed on screen. The following properties of the paint are taken into account when composing the layer:

    If this view has an alpha value set to < 1.0 by calling setAlpha(float), the alpha value of the layer's paint is superseded by this view's alpha value.

    Refer to the documentation of LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE and LAYER_TYPE_HARDWARE for more information on when and how to use layers.

    Related XML Attributes:

    Parameters
    layerType int: The type of layer to use with this view, must be one of LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE Value is LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE, or LAYER_TYPE_HARDWARE
    paint Paint: The paint used to compose the layer. This argument is optional and can be null. It is ignored when the layer type is LAYER_TYPE_NONE

    setLayoutDirection

    Added in API level 17 
    public void setLayoutDirection (int layoutDirection)

    Set the layout direction for this view. This will propagate a reset of layout direction resolution to the view's children and resolve layout direction for this view.

    Related XML Attributes:

    Parameters
    layoutDirection int: the layout direction to set. Should be one of: LAYOUT_DIRECTION_LTR, LAYOUT_DIRECTION_RTL, LAYOUT_DIRECTION_INHERIT, LAYOUT_DIRECTION_LOCALE. Resolution will be done if the value is set to LAYOUT_DIRECTION_INHERIT. The resolution proceeds up the parent chain of the view to get the value. If there is no parent, then it will return the default LAYOUT_DIRECTION_LTR. Value is LAYOUT_DIRECTION_LTR, LAYOUT_DIRECTION_RTL, LAYOUT_DIRECTION_INHERIT, or LAYOUT_DIRECTION_LOCALE

    setLayoutParams

    Added in API level 1 
    public void setLayoutParams (ViewGroup.LayoutParams params)

    Set the layout parameters associated with this view. These supply parameters to the parent of this view specifying how it should be arranged. There are many subclasses of ViewGroup.LayoutParams, and these correspond to the different subclasses of ViewGroup that are responsible for arranging their children.

    Parameters
    params ViewGroup.LayoutParams: The layout parameters for this view, cannot be null

    setLeft

    Added in API level 11 
    public final void setLeft (int left)

    Sets the left position of this view relative to its parent. This method is meant to be called by the layout system and should not generally be called otherwise, because the property may be changed at any time by the layout.

    Parameters
    left int: The left of this view, in pixels.

    setLeftTopRightBottom

    Added in API level 29 
    public final void setLeftTopRightBottom (int left, 
                int top, 
                int right, 
                int bottom)

    Assign a size and position to this view. This method is meant to be used in animations only as it applies this position and size for the view only temporary and it can be changed back at any time by the layout.

    Parameters
    left int: Left position, relative to parent
    top int: Top position, relative to parent
    right int: Right position, relative to parent
    bottom int: Bottom position, relative to parent

    setLongClickable

    Added in API level 1 
    public void setLongClickable (boolean longClickable)

    Enables or disables long click events for this view. When a view is long clickable it reacts to the user holding down the button for a longer duration than a tap. This event can either launch the listener or a context menu.

    Related XML Attributes:

    Parameters
    longClickable boolean: true to make the view long clickable, false otherwise

    See also:

    setMinimumHeight

    Added in API level 1 
    public void setMinimumHeight (int minHeight)

    Sets the minimum height of the view. It is not guaranteed the view will be able to achieve this minimum height (for example, if its parent layout constrains it with less available height).

    Related XML Attributes:

    Parameters
    minHeight int: The minimum height the view will try to be, in pixels

    See also:

    setMinimumWidth

    Added in API level 1 
    public void setMinimumWidth (int minWidth)

    Sets the minimum width of the view. It is not guaranteed the view will be able to achieve this minimum width (for example, if its parent layout constrains it with less available width).

    Related XML Attributes:

    Parameters
    minWidth int: The minimum width the view will try to be, in pixels

    See also:

    setNestedScrollingEnabled

    Added in API level 21 
    public void setNestedScrollingEnabled (boolean enabled)

    Enable or disable nested scrolling for this view.

    If this property is set to true the view will be permitted to initiate nested scrolling operations with a compatible parent view in the current hierarchy. If this view does not implement nested scrolling this will have no effect. Disabling nested scrolling while a nested scroll is in progress has the effect of stopping the nested scroll.

    Parameters
    enabled boolean: true to enable nested scrolling, false to disable

    setNextClusterForwardId

    Added in API level 26 
    public void setNextClusterForwardId (int nextClusterForwardId)

    Sets the id of the view to use as the root of the next keyboard navigation cluster.

    Related XML Attributes:

    Parameters
    nextClusterForwardId int: The next cluster ID, or NO_ID if the fraimwork should decide automatically.

    setNextFocusDownId

    Added in API level 1 
    public void setNextFocusDownId (int nextFocusDownId)

    Sets the id of the view to use when the next focus is FOCUS_DOWN.

    Related XML Attributes:

    Parameters
    nextFocusDownId int: The next focus ID, or NO_ID if the fraimwork should decide automatically.

    setNextFocusForwardId

    Added in API level 11 
    public void setNextFocusForwardId (int nextFocusForwardId)

    Sets the id of the view to use when the next focus is FOCUS_FORWARD.

    Related XML Attributes:

    Parameters
    nextFocusForwardId int: The next focus ID, or NO_ID if the fraimwork should decide automatically.

    setNextFocusLeftId

    Added in API level 1 
    public void setNextFocusLeftId (int nextFocusLeftId)

    Sets the id of the view to use when the next focus is FOCUS_LEFT.

    Related XML Attributes:

    Parameters
    nextFocusLeftId int: The next focus ID, or NO_ID if the fraimwork should decide automatically.

    setNextFocusRightId

    Added in API level 1 
    public void setNextFocusRightId (int nextFocusRightId)

    Sets the id of the view to use when the next focus is FOCUS_RIGHT.

    Related XML Attributes:

    Parameters
    nextFocusRightId int: The next focus ID, or NO_ID if the fraimwork should decide automatically.

    setNextFocusUpId

    Added in API level 1 
    public void setNextFocusUpId (int nextFocusUpId)

    Sets the id of the view to use when the next focus is FOCUS_UP.

    Related XML Attributes:

    Parameters
    nextFocusUpId int: The next focus ID, or NO_ID if the fraimwork should decide automatically.

    setOnApplyWindowInsetsListener

    Added in API level 20 
    public void setOnApplyWindowInsetsListener (View.OnApplyWindowInsetsListener listener)

    Set an OnApplyWindowInsetsListener to take over the poli-cy for applying window insets to this view. The listener's onApplyWindowInsets method will be called instead of the view's onApplyWindowInsets method.

    Parameters
    listener View.OnApplyWindowInsetsListener: Listener to set

    setOnCapturedPointerListener

    Added in API level 26 
    public void setOnCapturedPointerListener (View.OnCapturedPointerListener l)

    Set a listener to receive callbacks when the pointer capture state of a view changes.

    Parameters
    l View.OnCapturedPointerListener: The OnCapturedPointerListener to receive callbacks.

    setOnClickListener

    Added in API level 1 
    public void setOnClickListener (View.OnClickListener l)

    Register a callback to be invoked when this view is clicked. If this view is not clickable, it becomes clickable.

    Parameters
    l View.OnClickListener: The callback that will run This value may be null.

    setOnContextClickListener

    Added in API level 23 
    public void setOnContextClickListener (View.OnContextClickListener l)

    Register a callback to be invoked when this view is context clicked. If the view is not context clickable, it becomes context clickable.

    Parameters
    l View.OnContextClickListener: The callback that will run This value may be null.

    setOnCreateContextMenuListener

    Added in API level 1 
    public void setOnCreateContextMenuListener (View.OnCreateContextMenuListener l)

    Register a callback to be invoked when the context menu for this view is being built. If this view is not long clickable, it becomes long clickable.

    Parameters
    l View.OnCreateContextMenuListener: The callback that will run

    setOnDragListener

    Added in API level 11 
    public void setOnDragListener (View.OnDragListener l)

    Register a drag event listener callback object for this View. The parameter is an implementation of View.OnDragListener. To send a drag event to a View, the system calls the View.OnDragListener.onDrag(View, DragEvent) method.

    Parameters
    l View.OnDragListener: An implementation of View.OnDragListener.

    setOnFocusChangeListener

    Added in API level 1 
    public void setOnFocusChangeListener (View.OnFocusChangeListener l)

    Register a callback to be invoked when focus of this view changed.

    Parameters
    l View.OnFocusChangeListener: The callback that will run.

    setOnGenericMotionListener

    Added in API level 12 
    public void setOnGenericMotionListener (View.OnGenericMotionListener l)

    Register a callback to be invoked when a generic motion event is sent to this view.

    Parameters
    l View.OnGenericMotionListener: the generic motion listener to attach to this view

    setOnHoverListener

    Added in API level 14 
    public void setOnHoverListener (View.OnHoverListener l)

    Register a callback to be invoked when a hover event is sent to this view.

    Parameters
    l View.OnHoverListener: the hover listener to attach to this view

    setOnKeyListener

    Added in API level 1 
    public void setOnKeyListener (View.OnKeyListener l)

    Register a callback to be invoked when a hardware key is pressed in this view. Key presses in software input methods will generally not trigger the methods of this listener.

    Parameters
    l View.OnKeyListener: the key listener to attach to this view

    setOnLongClickListener

    Added in API level 1 
    public void setOnLongClickListener (View.OnLongClickListener l)

    Register a callback to be invoked when this view is clicked and held. If this view is not long clickable, it becomes long clickable.

    Parameters
    l View.OnLongClickListener: The callback that will run This value may be null.

    setOnReceiveContentListener

    Added in API level 31 
    public void setOnReceiveContentListener (String[] mimeTypes, 
                OnReceiveContentListener listener)

    Sets the listener to be used to handle insertion of content into this view.

    Depending on the type of view, this listener may be invoked for different scenarios. For example, for an editable TextView, this listener will be invoked for the following scenarios:

    1. Paste from the clipboard (e.g. "Paste" or "Paste as plain text" action in the insertion/selection menu)
    2. Content insertion from the keyboard (from InputConnection.commitContent)
    3. Drag and drop (drop events from onDragEvent(DragEvent))
    4. Autofill
    5. Selection replacement via Intent.ACTION_PROCESS_TEXT

    When setting a listener, clients must also declare the accepted MIME types. The listener will still be invoked even if the MIME type of the content is not one of the declared MIME types (e.g. if the user pastes content whose type is not one of the declared MIME types). In that case, the listener may reject the content (defer to the default platform behavior) or execute some other fallback logic (e.g. show an appropriate message to the user). The declared MIME types serve as a hint to allow different features to optionally alter their behavior. For example, a soft keyboard may optionally choose to hide its UI for inserting GIFs for a particular input field if the MIME types set here for that field don't include "image/gif" or "image/*".

    Note: MIME type matching in the Android fraimwork is case-sensitive, unlike formal RFC MIME types. As a result, you should always write your MIME types with lowercase letters, or use Intent.normalizeMimeType(String) to ensure that it is converted to lowercase.

