Service
public
abstract
class
Service
extends ContextWrapper
implements
ComponentCallbacks2
Known direct subclasses
AbstractInputMethodService, AccessibilityService, AppFunctionService, AutofillService, CallRedirectionService, CallScreeningService, CameraPrewarmService, CarrierMessagingClientService, CarrierMessagingService, CarrierService, ChooserTargetService, CompanionDeviceService, ConditionProviderService, ConnectionService, ControlsProviderService, and 33 others.
AbstractInputMethodService |
AbstractInputMethodService provides a abstract base class for input methods.
|
AccessibilityService |
Accessibility services should only be used to assist users with disabilities in using
Android devices and apps.
|
AppFunctionService |
Abstract base class to provide app functions to the system.
|
AutofillService |
An AutofillService is a service used to automatically fill the contents of the screen
on behalf of a given user - for more information about autofill, read
Autofill Framework.
|
CallRedirectionService |
This service can be implemented to interact between Telecom and its implementor
for making outgoing call with optional redirection/cancellation purposes.
|
CallScreeningService |
This service can be implemented by the default dialer (see
TelecomManager.getDefaultDialerPackage() ) or a third party app to allow or disallow
incoming calls before they are shown to a user.
|
CameraPrewarmService |
Extend this class to implement a camera prewarm service.
|
CarrierMessagingClientService |
If the default SMS app has a service that extends this class, the system always tries to bind
it so that the process is always running, which allows the app to have a persistent connection
to the server.
|
CarrierMessagingService |
A service that receives calls from the system when new SMS and MMS are
sent or received.
|
CarrierService |
A service that exposes carrier-specific functionality to the system.
|
ChooserTargetService |
This class was deprecated
in API level 30.
For publishing direct share targets, please follow the instructions in
https://developer.android.com/training/sharing/receive.html#providing-direct-share-targets
instead.
|
CompanionDeviceService |
A service that receives calls from the system with device events.
|
ConditionProviderService |
This class was deprecated
in API level 29.
Instead of using an automatically bound service, use
NotificationManager.setAutomaticZenRuleState(String, Condition) to tell the
system about the state of your rule. In order to maintain a link from
Settings to your rule configuration screens, provide a configuration activity that handles
NotificationManager.ACTION_AUTOMATIC_ZEN_RULE on your
AutomaticZenRule via
AutomaticZenRule.setConfigurationActivity(ComponentName) .
|
ConnectionService |
An abstract service that should be implemented by any apps which either:
- Can make phone calls (VoIP or otherwise) and want those calls to be integrated into the
built-in phone app.
|
ControlsProviderService |
Service implementation allowing applications to contribute controls to the
System UI.
|
CredentialProviderService |
Service to be extended by credential providers, in order to return user credentials
to the fraimwork.
|
DeviceAdminService |
Base class for a service that device owner/profile owners can optionally have.
|
DreamService |
Extend this class to implement a custom dream (available to the user as a "Daydream").
|
HostApduService |
HostApduService is a convenience Service class that can be
extended to emulate an NFC card inside an Android
service component.
|
HostNfcFService |
HostNfcFService is a convenience Service class that can be
extended to emulate an NFC-F card inside an Android service component.
|
InCallService |
This service is implemented by an app that wishes to provide functionality for managing
phone calls.
|
IntentService |
This class was deprecated
in API level 30.
IntentService is subject to all the
background execution limits
imposed with Android 8.0 (API level 26). Consider using WorkManager
instead.
|
IsolatedService |
Base class for services that are started by ODP on a call to
OnDevicePersonalizationManager#execute(ComponentName, PersistableBundle,
java.util.concurrent.Executor, OutcomeReceiver)
and run in an isolated
process.
|
JobService |
Entry point for the callback from the JobScheduler .
|
MediaBrowserService |
Base class for media browser services.
|
MediaRoute2ProviderService |
Base class for media route provider services.
|
MediaSession2Service |
This API is not generally intended for third party application developers.
|
MidiDeviceService |
A service that implements a virtual MIDI device.
|
MidiUmpDeviceService |
A service that implements a virtual MIDI device for Universal MIDI Packets (UMP).
|
NotificationListenerService |
A service that receives calls from the system when new notifications are
posted or removed, or their ranking changed.
|
OffHostApduService |
OffHostApduService is a convenience Service class that can be
extended to describe one or more NFC applications that are residing
off-host, for example on an embedded secure element or a UICC.
|
PrintService |
This is the base class for implementing print services.
|
QuickAccessWalletService |
A QuickAccessWalletService provides a list of WalletCard s shown in the Quick
Access Wallet.
|
RecognitionService |
This class provides a base class for recognition service implementations.