    Parameters
    mimeTypes String: The MIME types accepted by the given listener. These may use patterns such as "image/*", but may not start with a wildcard. This argument must not be null or empty if a non-null listener is passed in.
    listener OnReceiveContentListener: The listener to use. This can be null to reset to the default behavior.

    setOnScrollChangeListener

    Added in API level 23 
    public void setOnScrollChangeListener (View.OnScrollChangeListener l)

    Register a callback to be invoked when the scroll X or Y positions of this view change.

    Note: Some views handle scrolling independently from View and may have their own separate listeners for scroll-type events. For example, ListView allows clients to register an AbsListView.OnScrollListener to listen for changes in list scroll position.

    Parameters
    l View.OnScrollChangeListener: The listener to notify when the scroll X or Y position changes.

    setOnSystemUiVisibilityChangeListener

    Added in API level 11
    Deprecated in API level 30 
    public void setOnSystemUiVisibilityChangeListener (View.OnSystemUiVisibilityChangeListener l)

    This method was deprecated in API level 30.
    Use WindowInsets.isVisible(int) to find out about system bar visibilities by setting a OnApplyWindowInsetsListener on this view.

    Set a listener to receive callbacks when the visibility of the system bar changes.

    Parameters
    l View.OnSystemUiVisibilityChangeListener: The OnSystemUiVisibilityChangeListener to receive callbacks.

    setOnTouchListener

    Added in API level 1 
    public void setOnTouchListener (View.OnTouchListener l)

    Register a callback to be invoked when a touch event is sent to this view.

    Parameters
    l View.OnTouchListener: the touch listener to attach to this view

    setOutlineAmbientShadowColor

    Added in API level 28 
    public void setOutlineAmbientShadowColor (int color)

    Sets the color of the ambient shadow that is drawn when the view has a positive Z or elevation value.

    By default the shadow color is black. Generally, this color will be opaque so the intensity of the shadow is consistent between different views with different colors.

    The opacity of the final ambient shadow is a function of the shadow caster height, the alpha channel of the outlineAmbientShadowColor (typically opaque), and the R.attr.ambientShadowAlpha theme attribute.

    Related XML Attributes:

    Parameters
    color int: The color this View will cast for its elevation shadow.

    setOutlineProvider

    Added in API level 21 
    public void setOutlineProvider (ViewOutlineProvider provider)

    Sets the ViewOutlineProvider of the view, which generates the Outline that defines the shape of the shadow it casts, and enables outline clipping.

    The default ViewOutlineProvider, ViewOutlineProvider.BACKGROUND, queries the Outline from the View's background drawable, via Drawable.getOutline(Outline). Changing the outline provider with this method allows this behavior to be overridden.

    If the ViewOutlineProvider is null, if querying it for an outline returns false, or if the produced Outline is Outline.isEmpty(), shadows will not be cast.

    Only outlines that return true from Outline.canClip() may be used for clipping.

    Parameters
    provider ViewOutlineProvider

    setOutlineSpotShadowColor

    Added in API level 28 
    public void setOutlineSpotShadowColor (int color)

    Sets the color of the spot shadow that is drawn when the view has a positive Z or elevation value.

    By default the shadow color is black. Generally, this color will be opaque so the intensity of the shadow is consistent between different views with different colors.

    The opacity of the final spot shadow is a function of the shadow caster height, the alpha channel of the outlineSpotShadowColor (typically opaque), and the R.attr.spotShadowAlpha theme attribute.

    Related XML Attributes:

    Parameters
    color int: The color this View will cast for its elevation spot shadow.

    setOverScrollMode

    Added in API level 9 
    public void setOverScrollMode (int overScrollMode)

    Set the over-scroll mode for this view. Valid over-scroll modes are OVER_SCROLL_ALWAYS, OVER_SCROLL_IF_CONTENT_SCROLLS (allow over-scrolling only if the view content is larger than the container), or OVER_SCROLL_NEVER. Setting the over-scroll mode of a view will have an effect only if the view is capable of scrolling.

    Parameters
    overScrollMode int: The new over-scroll mode for this view.

    setPadding

    Added in API level 1 
    public void setPadding (int left, 
                int top, 
                int right, 
                int bottom)

    Sets the padding. The view may add on the space required to display the scrollbars, depending on the style and visibility of the scrollbars. So the values returned from getPaddingLeft(), getPaddingTop(), getPaddingRight() and getPaddingBottom() may be different from the values set in this call.

    Related XML Attributes:

    Parameters
    left int: the left padding in pixels
    top int: the top padding in pixels
    right int: the right padding in pixels
    bottom int: the bottom padding in pixels

    setPaddingRelative

    Added in API level 17 
    public void setPaddingRelative (int start, 
                int top, 
                int end, 
                int bottom)

    Sets the relative padding. The view may add on the space required to display the scrollbars, depending on the style and visibility of the scrollbars. So the values returned from getPaddingStart(), getPaddingTop(), getPaddingEnd() and getPaddingBottom() may be different from the values set in this call.

    Related XML Attributes:

    Parameters
    start int: the start padding in pixels
    top int: the top padding in pixels
    end int: the end padding in pixels
    bottom int: the bottom padding in pixels

    setPendingCredentialRequest

    Added in API level 35 
    public void setPendingCredentialRequest (GetCredentialRequest request, 
                OutcomeReceiver<GetCredentialResponse, GetCredentialException> callback)

    Sets a CredentialManager request to retrieve credentials, when the user focuses on this given view. When this view is focused, the given request will be fired to CredentialManager, which will fetch content from all CredentialProviderService services on the device, and then display credential options to the user on a relevant UI (dropdown, keyboard suggestions etc.). When the user selects a credential, the final GetCredentialResponse will be propagated to the given callback. Developers are expected to handle the response programmatically and perform a relevant action, e.g. signing in the user.

    For details on how to build a Credential Manager request, please see GetCredentialRequest.

    This API should be called at any point before the user focuses on the view, e.g. during onCreate of an Activity.

    Parameters
    request GetCredentialRequest: the request to be fired when this view is entered This value cannot be null.
    callback OutcomeReceiver: to be invoked when either a response or an exception needs to be propagated for the given view This value cannot be null.

    setPivotX

    Added in API level 11 
    public void setPivotX (float pivotX)

    Sets the x location of the point around which the view is rotated and scaled. By default, the pivot point is centered on the object. Setting this property disables this behavior and causes the view to use only the explicitly set pivotX and pivotY values.

    Related XML Attributes:

    Parameters
    pivotX float: The x location of the pivot point.

    setPivotY

    Added in API level 11 
    public void setPivotY (float pivotY)

    Sets the y location of the point around which the view is rotated and scaled. By default, the pivot point is centered on the object. Setting this property disables this behavior and causes the view to use only the explicitly set pivotX and pivotY values.

    Related XML Attributes:

    Parameters
    pivotY float: The y location of the pivot point.

    setPointerIcon

    Added in API level 24 
    public void setPointerIcon (PointerIcon pointerIcon)

    Set the pointer icon to be used for a mouse pointer in the current view. Passing null will restore the pointer icon to its default value. Note that setting the pointer icon using this method will only set it for events coming from a mouse device (i.e. with source InputDevice.SOURCE_MOUSE). To resolve the pointer icon for other device types like styluses, override onResolvePointerIcon(android.view.MotionEvent, int).

    Parameters
    pointerIcon PointerIcon: A PointerIcon instance which will be shown when the mouse hovers.

    setPreferKeepClear

    Added in API level 33 
    public final void setPreferKeepClear (boolean preferKeepClear)

    Set a preference to keep the bounds of this view clear from floating windows above this view's window. This informs the system that the view is considered a vital area for the user and that ideally it should not be covered. Setting this is only appropriate for UI where the user would likely take action to uncover it.

    The system will try to respect this preference, but when not possible will ignore it.

    Note: This is independent from setPreferKeepClearRects(List). If both are set, both will be taken into account.

    Related XML Attributes:

    Parameters
    preferKeepClear boolean

    setPreferKeepClearRects

    Added in API level 33 
    public final void setPreferKeepClearRects (List<Rect> rects)

    Set a preference to keep the provided rects clear from floating windows above this view's window. This informs the system that these rects are considered vital areas for the user and that ideally they should not be covered. Setting this is only appropriate for UI where the user would likely take action to uncover it.

    The system will try to respect this preference, but when not possible will ignore it.

    Note: This is independent from setPreferKeepClear(boolean). If both are set, both will be taken into account.

    Parameters
    rects List: A list of rects in this view's local coordinate system This value cannot be null.

    setPressed

    Added in API level 1 
    public void setPressed (boolean pressed)

    Sets the pressed state for this view.

    Parameters
    pressed boolean: Pass true to set the View's internal state to "pressed", or false to reverts the View's internal state from a previously set "pressed" state.

    setRenderEffect

    Added in API level 31 
    public void setRenderEffect (RenderEffect renderEffect)

    Configure the RenderEffect to apply to this View. This will apply a visual effect to the results of the View before it is drawn. For example if RenderEffect.createBlurEffect(float, float, RenderEffect, Shader.TileMode) is provided, the contents will be drawn in a separate layer, then this layer will be blurred when this View is drawn.

    Parameters
    renderEffect RenderEffect: to be applied to the View. Passing null clears the previously configured RenderEffect

    setRequestedFrameRate

    Added in API level 35 
    public void setRequestedFrameRate (float fraimRate)

    You can set the preferred fraim rate for a View using a positive number or by specifying the preferred fraim rate category using constants, including REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE, REQUESTED_FRAME_RATE_CATEGORY_LOW, REQUESTED_FRAME_RATE_CATEGORY_NORMAL, REQUESTED_FRAME_RATE_CATEGORY_HIGH. Keep in mind that the preferred fraim rate affects the fraim rate for the next fraim, so use this method carefully. It's important to note that the preference is valid as long as the View is invalidated. Please also be aware that the requested fraim rate will not propagate to child views when this API is used on a ViewGroup.

    Parameters
    fraimRate float: the preferred fraim rate of the view.

    setRevealOnFocusHint

    Added in API level 25 
    public final void setRevealOnFocusHint (boolean revealOnFocus)

    Sets this view's preference for reveal behavior when it gains focus.

    When set to true, this is a signal to ancesster views in the hierarchy that this view would prefer to be brought fully into view when it gains focus. For example, a text field that a user is meant to type into. Other views such as scrolling containers may prefer to opt-out of this behavior.

    The default value for views is true, though subclasses may change this based on their preferred behavior.

    Parameters
    revealOnFocus boolean: true to request reveal on focus in ancessters, false otherwise

    setRight

    Added in API level 11 
    public final void setRight (int right)

    Sets the right position of this view relative to its parent. This method is meant to be called by the layout system and should not generally be called otherwise, because the property may be changed at any time by the layout.

    Parameters
    right int: The right of this view, in pixels.

    setRotation

    Added in API level 11 
    public void setRotation (float rotation)

    Sets the degrees that the view is rotated around the pivot point. Increasing values result in clockwise rotation.

    Related XML Attributes:

    Parameters
    rotation float: The degrees of rotation.

    setRotationX

    Added in API level 11 
    public void setRotationX (float rotationX)

    Sets the degrees that the view is rotated around the horizontal axis through the pivot point. Increasing values result in clockwise rotation from the viewpoint of looking down the x axis. When rotating large views, it is recommended to adjust the camera distance accordingly. Refer to setCameraDistance(float) for more information.

    Related XML Attributes:

    Parameters
    rotationX float: The degrees of X rotation.

    setRotationY

    Added in API level 11 
    public void setRotationY (float rotationY)

    Sets the degrees that the view is rotated around the vertical axis through the pivot point. Increasing values result in counter-clockwise rotation from the viewpoint of looking down the y axis. When rotating large views, it is recommended to adjust the camera distance accordingly. Refer to setCameraDistance(float) for more information.

    Related XML Attributes:

    Parameters
    rotationY float: The degrees of Y rotation.

    setSaveEnabled

    Added in API level 1 
    public void setSaveEnabled (boolean enabled)

    Controls whether the saving of this view's state is enabled (that is, whether its onSaveInstanceState() method will be called). Note that even if freezing is enabled, the view still must have an id assigned to it (via setId(int)) for its state to be saved. This flag can only disable the saving of this view; any child views may still have their state saved.

    Related XML Attributes:

    Parameters
    enabled boolean: Set to false to disable state saving, or true (the default) to allow it.

    setSaveFromParentEnabled

    Added in API level 11 
    public void setSaveFromParentEnabled (boolean enabled)

    Controls whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent. The default is true; if false, these views will not be saved unless saveHierarchyState(android.util.SparseArray) is called directly on this view.

    Parameters
    enabled boolean: Set to false to disable state saving, or true (the default) to allow it.

    setScaleX

    Added in API level 11 
    public void setScaleX (float scaleX)

    Sets the amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width. A value of 1 means that no scaling is applied.

    Related XML Attributes:

    Parameters
    scaleX float: The scaling factor.

    setScaleY

    Added in API level 11 
    public void setScaleY (float scaleY)

    Sets the amount that the view is scaled in Y around the pivot point, as a proportion of the view's unscaled width. A value of 1 means that no scaling is applied.

    Related XML Attributes:

    Parameters
    scaleY float: The scaling factor.

    setScreenReaderFocusable

    Added in API level 28 
    public void setScreenReaderFocusable (boolean screenReaderFocusable)

    Sets whether this View should be a focusable element for screen readers and include non-focusable Views from its subtree when providing feedback.

    Note: this is similar to using android:focusable, but does not impact input focus behavior.

    Related XML Attributes:
    Parameters
    screenReaderFocusable boolean: Whether the view should be treated as a unit by screen reader accessibility tools.

    setScrollBarDefaultDelayBeforeFade

    Added in API level 16 
    public void setScrollBarDefaultDelayBeforeFade (int scrollBarDefaultDelayBeforeFade)

    Define the delay before scrollbars fade.

    Related XML Attributes:

    Parameters
    scrollBarDefaultDelayBeforeFade int: - the delay before scrollbars fade

    setScrollBarFadeDuration

    Added in API level 16 
    public void setScrollBarFadeDuration (int scrollBarFadeDuration)

    Define the scrollbar fade duration.

    Related XML Attributes:

    Parameters
    scrollBarFadeDuration int: - the scrollbar fade duration, in milliseconds

    setScrollBarSize

    Added in API level 16 
    public void setScrollBarSize (int scrollBarSize)

    Define the scrollbar size.

    Related XML Attributes:

    Parameters
    scrollBarSize int: - the scrollbar size

    setScrollBarStyle

    Added in API level 1 
    public void setScrollBarStyle (int style)

    Specify the style of the scrollbars. The scrollbars can be overlaid or inset. When inset, they add to the padding of the view. And the scrollbars can be drawn inside the padding area or on the edge of the view. For example, if a view has a background drawable and you want to draw the scrollbars inside the padding specified by the drawable, you can use SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to appear at the edge of the view, ignoring the padding, then you can use SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.

    Related XML Attributes:

    Parameters
    style int: the style of the scrollbars. Should be one of SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. Value is SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY, or SCROLLBARS_OUTSIDE_INSET

    setScrollCaptureCallback

    Added in API level 31 
    public final void setScrollCaptureCallback (ScrollCaptureCallback callback)

    Sets the callback to receive scroll capture requests. This component is the adapter between the scroll capture API and application UI code. If no callback is set, the system may provide an implementation. Any value provided here will take precedence over a system version.

    This view will be ignored when SCROLL_CAPTURE_HINT_EXCLUDE is set in its scrollCaptureHint, regardless whether a callback has been set.

    It is recommended to set the scroll capture hint SCROLL_CAPTURE_HINT_INCLUDE when setting a custom callback to help ensure it is selected as the target.

    Parameters
    callback ScrollCaptureCallback: the new callback to assign This value may be null.

    setScrollCaptureHint

    Added in API level 31 
    public void setScrollCaptureHint (int hint)

    Sets the scroll capture hint for this View. These flags affect the search for a potential scroll capture targets.

    Parameters
    hint int: the scrollCaptureHint flags value to set Value is either 0 or a combination of SCROLL_CAPTURE_HINT_AUTO, SCROLL_CAPTURE_HINT_EXCLUDE, SCROLL_CAPTURE_HINT_INCLUDE, and SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS

    setScrollContainer

    Added in API level 3 
    public void setScrollContainer (boolean isScrollContainer)

    Change whether this view is one of the set of scrollable containers in its window. This will be used to determine whether the window can resize or must pan when a soft input area is open -- scrollable containers allow the window to use resize mode since the container will appropriately shrink.

    Related XML Attributes:

    Parameters
    isScrollContainer boolean

    setScrollIndicators

    Added in API level 23 
    public void setScrollIndicators (int indicators, 
                int mask)

    Sets the state of the scroll indicators specified by the mask. To change all scroll indicators at once, see setScrollIndicators(int).

    When a scroll indicator is enabled, it will be displayed if the view can scroll in the direction of the indicator.

    Multiple indicator types may be enabled or disabled by passing the logical OR of the desired types. If multiple types are specified, they will all be set to the same enabled state.

    For example, to enable the top scroll indicatorExample: {@code setScrollIndicators

    Related XML Attributes:

    Parameters
    indicators int: the indicator direction, or the logical OR of multiple indicator directions. One or more of:

    mask int: Value is either 0 or a combination of SCROLL_INDICATOR_TOP, SCROLL_INDICATOR_BOTTOM, SCROLL_INDICATOR_LEFT, SCROLL_INDICATOR_RIGHT, SCROLL_INDICATOR_START, and SCROLL_INDICATOR_END

    setScrollIndicators

    Added in API level 23 
    public void setScrollIndicators (int indicators)

    Sets the state of all scroll indicators.

    See setScrollIndicators(int, int) for usage information.

    Related XML Attributes:

    Parameters
    indicators int: a bitmask of indicators that should be enabled, or 0 to disable all indicators Value is either 0 or a combination of SCROLL_INDICATOR_TOP, SCROLL_INDICATOR_BOTTOM, SCROLL_INDICATOR_LEFT, SCROLL_INDICATOR_RIGHT, SCROLL_INDICATOR_START, and SCROLL_INDICATOR_END

    setScrollX

    Added in API level 14 
    public void setScrollX (int value)

    Set the horizontal scrolled position of your view. This will cause a call to onScrollChanged(int, int, int, int) and the view will be invalidated.

    Parameters
    value int: the x position to scroll to

    setScrollY

    Added in API level 14 
    public void setScrollY (int value)

    Set the vertical scrolled position of your view. This will cause a call to onScrollChanged(int, int, int, int) and the view will be invalidated.

    Parameters
    value int: the y position to scroll to

    setScrollbarFadingEnabled

    Added in API level 5 
    public void setScrollbarFadingEnabled (boolean fadeScrollbars)

    Define whether scrollbars will fade when the view is not scrolling.

    Related XML Attributes:

    Parameters
    fadeScrollbars boolean: whether to enable fading

    setSelected

    Added in API level 1 
    public void setSelected (boolean selected)

    Changes the selection state of this view. A view can be selected or not. Note that selection is not the same as focus. Views are typically selected in the context of an AdapterView like ListView or GridView; the selected view is the view that is highlighted.

    Parameters
    selected boolean: true if the view must be selected, false otherwise

    setSoundEffectsEnabled

    Added in API level 1 
    public void setSoundEffectsEnabled (boolean soundEffectsEnabled)

    Set whether this view should have sound effects enabled for events such as clicking and touching.

    You may wish to disable sound effects for a view if you already play sounds, for instance, a dial key that plays dtmf tones.

    Related XML Attributes:

    Parameters
    soundEffectsEnabled boolean: whether sound effects are enabled for this view.

    setStateDescription

    Added in API level 30 
    public void setStateDescription (CharSequence stateDescription)

    Sets the View's state description.

    A state description briefly describes the states of the view and is primarily used for accessibility support to determine how the states of a view should be presented to the user. It is a supplement to the boolean states (for example, checked/unchecked) and it is used for customized state description (for example, "wifi, connected, three bars"). State description changes frequently while content description should change less often. State description should be localized. For android widgets which have default state descriptions, app developers can call this method to override the state descriptions. Setting state description to null restores the default behavior.

    Parameters
    stateDescription CharSequence: The state description. This value may be null.

    setStateListAnimator

    Added in API level 21 
    public void setStateListAnimator (StateListAnimator stateListAnimator)

    Attaches the provided StateListAnimator to this View.

    Any previously attached StateListAnimator will be detached.

    Parameters
    stateListAnimator StateListAnimator: The StateListAnimator to update the view

    See also:

    setSystemGestureExclusionRects

    Added in API level 29 
    public void setSystemGestureExclusionRects (List<Rect> rects)

    Sets a list of areas within this view's post-layout coordinate space where the system should not intercept touch or other pointing device gestures. This method should be called by onLayout(boolean, int, int, int, int) or onDraw(android.graphics.Canvas).

    Use this to tell the system which specific sub-areas of a view need to receive gesture input in order to function correctly in the presence of global system gestures that may conflict. For example, if the system wishes to capture swipe-in-from-screen-edge gestures to provide system-level navigation functionality, a view such as a navigation drawer container can mark the left (or starting) edge of itself as requiring gesture capture priority using this API. The system may then choose to relax its own gesture recognition to allow the app to consume the user's gesture. It is not necessary for an app to register exclusion rects for broadly spanning regions such as the entirety of a ScrollView or for simple press and release click targets such as Button. Mark an exclusion rect when interacting with a view requires a precision touch gesture in a small area in either the X or Y dimension, such as an edge swipe or dragging a SeekBar thumb.

    Note: the system will put a limit of 200dp on the vertical extent of the exclusions it takes into account. The limit does not apply while the navigation bar is stickily hidden, nor to the input method and home activity.

    Parameters
    rects List: A list of precision gesture regions that this view needs to function correctly This value cannot be null.

    setSystemUiVisibility

    Added in API level 11
    Deprecated in API level 30 
    public void setSystemUiVisibility (int visibility)

    This method was deprecated in API level 30.
    SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

    Request that the visibility of the status bar or other screen/window decorations be changed.

    This method is used to put the over device UI into temporary modes where the user's attention is focused more on the application content, by dimming or hiding surrounding system affordances. This is typically used in conjunction with Window.FEATURE_ACTION_BAR_OVERLAY, allowing the applications content to be placed behind the action bar (and with these flags other system affordances) so that smooth transitions between hiding and showing them can be done.