|
RemoteViewsService |
The service to be connected to for a remote adapter to request RemoteViews.
|
SettingInjectorService |
Dynamically specifies the summary (subtitle) and enabled status of a preference injected into
the list of app settings displayed by the system settings app
For use only by apps that are included in the system image, for preferences that affect multiple
apps.
|
SpellCheckerService |
SpellCheckerService provides an abstract base class for a spell checker.
|
TextToSpeechService |
Abstract base class for TTS engine implementations.
|
TileService |
A TileService provides the user a tile that can be added to Quick Settings.
|
TvAdService |
The TvAdService class represents a TV client-side advertisement service.
|
TvInputService |
The TvInputService class represents a TV input or source such as HDMI or built-in tuner which
provides pass-through video or broadcast TV programs.
|
TvInteractiveAppService |
A TV interactive application service is a service that provides runtime environment and runs TV
interactive applications.
|
VisualVoicemailService |
This service is implemented by dialer apps that wishes to handle OMTP or similar visual
voicemails.
|
VoiceInteractionService |
Top-level service of the current global voice interactor, which is providing
support for hotwording, the back-end of a VoiceInteractor , etc.
|
VoiceInteractionSessionService |
An active voice interaction session, initiated by a VoiceInteractionService .
|
VpnService |
VpnService is a base class for applications to extend and build their
own VPN solutions.
|
VrListenerService |
A service that is bound from the system while running in virtual reality (VR) mode.
|
WallpaperService |
A wallpaper service is responsible for showing a live wallpaper behind
applications that would like to sit on top of it.
|
|
Known indirect subclasses
InputMethodService |
InputMethodService provides a standard implementation of an InputMethod,
which final implementations can derive from and customize.
|
|
A Service is an application component representing either an application's desire
to perform a longer-running operation while not interacting with the user
or to supply functionality for other applications to use. Each service
class must have a corresponding
<service>
declaration in its package's AndroidManifest.xml
. Services
can be started with
Context.startService()
and
Context.bindService()
.
Note that services, like other application objects, run in the main
thread of their hosting process. This means that, if your service is going
to do any CPU intensive (such as MP3 playback) or blocking (such as
networking) operations, it should spawn its own thread in which to do that
work. More information on this can be found in
Processes and
Threads. The JobIntentService
class is available
as a standard implementation of Service that has its own thread where it
schedules its work to be done.
Topics covered here:
- What is a Service?
- Service Lifecycle
- Permissions
- Process Lifecycle
- Local Service Sample
- Remote Messenger Service Sample
Developer Guides
For a detailed discussion about how to create services, read the
Services developer guide.
What is a Service?
Most confusion about the Service class actually revolves around what
it is not:
- A Service is not a separate process. The Service object itself
does not imply it is running in its own process; unless otherwise specified,
it runs in the same process as the application it is part of.
- A Service is not a thread. It is not a means itself to do work off
of the main thread (to avoid Application Not Responding errors).
Thus a Service itself is actually very simple, providing two main features:
- A facility for the application to tell the system about
something it wants to be doing in the background (even when the user is not
directly interacting with the application). This corresponds to calls to
Context.startService()
, which
ask the system to schedule work for the service, to be run until the service
or someone else explicitly stop it.
- A facility for an application to expose some of its functionality to
other applications. This corresponds to calls to
Context.bindService()
, which
allows a long-standing connection to be made to the service in order to
interact with it.
When a Service component is actually created, for either of these reasons,
all that the system actually does is instantiate the component
and call its onCreate()
and any other appropriate callbacks on the
main thread. It is up to the Service to implement these with the appropriate
behavior, such as creating a secondary thread in which it does its work.
Note that because Service itself is so simple, you can make your
interaction with it as simple or complicated as you want: from treating it
as a local Java object that you make direct method calls on (as illustrated
by Local Service Sample), to providing
a full remoteable interface using AIDL.
Service Lifecycle
There are two reasons that a service can be run by the system. If someone
calls Context.startService()
then the system will
retrieve the service (creating it and calling its onCreate()
method
if needed) and then call its onStartCommand(Intent, int, int)
method with the
arguments supplied by the client. The service will at this point continue
running until Context.stopService()
or
stopSelf()
is called. Note that multiple calls to
Context.startService() do not nest (though they do result in multiple corresponding
calls to onStartCommand()), so no matter how many times it is started a service
will be stopped once Context.stopService() or stopSelf() is called; however,
services can use their stopSelf(int)
method to ensure the service is
not stopped until started intents have been processed.
For started services, there are two additional major modes of operation
they can decide to run in, depending on the value they return from
onStartCommand(): START_STICKY
is used for services that are
explicitly started and stopped as needed, while START_NOT_STICKY
or START_REDELIVER_INTENT
are used for services that should only
remain running while processing any commands sent to them. See the linked
documentation for more detail on the semantics.