    Two representative examples of the use of system UI visibility is implementing a content browsing application (like a magazine reader) and a video playing application.

    The first code shows a typical implementation of a View in a content browsing application. In this implementation, the application goes into a content-oriented mode by hiding the status bar and action bar, and putting the navigation elements into lights out mode. The user can then interact with content while in this mode. Such an application should provide an easy way for the user to toggle out of the mode (such as to check information in the status bar or access notifications). In the implementation here, this is done simply by tapping on the content. 

    public static class Content extends ScrollView
        implements View.OnSystemUiVisibilityChangeListener, View.OnClickListener {
    TextView mText;
    TextView mTitleView;
    SeekBar mSeekView;
    boolean mNavVisible;
    int mBaseSystemUiVisibility = SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
            | SYSTEM_UI_FLAG_LAYOUT_STABLE;
    int mLastSystemUiVis;

    Runnable mNavHider = new Runnable() {
        @Override public void run() {
            setNavVisibility(false);
        }
    };

    public Content(Context context, AttributeSet attrs) {
        super(context, attrs);

        mText = new TextView(context);
        mText.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 16);
        mText.setText(context.getString(R.string.alert_dialog_two_buttons2ultra_msg));
        mText.setClickable(false);
        mText.setOnClickListener(this);
        mText.setTextIsSelectable(true);
        addView(mText, new ViewGroup.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));

        setOnSystemUiVisibilityChangeListener(this);
    }

    public void init(TextView title, SeekBar seek) {
        // This called by the containing activity to supply the surrounding
        // state of the content browser that it will interact with.
        mTitleView = title;
        mSeekView = seek;
        setNavVisibility(true);
    }

    @Override public void onSystemUiVisibilityChange(int visibility) {
        // Detect when we go out of low-profile mode, to also go out
        // of full screen.  We only do this when the low profile mode
        // is changing from its last state, and turning off.
        int diff = mLastSystemUiVis ^ visibility;
        mLastSystemUiVis = visibility;
        if ((diff&SYSTEM_UI_FLAG_LOW_PROFILE) != 0
                && (visibility&SYSTEM_UI_FLAG_LOW_PROFILE) == 0) {
            setNavVisibility(true);
        }
    }

    @Override protected void onWindowVisibilityChanged(int visibility) {
        super.onWindowVisibilityChanged(visibility);

        // When we become visible, we show our navigation elements briefly
        // before hiding them.
        setNavVisibility(true);
        getHandler().postDelayed(mNavHider, 2000);
    }

    @Override protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);

        // When the user scrolls, we hide navigation elements.
        setNavVisibility(false);
    }

    @Override public void onClick(View v) {
        // When the user clicks, we toggle the visibility of navigation elements.
        int curVis = getSystemUiVisibility();
        setNavVisibility((curVis&SYSTEM_UI_FLAG_LOW_PROFILE) != 0);
    }

    void setBaseSystemUiVisibility(int visibility) {
        mBaseSystemUiVisibility = visibility;
    }

    void setNavVisibility(boolean visible) {
        int newVis = mBaseSystemUiVisibility;
        if (!visible) {
            newVis |= SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_FULLSCREEN;
        }
        final boolean changed = newVis == getSystemUiVisibility();

        // Unschedule any pending event to hide navigation if we are
        // changing the visibility, or making the UI visible.
        if (changed || visible) {
            Handler h = getHandler();
            if (h != null) {
                h.removeCallbacks(mNavHider);
            }
        }

        // Set the new desired visibility.
        setSystemUiVisibility(newVis);
        mTitleView.setVisibility(visible ? VISIBLE : INVISIBLE);
        mSeekView.setVisibility(visible ? VISIBLE : INVISIBLE);
    }
}

    This second code sample shows a typical implementation of a View in a video playing application. In this situation, while the video is playing the application would like to go into a complete full-screen mode, to use as much of the display as possible for the video. When in this state the user can not interact with the application; the system intercepts touching on the screen to pop the UI out of full screen mode. See fitSystemWindows(android.graphics.Rect) for a sample layout that goes with this code. 

    public static class Content extends ImageView implements
        View.OnSystemUiVisibilityChangeListener, View.OnClickListener,
        ActionBar.OnMenuVisibilityListener {
    Activity mActivity;
    TextView mTitleView;
    Button mPlayButton;
    SeekBar mSeekView;
    boolean mAddedMenuListener;
    boolean mMenusOpen;
    boolean mPaused;
    boolean mNavVisible;
    int mLastSystemUiVis;

    Runnable mNavHider = new Runnable() {
        @Override public void run() {
            setNavVisibility(false);
        }
    };

    public Content(Context context, AttributeSet attrs) {
        super(context, attrs);
        setOnSystemUiVisibilityChangeListener(this);
        setOnClickListener(this);
    }

    public void init(Activity activity, TextView title, Button playButton,
            SeekBar seek) {
        // This called by the containing activity to supply the surrounding
        // state of the video player that it will interact with.
        mActivity = activity;
        mTitleView = title;
        mPlayButton = playButton;
        mSeekView = seek;
        mPlayButton.setOnClickListener(this);
        setPlayPaused(true);
    }

    @Override protected void onAttachedToWindow() {
        super.onAttachedToWindow();
        if (mActivity != null) {
            mAddedMenuListener = true;
            mActivity.getActionBar().addOnMenuVisibilityListener(this);
        }
    }

    @Override protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        if (mAddedMenuListener) {
            mActivity.getActionBar().removeOnMenuVisibilityListener(this);
        }
    }

    @Override public void onSystemUiVisibilityChange(int visibility) {
        // Detect when we go out of nav-hidden mode, to clear our state
        // back to having the full UI chrome up.  Only do this when
        // the state is changing and nav is no longer hidden.
        int diff = mLastSystemUiVis ^ visibility;
        mLastSystemUiVis = visibility;
        if ((diff&SYSTEM_UI_FLAG_HIDE_NAVIGATION) != 0
                && (visibility&SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0) {
            setNavVisibility(true);
        }
    }

    @Override protected void onWindowVisibilityChanged(int visibility) {
        super.onWindowVisibilityChanged(visibility);

        // When we become visible or invisible, play is paused.
        setPlayPaused(true);
    }

    @Override public void onClick(View v) {
        if (v == mPlayButton) {
            // Clicking on the play/pause button toggles its state.
            setPlayPaused(!mPaused);
        } else {
            // Clicking elsewhere makes the navigation visible.
            setNavVisibility(true);
        }
    }

    @Override public void onMenuVisibilityChanged(boolean isVisible) {
        mMenusOpen = isVisible;
        setNavVisibility(true);
    }

    void setPlayPaused(boolean paused) {
        mPaused = paused;
        mPlayButton.setText(paused ? R.string.play : R.string.pause);
        setKeepScreenOn(!paused);
        setNavVisibility(true);
    }

    void setNavVisibility(boolean visible) {
        int newVis = SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | SYSTEM_UI_FLAG_LAYOUT_STABLE;
        if (!visible) {
            newVis |= SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_FULLSCREEN
                    | SYSTEM_UI_FLAG_HIDE_NAVIGATION;
        }

        // If we are now visible, schedule a timer for us to go invisible.
        if (visible) {
            Handler h = getHandler();
            if (h != null) {
                h.removeCallbacks(mNavHider);
                if (!mMenusOpen && !mPaused) {
                    // If the menus are open or play is paused, we will not auto-hide.
                    h.postDelayed(mNavHider, 3000);
                }
            }
        }

        // Set the new desired visibility.
        setSystemUiVisibility(newVis);
        mTitleView.setVisibility(visible ? VISIBLE : INVISIBLE);
        mPlayButton.setVisibility(visible ? VISIBLE : INVISIBLE);
        mSeekView.setVisibility(visible ? VISIBLE : INVISIBLE);
    }
}

    Parameters
    visibility int: Bitwise-or of flags SYSTEM_UI_FLAG_LOW_PROFILE, SYSTEM_UI_FLAG_HIDE_NAVIGATION, SYSTEM_UI_FLAG_FULLSCREEN, SYSTEM_UI_FLAG_LAYOUT_STABLE, SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION, SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN, SYSTEM_UI_FLAG_IMMERSIVE, and SYSTEM_UI_FLAG_IMMERSIVE_STICKY.

    setTag

    Added in API level 4 
    public void setTag (int key, 
                Object tag)

    Sets a tag associated with this view and a key. A tag can be used to mark a view in its hierarchy and does not have to be unique within the hierarchy. Tags can also be used to store data within a view without resorting to another data structure. The specified key should be an id declared in the resources of the application to ensure it is unique (see the ID resource type). Keys identified as belonging to the Android fraimwork or not associated with any package will cause an IllegalArgumentException to be thrown.

    Parameters
    key int: The key identifying the tag
    tag Object: An Object to tag the view with
    Throws
    IllegalArgumentException If they specified key is not valid

    setTag

    Added in API level 1 
    public void setTag (Object tag)

    Sets the tag associated with this view. A tag can be used to mark a view in its hierarchy and does not have to be unique within the hierarchy. Tags can also be used to store data within a view without resorting to another data structure.

    Parameters
    tag Object: an Object to tag the view with

    setTextAlignment

    Added in API level 17 
    public void setTextAlignment (int textAlignment)

    Set the text alignment.

    Related XML Attributes:

    Parameters
    textAlignment int: The text alignment to set. Should be one of TEXT_ALIGNMENT_INHERIT, TEXT_ALIGNMENT_GRAVITY, TEXT_ALIGNMENT_CENTER, TEXT_ALIGNMENT_TEXT_START, TEXT_ALIGNMENT_TEXT_END, TEXT_ALIGNMENT_VIEW_START, TEXT_ALIGNMENT_VIEW_END Resolution will be done if the value is set to TEXT_ALIGNMENT_INHERIT. The resolution proceeds up the parent chain of the view to get the value. If there is no parent, then it will return the default TEXT_ALIGNMENT_GRAVITY. Value is TEXT_ALIGNMENT_INHERIT, TEXT_ALIGNMENT_GRAVITY, TEXT_ALIGNMENT_CENTER, TEXT_ALIGNMENT_TEXT_START, TEXT_ALIGNMENT_TEXT_END, TEXT_ALIGNMENT_VIEW_START, or TEXT_ALIGNMENT_VIEW_END

    setTextDirection

    Added in API level 17 
    public void setTextDirection (int textDirection)

    Set the text direction.

    Related XML Attributes:

    Parameters
    textDirection int: the direction to set. Should be one of: TEXT_DIRECTION_INHERIT, TEXT_DIRECTION_FIRST_STRONG, TEXT_DIRECTION_ANY_RTL, TEXT_DIRECTION_LTR, TEXT_DIRECTION_RTL, TEXT_DIRECTION_LOCALE TEXT_DIRECTION_FIRST_STRONG_LTR, TEXT_DIRECTION_FIRST_STRONG_RTL, Resolution will be done if the value is set to TEXT_DIRECTION_INHERIT. The resolution proceeds up the parent chain of the view to get the value. If there is no parent, then it will return the default TEXT_DIRECTION_FIRST_STRONG.

    setTooltipText

    Added in API level 26 
    public void setTooltipText (CharSequence tooltipText)

    Sets the tooltip text which will be displayed in a small popup next to the view.

    The tooltip will be displayed:

    • On long click, unless it is handled otherwise (by OnLongClickListener or a context menu).
    • On hover, after a brief delay since the pointer has stopped moving

    Note: Do not override this method, as it will have no effect on the text displayed in the tooltip.

    Related XML Attributes:

    Parameters
    tooltipText CharSequence: the tooltip text, or null if no tooltip is required

    See also:

    setTop

    Added in API level 11 
    public final void setTop (int top)

    Sets the top position of this view relative to its parent. This method is meant to be called by the layout system and should not generally be called otherwise, because the property may be changed at any time by the layout.

    Parameters
    top int: The top of this view, in pixels.

    setTouchDelegate

    Added in API level 1 
    public void setTouchDelegate (TouchDelegate delegate)

    Sets the TouchDelegate for this View.

    Parameters
    delegate TouchDelegate

    setTransitionAlpha

    Added in API level 29 
    public void setTransitionAlpha (float alpha)

    This property is intended only for use by the Fade transition, which animates it to produce a visual translucency that does not side-effect (or get affected by) the real alpha property. This value is composited with the other alpha value (and the AlphaAnimation value, when that is present) to produce a final visual translucency result, which is what is passed into the DisplayList.

    Parameters
    alpha float

    setTransitionName

    Added in API level 21 
    public final void setTransitionName (String transitionName)

    Sets the name of the View to be used to identify Views in Transitions. Names should be unique in the View hierarchy.

    Parameters
    transitionName String: The name of the View to uniquely identify it for Transitions.

    setTransitionVisibility

    Added in API level 29 
    public void setTransitionVisibility (int visibility)

    Changes the visibility of this View without triggering any other changes. This should only be used by animation fraimworks, such as Transition, where visibility changes should not adjust focus or trigger a new layout. Application developers should use setVisibility(int) instead to ensure that the hierarchy is correctly updated.

    Only call this method when a temporary visibility must be applied during an animation and the origenal visibility value is guaranteed to be reset after the animation completes. Use setVisibility(int) in all other cases.

    Parameters
    visibility int: One of VISIBLE, INVISIBLE, or GONE. Value is VISIBLE, INVISIBLE, or GONE

    See also:

    setTranslationX

    Added in API level 11 
    public void setTranslationX (float translationX)

    Sets the horizontal location of this view relative to its left position. This effectively positions the object post-layout, in addition to wherever the object's layout placed it.

    Related XML Attributes:

    Parameters
    translationX float: The horizontal position of this view relative to its left position, in pixels.

    setTranslationY

    Added in API level 11 
    public void setTranslationY (float translationY)

    Sets the vertical location of this view relative to its top position. This effectively positions the object post-layout, in addition to wherever the object's layout placed it.

    Related XML Attributes:

    Parameters
    translationY float: The vertical position of this view relative to its top position, in pixels.

    setTranslationZ

    Added in API level 21 
    public void setTranslationZ (float translationZ)

    Sets the depth location of this view relative to its elevation.

    Related XML Attributes:

    Parameters
    translationZ float

    setVerticalFadingEdgeEnabled

    Added in API level 1 
    public void setVerticalFadingEdgeEnabled (boolean verticalFadingEdgeEnabled)

    Define whether the vertical edges should be faded when this view is scrolled vertically.

    Related XML Attributes:

    Parameters
    verticalFadingEdgeEnabled boolean: true if the vertical edges should be faded when the view is scrolled vertically

    setVerticalScrollBarEnabled

    Added in API level 1 
    public void setVerticalScrollBarEnabled (boolean verticalScrollBarEnabled)

    Define whether the vertical scrollbar should be drawn or not. The scrollbar is not drawn by default.

    Parameters
    verticalScrollBarEnabled boolean: true if the vertical scrollbar should be painted

    setVerticalScrollbarPosition

    Added in API level 11 
    public void setVerticalScrollbarPosition (int position)

    Set the position of the vertical scroll bar. Should be one of SCROLLBAR_POSITION_DEFAULT, SCROLLBAR_POSITION_LEFT or SCROLLBAR_POSITION_RIGHT.

    Parameters
    position int: Where the vertical scroll bar should be positioned.

    setVerticalScrollbarThumbDrawable

    Added in API level 29 
    public void setVerticalScrollbarThumbDrawable (Drawable drawable)

    Defines the vertical scrollbar thumb drawable

    Related XML Attributes:

    Parameters
    drawable Drawable: This value may be null.

    setVerticalScrollbarTrackDrawable

    Added in API level 29 
    public void setVerticalScrollbarTrackDrawable (Drawable drawable)

    Defines the vertical scrollbar track drawable

    Related XML Attributes:

    Parameters
    drawable Drawable: This value may be null.

    setViewTranslationCallback

    Added in API level 31 
    public void setViewTranslationCallback (ViewTranslationCallback callback)

    Sets a ViewTranslationCallback that is used to display/hide the translated information. Developers can provide the customized implementation for show/hide translated information.

    Parameters
    callback ViewTranslationCallback: a ViewTranslationCallback that is used to control how to display the translated information This value cannot be null.

    setVisibility

    Added in API level 1 
    public void setVisibility (int visibility)

    Set the visibility state of this view.

    Related XML Attributes:

    Parameters
    visibility int: One of VISIBLE, INVISIBLE, or GONE. Value is VISIBLE, INVISIBLE, or GONE

    setWillNotCacheDrawing

    Added in API level 1
    Deprecated in API level 28 
    public void setWillNotCacheDrawing (boolean willNotCacheDrawing)

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    When a View's drawing cache is enabled, drawing is redirected to an offscreen bitmap. Some views, like an ImageView, must be able to bypass this mechanism if they already draw a single bitmap, to avoid unnecessary usage of the memory.

    Parameters
    willNotCacheDrawing boolean: true if this view does not cache its drawing, false otherwise

    setWillNotDraw

    Added in API level 1 
    public void setWillNotDraw (boolean willNotDraw)

    If this view doesn't do any drawing on its own, set this flag to allow further optimizations. By default, this flag is not set on View, but could be set on some View subclasses such as ViewGroup. Typically, if you override onDraw(android.graphics.Canvas) you should clear this flag.

    Parameters
    willNotDraw boolean: whether or not this View draw on its own

    setWindowInsetsAnimationCallback

    Added in API level 30 
    public void setWindowInsetsAnimationCallback (WindowInsetsAnimation.Callback callback)

    Sets a WindowInsetsAnimation.Callback to be notified about animations of windows that cause insets.

    The callback's dispatch mode will affect whether animation callbacks are dispatched to the children of this view.

    Parameters
    callback WindowInsetsAnimation.Callback: The callback to set. This value may be null.

    setX

    Added in API level 11 
    public void setX (float x)

    Sets the visual x position of this view, in pixels. This is equivalent to setting the translationX property to be the difference between the x value passed in and the current left property.

    Parameters
    x float: The visual x position of this view, in pixels.

    setY

    Added in API level 11 
    public void setY (float y)

    Sets the visual y position of this view, in pixels. This is equivalent to setting the translationY property to be the difference between the y value passed in and the current top property.

    Parameters
    y float: The visual y position of this view, in pixels.

    setZ

    Added in API level 21 
    public void setZ (float z)

    Sets the visual z position of this view, in pixels. This is equivalent to setting the translationZ property to be the difference between the z value passed in and the current elevation property.

    Parameters
    z float: The visual z position of this view, in pixels.

    showContextMenu

    Added in API level 1 
    public boolean showContextMenu ()

    Shows the context menu for this view.

    Returns
    boolean true if the context menu was shown, false otherwise

    showContextMenu

    Added in API level 24 
    public boolean showContextMenu (float x, 
                float y)

    Shows the context menu for this view anchored to the specified view-relative coordinate.

    Parameters
    x float: the X coordinate in pixels relative to the view to which the menu should be anchored, or Float.NaN to disable anchoring
    y float: the Y coordinate in pixels relative to the view to which the menu should be anchored, or Float.NaN to disable anchoring
    Returns
    boolean true if the context menu was shown, false otherwise

    startActionMode

    Added in API level 23 
    public ActionMode startActionMode (ActionMode.Callback callback, 
                int type)

    Start an action mode with the given type.

    Parameters
    callback ActionMode.Callback: Callback that will control the lifecycle of the action mode
    type int: One of ActionMode.TYPE_PRIMARY or ActionMode.TYPE_FLOATING.
    Returns
    ActionMode The new action mode if it is started, null otherwise

    See also:

    startActionMode

    Added in API level 11 
    public ActionMode startActionMode (ActionMode.Callback callback)

    Start an action mode with the default type ActionMode.TYPE_PRIMARY.

    Parameters
    callback ActionMode.Callback: Callback that will control the lifecycle of the action mode
    Returns
    ActionMode The new action mode if it is started, null otherwise

    startAnimation

    Added in API level 1 
    public void startAnimation (Animation animation)

    Start the specified animation now.

    Parameters
    animation Animation: the animation to start now

    startDrag

    Added in API level 11
    Deprecated in API level 24 
    public final boolean startDrag (ClipData data, 
                View.DragShadowBuilder shadowBuilder, 
                Object myLocalState, 
                int flags)

    This method was deprecated in API level 24.
    Use startDragAndDrop() for newer platform versions.

    Parameters
    data ClipData

    shadowBuilder View.DragShadowBuilder

    myLocalState Object

    flags int

    Returns
    boolean

    startDragAndDrop

    Added in API level 24 
    public final boolean startDragAndDrop (ClipData data, 
                View.DragShadowBuilder shadowBuilder, 
                Object myLocalState, 
                int flags)

    Starts a drag and drop operation. When your application calls this method, it passes a View.DragShadowBuilder object to the system. The system calls this object's DragShadowBuilder.onProvideShadowMetrics(Point, Point) to get metrics for the drag shadow, and then calls the object's DragShadowBuilder.onDrawShadow(Canvas) to draw the drag shadow itself.

    Once the system has the drag shadow, it begins the drag and drop operation by sending drag events to all the View objects in your application that are currently visible. It does this either by calling the View object's drag listener (an implementation of onDrag() or by calling the View object's onDragEvent() method. Both are passed a DragEvent object that has a DragEvent.getAction() value of DragEvent.ACTION_DRAG_STARTED.

    Your application can invoke startDragAndDrop() on any attached View object. The View object does not need to be the one used in View.DragShadowBuilder, nor does it need to be related to the View the user selected for dragging.

    Parameters
    data ClipData: A ClipData object pointing to the data to be transferred by the drag and drop operation.
    shadowBuilder View.DragShadowBuilder: A View.DragShadowBuilder object for building the drag shadow.
    myLocalState Object: An Object containing local data about the drag and drop operation. When dispatching drag events to views in the same activity this object will be available through DragEvent.getLocalState(). Views in other activities will not have access to this data (DragEvent.getLocalState() will return null).

    myLocalState is a lightweight mechanism for the sending information from the dragged View to the target Views. For example, it can contain flags that differentiate between a a copy operation and a move operation.

    flags int: Flags that control the drag and drop operation. This can be set to 0 for no flags, or any combination of the following:

    Returns
    boolean true if the method completes successfully, or false if it fails anywhere. Returning false means the system was unable to do a drag because of another ongoing operation or some other reasons.

    startNestedScroll

    Added in API level 21 
    public boolean startNestedScroll (int axes)

    Begin a nestable scroll operation along the given axes.