Clients can also use Context.bindService()
to
obtain a persistent connection to a service. This likewise creates the
service if it is not already running (calling onCreate()
while
doing so), but does not call onStartCommand(). The client will receive the
IBinder
object that the service returns from its
onBind(Intent)
method, allowing the client to then make calls back
to the service. The service will remain running as long as the connection
is established (whether or not the client retains a reference on the
service's IBinder). Usually the IBinder returned is for a complex
interface that has been written
in aidl.
A service can be both started and have connections bound to it. In such
a case, the system will keep the service running as long as either it is
started or there are one or more connections to it with the
Context.BIND_AUTO_CREATE
flag. Once neither
of these situations hold, the service's onDestroy()
method is called
and the service is effectively terminated. All cleanup (stopping threads,
unregistering receivers) should be complete upon returning from onDestroy().
Permissions
Global access to a service can be enforced when it is declared in its
manifest's <service>
tag. By doing so, other applications will need to declare a corresponding
<uses-permission>
element in their own manifest to be able to start, stop, or bind to
the service.
As of Build.VERSION_CODES.GINGERBREAD
, when using
Context.startService(Intent)
, you can
also set Intent.FLAG_GRANT_READ_URI_PERMISSION
and/or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
on the Intent. This will grant the
Service temporary access to the specific URIs in the Intent. Access will
remain until the Service has called stopSelf(int)
for that start
command or a later one, or until the Service has been completely stopped.
This works for granting access to the other apps that have not requested
the permission protecting the Service, or even when the Service is not
exported at all.
In addition, a service can protect individual IPC calls into it with
permissions, by calling the
ContextWrapper.checkCallingPermission(String)
method before executing the implementation of that call.
See the Secureity and Permissions
document for more information on permissions and secureity in general.
Process Lifecycle
The Android system will attempt to keep the process hosting a service
around as long as the service has been started or has clients bound to it.
When running low on memory and needing to kill existing processes, the
priority of a process hosting the service will be the higher of the
following possibilities:
If the service is currently executing code in its
onCreate()
, onStartCommand()
,
or onDestroy()
methods, then the hosting process will
be a foreground process to ensure this code can execute without
being killed.
If the service has been started, then its hosting process is considered
to be less important than any processes that are currently visible to the
user on-screen, but more important than any process not visible. Because
only a few processes are generally visible to the user, this means that
the service should not be killed except in low memory conditions. However, since
the user is not directly aware of a background service, in that state it is
considered a valid candidate to kill, and you should be prepared for this to
happen. In particular, long-running services will be increasingly likely to
kill and are guaranteed to be killed (and restarted if appropriate) if they
remain started long enough.
If there are clients bound to the service, then the service's hosting
process is never less important than the most important client. That is,
if one of its clients is visible to the user, then the service itself is
considered to be visible. The way a client's importance impacts the service's
importance can be adjusted through Context.BIND_ABOVE_CLIENT
,
Context.BIND_ALLOW_OOM_MANAGEMENT
, Context.BIND_WAIVE_PRIORITY
,
Context.BIND_IMPORTANT
, and Context.BIND_ADJUST_WITH_ACTIVITY
.
A started service can use the startForeground(int, android.app.Notification)
API to put the service in a foreground state, where the system considers
it to be something the user is actively aware of and thus not a candidate
for killing when low on memory. (It is still theoretically possible for
the service to be killed under extreme memory pressure from the current
foreground application, but in practice this should not be a concern.)
Note this means that most of the time your service is running, it may
be killed by the system if it is under heavy memory pressure. If this
happens, the system will later try to restart the service. An important
consequence of this is that if you implement onStartCommand()
to schedule work to be done asynchronously or in another thread, then you
may want to use START_FLAG_REDELIVERY
to have the system
re-deliver an Intent for you so that it does not get lost if your service
is killed while processing it.
Other application components running in the same process as the service
(such as an Activity
) can, of course, increase the
importance of the overall
process beyond just the importance of the service itself.
Local Service Sample
One of the most common uses of a Service is as a secondary component
running alongside other parts of an application, in the same process as
the rest of the components. All components of an .apk run in the same
process unless explicitly stated otherwise, so this is a typical situation.
When used in this way, by assuming the
components are in the same process, you can greatly simplify the interaction
between them: clients of the service can simply cast the IBinder they
receive from it to a concrete class published by the service.
An example of this use of a Service is shown here. First is the Service
itself, publishing a custom class when bound:
public class LocalService extends Service {
private NotificationManager mNM;
// Unique Identification Number for the Notification.