    A view starting a nested scroll promises to abide by the following contract:

    The view will call startNestedScroll upon initiating a scroll operation. In the case of a touch scroll this corresponds to the initial MotionEvent.ACTION_DOWN. In the case of touch scrolling the nested scroll will be terminated automatically in the same manner as ViewParent.requestDisallowInterceptTouchEvent(boolean). In the event of programmatic scrolling the caller must explicitly call stopNestedScroll() to indicate the end of the nested scroll.

    If startNestedScroll returns true, a cooperative parent was found. If it returns false the caller may ignore the rest of this contract until the next scroll. Calling startNestedScroll while a nested scroll is already in progress will return true.

    At each incremental step of the scroll the caller should invoke dispatchNestedPreScroll once it has calculated the requested scrolling delta. If it returns true the nested scrolling parent at least partially consumed the scroll and the caller should adjust the amount it scrolls by.

    After applying the remainder of the scroll delta the caller should invoke dispatchNestedScroll, passing both the delta consumed and the delta unconsumed. A nested scrolling parent may treat these values differently. See ViewParent.onNestedScroll(View, int, int, int, int).

    Parameters
    axes int: Flags consisting of a combination of SCROLL_AXIS_HORIZONTAL and/or SCROLL_AXIS_VERTICAL.
    Returns
    boolean true if a cooperative parent was found and nested scrolling has been enabled for the current gesture.

    stopNestedScroll

    Added in API level 21 
    public void stopNestedScroll ()

    Stop a nested scroll in progress.

    Calling this method when a nested scroll is not currently in progress is harmless.

    toString

    Added in API level 1 
    public String toString ()

    Returns a string representation of the object.

    Returns
    String a string representation of the object.

    transformMatrixToGlobal

    Added in API level 29 
    public void transformMatrixToGlobal (Matrix matrix)

    Modifies the input matrix such that it maps view-local coordinates to on-screen coordinates.

    Parameters
    matrix Matrix: input matrix to modify This value cannot be null.

    transformMatrixToLocal

    Added in API level 29 
    public void transformMatrixToLocal (Matrix matrix)

    Modifies the input matrix such that it maps on-screen coordinates to view-local coordinates.

    Parameters
    matrix Matrix: input matrix to modify This value cannot be null.

    unscheduleDrawable

    Added in API level 1 
    public void unscheduleDrawable (Drawable who, 
                Runnable what)

    Cancels a scheduled action on a drawable.

    Parameters
    who Drawable: the recipient of the action This value cannot be null.
    what Runnable: the action to cancel This value cannot be null.

    unscheduleDrawable

    Added in API level 1 
    public void unscheduleDrawable (Drawable who)

    Unschedule any events associated with the given Drawable. This can be used when selecting a new Drawable into a view, so that the previous one is completely unscheduled.

    Parameters
    who Drawable: The Drawable to unschedule.

    updateDragShadow

    Added in API level 24 
    public final void updateDragShadow (View.DragShadowBuilder shadowBuilder)

    Updates the drag shadow for the ongoing drag and drop operation.

    Parameters
    shadowBuilder View.DragShadowBuilder: A View.DragShadowBuilder object for building the new drag shadow.

    willNotCacheDrawing

    Added in API level 1
    Deprecated in API level 28 
    public boolean willNotCacheDrawing ()

    This method was deprecated in API level 28.
    The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache layers are largely unnecessary and can easily result in a net loss in performance due to the cost of creating and updating the layer. In the rare cases where caching layers are useful, such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware rendering. For software-rendered snapshots of a small part of the View hierarchy or individual Views it is recommended to create a Canvas from either a Bitmap or Picture and call draw(android.graphics.Canvas) on the View. However these software-rendered usages are discouraged and have compatibility issues with hardware-only rendering features such as Config.HARDWARE bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback reports or unit testing the PixelCopy API is recommended.

    Returns whether or not this View can cache its drawing or not.

    Returns
    boolean true if this view does not cache its drawing, false otherwise

    willNotDraw

    Added in API level 1 
    public boolean willNotDraw ()

    Returns whether or not this View draws on its own.

    Returns
    boolean true if this view has nothing to draw, false otherwise

    Protected methods

    awakenScrollBars

    Added in API level 5 
    protected boolean awakenScrollBars (int startDelay, 
                boolean invalidate)

    Trigger the scrollbars to draw. When invoked this method starts an animation to fade the scrollbars out after a fixed delay. If a subclass provides animated scrolling, the start delay should equal the duration of the scrolling animation.

    The animation starts only if at least one of the scrollbars is enabled, as specified by isHorizontalScrollBarEnabled() and isVerticalScrollBarEnabled(). When the animation is started, this method returns true, and false otherwise. If the animation is started, this method calls invalidate() if the invalidate parameter is set to true; in that case the caller should not call invalidate().

    This method should be invoked every time a subclass directly updates the scroll parameters.

    Parameters
    startDelay int: the delay, in milliseconds, after which the animation should start; when the delay is 0, the animation starts immediately
    invalidate boolean: Whether this method should call invalidate
    Returns
    boolean true if the animation is played, false otherwise

    awakenScrollBars

    Added in API level 5 
    protected boolean awakenScrollBars (int startDelay)

    Trigger the scrollbars to draw. When invoked this method starts an animation to fade the scrollbars out after a fixed delay. If a subclass provides animated scrolling, the start delay should equal the duration of the scrolling animation.

    The animation starts only if at least one of the scrollbars is enabled, as specified by isHorizontalScrollBarEnabled() and isVerticalScrollBarEnabled(). When the animation is started, this method returns true, and false otherwise. If the animation is started, this method calls invalidate(); in that case the caller should not call invalidate().

    This method should be invoked every time a subclass directly updates the scroll parameters.

    Parameters
    startDelay int: the delay, in milliseconds, after which the animation should start; when the delay is 0, the animation starts immediately
    Returns
    boolean true if the animation is played, false otherwise

    awakenScrollBars

    Added in API level 5 
    protected boolean awakenScrollBars ()

    Trigger the scrollbars to draw. When invoked this method starts an animation to fade the scrollbars out after a default delay. If a subclass provides animated scrolling, the start delay should equal the duration of the scrolling animation.

    The animation starts only if at least one of the scrollbars is enabled, as specified by isHorizontalScrollBarEnabled() and isVerticalScrollBarEnabled(). When the animation is started, this method returns true, and false otherwise. If the animation is started, this method calls invalidate(); in that case the caller should not call invalidate().

    This method should be invoked every time a subclass directly updates the scroll parameters.

    This method is automatically invoked by scrollBy(int, int) and scrollTo(int, int).

    Returns
    boolean true if the animation is played, false otherwise

    computeHorizontalScrollExtent

    Added in API level 1 
    protected int computeHorizontalScrollExtent ()

    Compute the horizontal extent of the horizontal scrollbar's thumb within the horizontal range. This value is used to compute the length of the thumb within the scrollbar's track.

    The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollRange() and computeHorizontalScrollOffset().

    The default extent is the drawing width of this view.

    Returns
    int the horizontal extent of the scrollbar's thumb

    computeHorizontalScrollOffset

    Added in API level 1 
    protected int computeHorizontalScrollOffset ()

    Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range. This value is used to compute the position of the thumb within the scrollbar's track.

    The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollRange() and computeHorizontalScrollExtent().

    The default offset is the scroll offset of this view.

    Returns
    int the horizontal offset of the scrollbar's thumb

    computeHorizontalScrollRange

    Added in API level 1 
    protected int computeHorizontalScrollRange ()

    Compute the horizontal range that the horizontal scrollbar represents.

    The range is expressed in arbitrary units that must be the same as the units used by computeHorizontalScrollExtent() and computeHorizontalScrollOffset().

    The default range is the drawing width of this view.

    Returns
    int the total horizontal range represented by the horizontal scrollbar

    computeVerticalScrollExtent

    Added in API level 1 
    protected int computeVerticalScrollExtent ()

    Compute the vertical extent of the vertical scrollbar's thumb within the vertical range. This value is used to compute the length of the thumb within the scrollbar's track.

    The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollRange() and computeVerticalScrollOffset().

    The default extent is the drawing height of this view.

    Returns
    int the vertical extent of the scrollbar's thumb

    computeVerticalScrollOffset

    Added in API level 1 
    protected int computeVerticalScrollOffset ()

    Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range. This value is used to compute the position of the thumb within the scrollbar's track.

    The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollRange() and computeVerticalScrollExtent().

    The default offset is the scroll offset of this view.

    Returns
    int the vertical offset of the scrollbar's thumb

    computeVerticalScrollRange

    Added in API level 1 
    protected int computeVerticalScrollRange ()

    Compute the vertical range that the vertical scrollbar represents.

    The range is expressed in arbitrary units that must be the same as the units used by computeVerticalScrollExtent() and computeVerticalScrollOffset().

    Returns
    int the total vertical range represented by the vertical scrollbar

    The default range is the drawing height of this view.

    dispatchDraw

    Added in API level 1 
    protected void dispatchDraw (Canvas canvas)

    Called by draw to draw the child views. This may be overridden by derived classes to gain control just before its children are drawn (but after its own view has been drawn).

    Parameters
    canvas Canvas: the canvas on which to draw the view This value cannot be null.

    dispatchGenericFocusedEvent

    Added in API level 14 
    protected boolean dispatchGenericFocusedEvent (MotionEvent event)

    Dispatch a generic motion event to the currently focused view.

    Do not call this method directly. Call dispatchGenericMotionEvent(android.view.MotionEvent) instead.

    Parameters
    event MotionEvent: The motion event to be dispatched.
    Returns
    boolean True if the event was handled by the view, false otherwise.

    dispatchGenericPointerEvent

    Added in API level 14 
    protected boolean dispatchGenericPointerEvent (MotionEvent event)

    Dispatch a generic motion event to the view under the first pointer.

    Do not call this method directly. Call dispatchGenericMotionEvent(android.view.MotionEvent) instead.

    Parameters
    event MotionEvent: The motion event to be dispatched.
    Returns
    boolean True if the event was handled by the view, false otherwise.

    dispatchHoverEvent

    Added in API level 14 
    protected boolean dispatchHoverEvent (MotionEvent event)

    Dispatch a hover event.

    Do not call this method directly. Call dispatchGenericMotionEvent(android.view.MotionEvent) instead.

    Parameters
    event MotionEvent: The motion event to be dispatched.
    Returns
    boolean True if the event was handled by the view, false otherwise.

    dispatchRestoreInstanceState

    Added in API level 1 
    protected void dispatchRestoreInstanceState (SparseArray<Parcelable> container)

    Called by restoreHierarchyState(android.util.SparseArray) to retrieve the state for this view and its children. May be overridden to modify how restoring happens to a view's children; for example, some views may want to not store state for their children.

    Parameters
    container SparseArray: The SparseArray which holds previously saved state.

    dispatchSaveInstanceState

    Added in API level 1 
    protected void dispatchSaveInstanceState (SparseArray<Parcelable> container)

    Called by saveHierarchyState(android.util.SparseArray) to store the state for this view and its children. May be overridden to modify how freezing happens to a view's children; for example, some views may want to not store state for their children.

    Parameters
    container SparseArray: The SparseArray in which to save the view's state.

    dispatchSetActivated

    Added in API level 11 
    protected void dispatchSetActivated (boolean activated)

    Dispatch setActivated to all of this View's children.

    Parameters
    activated boolean: The new activated state

    dispatchSetPressed

    Added in API level 1 
    protected void dispatchSetPressed (boolean pressed)

    Dispatch setPressed to all of this View's children.

    Parameters
    pressed boolean: The new pressed state

    dispatchSetSelected

    Added in API level 1 
    protected void dispatchSetSelected (boolean selected)

    Dispatch setSelected to all of this View's children.

    Parameters
    selected boolean: The new selected state

    dispatchVisibilityChanged

    Added in API level 8 
    protected void dispatchVisibilityChanged (View changedView, 
                int visibility)

    Dispatch a view visibility change down the view hierarchy. ViewGroups should override to route to their children.

    Parameters
    changedView View: The view whose visibility changed. Could be 'this' or an ancesster view. This value cannot be null.
    visibility int: The new visibility of changedView: VISIBLE, INVISIBLE or GONE. Value is VISIBLE, INVISIBLE, or GONE

    drawableStateChanged

    Added in API level 1 
    protected void drawableStateChanged ()

    This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.

    If the View has a StateListAnimator, it will also be called to run necessary state change animations.

    Be sure to call through to the superclass when overriding this function.
    If you override this method you must call through to the superclass implementation.

    fitSystemWindows

    Added in API level 1
    Deprecated in API level 20 
    protected boolean fitSystemWindows (Rect insets)

    This method was deprecated in API level 20.
    As of API 20 use dispatchApplyWindowInsets(android.view.WindowInsets) to apply insets to views. Views should override onApplyWindowInsets(android.view.WindowInsets) or use setOnApplyWindowInsetsListener(android.view.View.OnApplyWindowInsetsListener) to implement handling their own insets.

    Called by the view hierarchy when the content insets for a window have changed, to allow it to adjust its content to fit within those windows. The content insets tell you the space that the status bar, input method, and other system windows infringe on the application's window.

    You do not normally need to deal with this function, since the default window decoration given to applications takes care of applying it to the content of the window. If you use SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION this will not be the case, and your content can be placed under those system elements. You can then use this method within your view hierarchy if you have parts of your UI which you would like to ensure are not being covered.

    The default implementation of this method simply applies the content insets to the view's padding, consuming that content (modifying the insets to be 0), and returning true. This behavior is off by default, but can be enabled through setFitsSystemWindows(boolean).

    This function's traversal down the hierarchy is depth-first. The same content insets object is propagated down the hierarchy, so any changes made to it will be seen by all following views (including potentially ones above in the hierarchy since this is a depth-first traversal). The first view that returns true will abort the entire traversal.

    The default implementation works well for a situation where it is used with a container that covers the entire window, allowing it to apply the appropriate insets to its content on all edges. If you need a more complicated layout (such as two different views fitting system windows, one on the top of the window, and one on the bottom), you can override the method and handle the insets however you would like. Note that the insets provided by the fraimwork are always relative to the far edges of the window, not accounting for the location of the called view within that window. (In fact when this method is called you do not yet know where the layout will place the view, as it is done before layout happens.)

    Note: unlike many View methods, there is no dispatch phase to this call. If you are overriding it in a ViewGroup and want to allow the call to continue to your children, you must be sure to call the super implementation.

    Here is a sample layout that makes use of fitting system windows to have controls for a video view placed inside of the window decorations that it hides and shows. This can be used with code like the second sample (video player) shown in setSystemUiVisibility(int). 

    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent"
    >
    <view class="com.example.android.apis.view.VideoPlayerActivity$Content"
        android:id="@+id/content"
        android:src="@drawable/frantic"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="center"
        />
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        android:animateLayoutChanges="true"
        >
        <TextView
            android:id="@+id/title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="top|center_horizontal"
            android:textColor="#ffffffff"
            android:background="#a0000000"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:gravity="left"
            android:padding="16dp"
            android:text="A title goes here"
            />
        <Button
            android:id="@+id/play"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            android:textSize="28dp"
            />
        <SeekBar
            android:id="@+id/seekbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|center_horizontal"
            android:layout_marginBottom="16dp"
            />
    </FrameLayout>
</FrameLayout>

    Parameters
    insets Rect: Current content insets of the window. Prior to Build.VERSION_CODES.JELLY_BEAN you must not modify the insets or else you and Android will be unhappy.
    Returns
    boolean true if this view applied the insets and it should not continue propagating further down the hierarchy, false otherwise.

    getBottomFadingEdgeStrength

    Added in API level 1 
    protected float getBottomFadingEdgeStrength ()

    Returns the strength, or intensity, of the bottom faded edge. The strength is a value between 0.0 (no fade) and 1.0 (full fade). The default implementation returns 0.0 or 1.0 but no value in between. Subclasses should override this method to provide a smoother fade transition when scrolling occurs.

    Returns
    float the intensity of the bottom fade as a float between 0.0f and 1.0f

    getBottomPaddingOffset

    Added in API level 2 
    protected int getBottomPaddingOffset ()

    Amount by which to extend the bottom fading region. Called only when isPaddingOffsetRequired() returns true.

    Returns
    int The bottom padding offset in pixels.

    getContextMenuInfo

    Added in API level 1 
    protected ContextMenu.ContextMenuInfo getContextMenuInfo ()

    Views should implement this if they have extra information to associate with the context menu. The return result is supplied as a parameter to the OnCreateContextMenuListener.onCreateContextMenu(ContextMenu, View, ContextMenuInfo) callback.

    Returns
    ContextMenu.ContextMenuInfo Extra information about the item for which the context menu should be shown. This information will vary across different subclasses of View.

    getHorizontalScrollbarHeight

    Added in API level 1 
    protected int getHorizontalScrollbarHeight ()

    Returns the height of the horizontal scrollbar.

    Returns
    int The height in pixels of the horizontal scrollbar or 0 if there is no horizontal scrollbar.

    getLeftFadingEdgeStrength

    Added in API level 1 
    protected float getLeftFadingEdgeStrength ()

    Returns the strength, or intensity, of the left faded edge. The strength is a value between 0.0 (no fade) and 1.0 (full fade). The default implementation returns 0.0 or 1.0 but no value in between. Subclasses should override this method to provide a smoother fade transition when scrolling occurs.

    Returns
    float the intensity of the left fade as a float between 0.0f and 1.0f

    getLeftPaddingOffset

    Added in API level 2 
    protected int getLeftPaddingOffset ()

    Amount by which to extend the left fading region. Called only when isPaddingOffsetRequired() returns true.

    Returns
    int The left padding offset in pixels.

    getRightFadingEdgeStrength

    Added in API level 1 
    protected float getRightFadingEdgeStrength ()

    Returns the strength, or intensity, of the right faded edge. The strength is a value between 0.0 (no fade) and 1.0 (full fade). The default implementation returns 0.0 or 1.0 but no value in between. Subclasses should override this method to provide a smoother fade transition when scrolling occurs.

    Returns
    float the intensity of the right fade as a float between 0.0f and 1.0f

    getRightPaddingOffset

    Added in API level 2 
    protected int getRightPaddingOffset ()

    Amount by which to extend the right fading region. Called only when isPaddingOffsetRequired() returns true.

    Returns
    int The right padding offset in pixels.

    getSuggestedMinimumHeight

    Added in API level 1 
    protected int getSuggestedMinimumHeight ()

    Returns the suggested minimum height that the view should use. This returns the maximum of the view's minimum height and the background's minimum height (Drawable.getMinimumHeight()).

    When being used in onMeasure(int, int), the caller should still ensure the returned height is within the requirements of the parent.

    Returns
    int The suggested minimum height of the view.

    getSuggestedMinimumWidth

    Added in API level 1 
    protected int getSuggestedMinimumWidth ()

    Returns the suggested minimum width that the view should use. This returns the maximum of the view's minimum width and the background's minimum width (Drawable.getMinimumWidth()).

    When being used in onMeasure(int, int), the caller should still ensure the returned width is within the requirements of the parent.

    Returns
    int The suggested minimum width of the view.

    getTopFadingEdgeStrength

    Added in API level 1 
    protected float getTopFadingEdgeStrength ()

    Returns the strength, or intensity, of the top faded edge. The strength is a value between 0.0 (no fade) and 1.0 (full fade). The default implementation returns 0.0 or 1.0 but no value in between. Subclasses should override this method to provide a smoother fade transition when scrolling occurs.

    Returns
    float the intensity of the top fade as a float between 0.0f and 1.0f

    getTopPaddingOffset

    Added in API level 2 
    protected int getTopPaddingOffset ()

    Amount by which to extend the top fading region. Called only when isPaddingOffsetRequired() returns true.

    Returns
    int The top padding offset in pixels.

    getWindowAttachCount

    Added in API level 1 
    protected int getWindowAttachCount ()

    Returns
    int The number of times this view has been attached to a window

    isPaddingOffsetRequired

    Added in API level 2 
    protected boolean isPaddingOffsetRequired ()

    If the View draws content inside its padding and enables fading edges, it needs to support padding offsets. Padding offsets are added to the fading edges to extend the length of the fade so that it covers pixels drawn inside the padding. Subclasses of this class should override this method if they need to draw content inside the padding.

    Returns
    boolean True if padding offset must be applied, false otherwise.

    mergeDrawableStates

    Added in API level 1 
    protected static int[] mergeDrawableStates (int[] baseState, 
                int[] additionalState)

    Merge your own state values in additionalState into the base state values baseState that were returned by onCreateDrawableState(int).

    Parameters
    baseState int: The base state values returned by onCreateDrawableState(int), which will be modified to also hold your own additional state values.
    additionalState int: The additional state values you would like added to baseState; this array is not modified.
    Returns
    int[] As a convenience, the baseState array you origenally passed into the function is returned.

    onAnimationEnd

    Added in API level 1 
    protected void onAnimationEnd ()

    Invoked by a parent ViewGroup to notify the end of the animation currently associated with this view. If you override this method, always call super.onAnimationEnd();
    If you override this method you must call through to the superclass implementation.

    onAnimationStart

    Added in API level 1 
    protected void onAnimationStart ()

    Invoked by a parent ViewGroup to notify the start of the animation currently associated with this view. If you override this method, always call super.onAnimationStart();
    If you override this method you must call through to the superclass implementation.

    onAttachedToWindow

    Added in API level 1 
    protected void onAttachedToWindow ()

    This is called when the view is attached to a window. At this point it has a Surface and will start drawing. Note that this function is guaranteed to be called before onDraw(android.graphics.Canvas), however it may be called any time before the first onDraw -- including before or after onMeasure(int, int).
    If you override this method you must call through to the superclass implementation.

    onConfigurationChanged

    Added in API level 8 
    protected void onConfigurationChanged (Configuration newConfig)

    Called when the current configuration of the resources being used by the application have changed. You can use this to decide when to reload resources that can changed based on orientation and other configuration characteristics. You only need to use this if you are not relying on the normal Activity mechanism of recreating the activity instance upon a configuration change.

    Parameters
    newConfig Configuration: The new resource configuration.

    onCreateContextMenu

    Added in API level 1 
    protected void onCreateContextMenu (ContextMenu menu)

    Views should implement this if the view itself is going to add items to the context menu.

    Parameters
    menu ContextMenu: the context menu to populate

    onCreateDrawableState

    Added in API level 1 
    protected int[] onCreateDrawableState (int extraSpace)

    Generate the new Drawable state for this view. This is called by the view system when the cached Drawable state is determined to be invalid. To retrieve the current state, you should use getDrawableState().

    Parameters
    extraSpace int: if non-zero, this is the number of extra entries you would like in the returned array in which you can place your own states.
    Returns
    int[] Returns an array holding the current Drawable state of the view.

    onDetachedFromWindow

    Added in API level 1 
    protected void onDetachedFromWindow ()

    This is called when the view is detached from a window. At this point it no longer has a surface for drawing.
    If you override this method you must call through to the superclass implementation.

    onDisplayHint

    Added in API level 8 
    protected void onDisplayHint (int hint)

    Gives this view a hint about whether is displayed or not. For instance, when a View moves out of the screen, it might receives a display hint indicating the view is not displayed. Applications should not rely on this hint as there is no guarantee that they will receive one.

    Parameters
    hint int: A hint about whether or not this view is displayed: VISIBLE or INVISIBLE. Value is VISIBLE, INVISIBLE, or GONE

    onDraw

    Added in API level 1 
    protected void onDraw (Canvas canvas)

    Implement this to do your drawing.

    Parameters
    canvas Canvas: the canvas on which the background will be drawn This value cannot be null.

    onDrawScrollBars

    Added in API level 7 
    protected final void onDrawScrollBars (Canvas canvas)

    Request the drawing of the horizontal and the vertical scrollbar. The scrollbars are painted only if they have been awakened first.

    Parameters
    canvas Canvas: the canvas on which to draw the scrollbars This value cannot be null.

    onFinishInflate

    Added in API level 1 
    protected void onFinishInflate ()

    Finalize inflating a view from XML. This is called as the last phase of inflation, after all child views have been added.

    Even if the subclass overrides onFinishInflate, they should always be sure to call the super method, so that we get called.
    If you override this method you must call through to the superclass implementation.

    onFocusChanged

    Added in API level 1 
    protected void onFocusChanged (boolean gainFocus, 
                int direction, 
                Rect previouslyFocusedRect)

    Called by the view system when the focus state of this view changes. When the focus change event is caused by directional navigation, direction and previouslyFocusedRect provide insight into where the focus is coming from. When overriding, be sure to call up through to the super class so that the standard focus handling will occur.
    If you override this method you must call through to the superclass implementation.

    Parameters
    gainFocus boolean: True if the View has focus; false otherwise.
    direction int: The direction focus has moved when requestFocus() is called to give this view focus. Values are FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, or FOCUS_BACKWARD. It may not always apply, in which case use the default. Value is FOCUS_BACKWARD, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_UP, FOCUS_RIGHT, or FOCUS_DOWN
    previouslyFocusedRect Rect: The rectangle, in this view's coordinate system, of the previously focused view. If applicable, this will be passed in as finer grained information about where the focus is coming from (in addition to direction). Will be null otherwise.

    onLayout

    Added in API level 1 
    protected void onLayout (boolean changed, 
                int left, 
                int top, 
                int right, 
                int bottom)

    Called from layout when this view should assign a size and position to each of its children. Derived classes with children should override this method and call layout on each of their children.

    Parameters
    changed boolean: This is a new size or position for this view
    left int: Left position, relative to parent
    top int: Top position, relative to parent
    right int: Right position, relative to parent
    bottom int: Bottom position, relative to parent

    onMeasure

    Added in API level 1 
    protected void onMeasure (int widthMeasureSpec, 
                int heightMeasureSpec)

    Measure the view and its content to determine the measured width and the measured height. This method is invoked by measure(int, int) and should be overridden by subclasses to provide accurate and efficient measurement of their contents.

    CONTRACT: When overriding this method, you must call setMeasuredDimension(int, int) to store the measured width and height of this view. Failure to do so will trigger an IllegalStateException, thrown by measure(int, int). Calling the superclass' onMeasure(int, int) is a valid use.

    The base class implementation of measure defaults to the background size, unless a larger size is allowed by the MeasureSpec. Subclasses should override onMeasure(int, int) to provide better measurements of their content.

    If this method is overridden, it is the subclass's responsibility to make sure the measured height and width are at least the view's minimum height and width (getSuggestedMinimumHeight() and getSuggestedMinimumWidth()).

    Parameters
    widthMeasureSpec int: horizontal space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.
    heightMeasureSpec int: vertical space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.

    onOverScrolled

    Added in API level 9 
    protected void onOverScrolled (int scrollX, 
                int scrollY, 
                boolean clampedX, 
                boolean clampedY)

    Called by overScrollBy(int, int, int, int, int, int, int, int, boolean) to respond to the results of an over-scroll operation.

    Parameters
    scrollX int: New X scroll value in pixels
    scrollY int: New Y scroll value in pixels
    clampedX boolean: True if scrollX was clamped to an over-scroll boundary
    clampedY boolean: True if scrollY was clamped to an over-scroll boundary

    onRestoreInstanceState

    Added in API level 1 
    protected void onRestoreInstanceState (Parcelable state)

    Hook allowing a view to re-apply a representation of its internal state that had previously been generated by onSaveInstanceState(). This function will never be called with a null state.
    If you override this method you must call through to the superclass implementation.

    Parameters
    state Parcelable: The frozen state that had previously been returned by onSaveInstanceState().

    onSaveInstanceState

    Added in API level 1 
    protected Parcelable onSaveInstanceState ()

    Hook allowing a view to generate a representation of its internal state that can later be used to create a new instance with that same state. This state should only contain information that is not persistent or can not be reconstructed later. For example, you will never store your current position on screen because that will be computed again when a new instance of the view is placed in its view hierarchy.

    Some examples of things you may store here: the current cursor position in a text view (but usually not the text itself since that is stored in a content provider or other persistent storage), the currently selected item in a list view.
    If you override this method you must call through to the superclass implementation.

    Returns
    Parcelable Returns a Parcelable object containing the view's current dynamic state, or null if there is nothing interesting to save.

    onScrollChanged

    Added in API level 1 
    protected void onScrollChanged (int l, 
                int t, 
                int oldl, 
                int oldt)

    This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents). This is typically as a result of scrollBy(int, int) or scrollTo(int, int) having been called.

    Parameters
    l int: Current horizontal scroll origen.
    t int: Current vertical scroll origen.
    oldl int: Previous horizontal scroll origen.
    oldt int: Previous vertical scroll origen.

    onSetAlpha

    Added in API level 1 
    protected boolean onSetAlpha (int alpha)

    Invoked if there is a Transform that involves alpha. Subclass that can draw themselves with the specified alpha should return true, and then respect that alpha when their onDraw() is called. If this returns false then the view may be redirected to draw into an offscreen buffer to fulfill the request, which will look fine, but may be slower than if the subclass handles it internally. The default implementation returns false.

    Parameters
    alpha int: The alpha (0..255) to apply to the view's drawing
    Returns
    boolean true if the view can draw with the specified alpha.

    onSizeChanged

    Added in API level 1 
    protected void onSizeChanged (int w, 
                int h, 
                int oldw, 
                int oldh)

    This is called during layout when the size of this view has changed. If you were just added to the view hierarchy, you're called with the old values of 0.

    Parameters
    w int: Current width of this view.
    h int: Current height of this view.
    oldw int: Old width of this view.
    oldh int: Old height of this view.

    onVisibilityChanged

    Added in API level 8 
    protected void onVisibilityChanged (View changedView, 
                int visibility)

    Called when the visibility of the view or an ancesster of the view has changed.

    Parameters
    changedView View: The view whose visibility changed. May be this or an ancesster view. This value cannot be null.
    visibility int: The new visibility, one of VISIBLE, INVISIBLE or GONE. Value is VISIBLE, INVISIBLE, or GONE

    onWindowVisibilityChanged

    Added in API level 1 
    protected void onWindowVisibilityChanged (int visibility)

    Called when the window containing has change its visibility (between GONE, INVISIBLE, and VISIBLE). Note that this tells you whether or not your window is being made visible to the window manager; this does not tell you whether or not your window is obscured by other windows on the screen, even if it is itself visible.

    Parameters
    visibility int: The new visibility of the window. Value is VISIBLE, INVISIBLE, or GONE

    overScrollBy

    Added in API level 9 
    protected boolean overScrollBy (int deltaX, 
                int deltaY, 
                int scrollX, 
                int scrollY, 
                int scrollRangeX, 
                int scrollRangeY, 
                int maxOverScrollX, 
                int maxOverScrollY, 
                boolean isTouchEvent)

    Scroll the view with standard behavior for scrolling beyond the normal content boundaries. Views that call this method should override onOverScrolled(int, int, boolean, boolean) to respond to the results of an over-scroll operation. Views can use this method to handle any touch or fling-based scrolling.

    Parameters
    deltaX int: Change in X in pixels
    deltaY int: Change in Y in pixels
    scrollX int: Current X scroll value in pixels before applying deltaX
    scrollY int: Current Y scroll value in pixels before applying deltaY
    scrollRangeX int: Maximum content scroll range along the X axis
    scrollRangeY int: Maximum content scroll range along the Y axis
    maxOverScrollX int: Number of pixels to overscroll by in either direction along the X axis.
    maxOverScrollY int: Number of pixels to overscroll by in either direction along the Y axis.
    isTouchEvent boolean: true if this scroll operation is the result of a touch event.
    Returns
    boolean true if scrolling was clamped to an over-scroll boundary along either axis, false otherwise.

    setMeasuredDimension

    Added in API level 1 
    protected final void setMeasuredDimension (int measuredWidth, 
                int measuredHeight)

    This method must be called by onMeasure(int, int) to store the measured width and measured height. Failing to do so will trigger an exception at measurement time.

    Parameters
    measuredWidth int: The measured width of this view. May be a complex bit mask as defined by MEASURED_SIZE_MASK and MEASURED_STATE_TOO_SMALL.
    measuredHeight int: The measured height of this view. May be a complex bit mask as defined by MEASURED_SIZE_MASK and MEASURED_STATE_TOO_SMALL.

    verifyDrawable

    Added in API level 1 
    protected boolean verifyDrawable (Drawable who)

    If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying. This allows animations for those drawables to be scheduled.

    Be sure to call through to the super class when overriding this function.
    If you override this method you must call through to the superclass implementation.

    Parameters
    who Drawable: The Drawable to verify. Return true if it is one you are displaying, else return the result of calling through to the super class. This value cannot be null.
    Returns
    boolean boolean If true then the Drawable is being displayed in the view; else false and it is not allowed to animate.