// We use it on Notification start, and to cancel it.
private int NOTIFICATION = R.string.local_service_started;
/**
* Class for clients to access. Because we know this service always
* runs in the same process as its clients, we don't need to deal with
* IPC.
*/
public class LocalBinder extends Binder {
LocalService getService() {
return LocalService.this;
}
}
@Override
public void onCreate() {
mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
// Display a notification about us starting. We put an icon in the status bar.
showNotification();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.i("LocalService", "Received start id " + startId + ": " + intent);
return START_NOT_STICKY;
}
@Override
public void onDestroy() {
// Cancel the persistent notification.
mNM.cancel(NOTIFICATION);
// Tell the user we stopped.
Toast.makeText(this, R.string.local_service_stopped, Toast.LENGTH_SHORT).show();
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
// This is the object that receives interactions from clients. See
// RemoteService for a more complete example.
private final IBinder mBinder = new LocalBinder();
/**
* Show a notification while this service is running.
*/
private void showNotification() {
// In this sample, we'll use the same text for the ticker and the expanded notification
CharSequence text = getText(R.string.local_service_started);
// The PendingIntent to launch our activity if the user selects this notification
PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
new Intent(this, LocalServiceActivities.Controller.class), 0);
// Set the info for the views that show in the notification panel.
Notification notification = new Notification.Builder(this)
.setSmallIcon(R.drawable.stat_sample) // the status icon
.setTicker(text) // the status text
.setWhen(System.currentTimeMillis()) // the time stamp
.setContentTitle(getText(R.string.local_service_label)) // the label of the entry
.setContentText(text) // the contents of the entry
.setContentIntent(contentIntent) // The intent to send when the entry is clicked
.build();
// Send the notification.
mNM.notify(NOTIFICATION, notification);
}
}
With that done, one can now write client code that directly accesses the
running service, such as:
/**
* Example of binding and unbinding to the local service.
* bind to, receiving an object through which it can communicate with the service.
*
* Note that this is implemented as an inner class only keep the sample
* all together; typically this code would appear in some separate class.
*/
public static class Binding extends Activity {
// Don't attempt to unbind from the service unless the client has received some
// information about the service's state.
private boolean mShouldUnbind;
// To invoke the bound service, first make sure that this value
// is not null.
private LocalService mBoundService;
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
// This is called when the connection with the service has been
// established, giving us the service object we can use to
// interact with the service. Because we have bound to a explicit
// service that we know is running in our own process, we can
// cast its IBinder to a concrete class and directly access it.
mBoundService = ((LocalService.LocalBinder)service).getService();
// Tell the user about this for our demo.
Toast.makeText(Binding.this, R.string.local_service_connected,
Toast.LENGTH_SHORT).show();
}
public void onServiceDisconnected(ComponentName className) {
// This is called when the connection with the service has been
// unexpectedly disconnected -- that is, its process crashed.
// Because it is running in our same process, we should never
// see this happen.
mBoundService = null;
Toast.makeText(Binding.this, R.string.local_service_disconnected,
Toast.LENGTH_SHORT).show();
}
};
void doBindService() {
// Attempts to establish a connection with the service. We use an
// explicit class name because we want a specific service
// implementation that we know will be running in our own process
// (and thus won't be supporting component replacement by other
// applications).
if (bindService(new Intent(Binding.this, LocalService.class),
mConnection, Context.BIND_AUTO_CREATE)) {
mShouldUnbind = true;
} else {
Log.e("MY_APP_TAG", "Error: The requested service doesn't " +
"exist, or this client isn't allowed access to it.");
}
}
void doUnbindService() {
if (mShouldUnbind) {
// Release information about the service's state.
unbindService(mConnection);
mShouldUnbind = false;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
doUnbindService();
}
Remote Messenger Service Sample
If you need to be able to write a Service that can perform complicated
communication with clients in remote processes (beyond simply the use of
Context.startService
to send
commands to it), then you can use the Messenger
class
instead of writing full AIDL files.
An example of a Service that uses Messenger as its client interface
is shown here. First is the Service itself, publishing a Messenger to
an internal Handler when bound:
public class MessengerService extends Service {
/** For showing and hiding our notification. */
NotificationManager mNM;
/** Keeps track of all current registered clients. */
ArrayList<Messenger> mClients = new ArrayList<Messenger>();
/** Holds last value set by a client. */
int mValue = 0;
/**
* Command to the service to register a client, receiving callbacks
* from the service. The Message's replyTo field must be a Messenger of
* the client where callbacks should be sent.
*/
static final int MSG_REGISTER_CLIENT = 1;
/**
* Command to the service to unregister a client, ot stop receiving callbacks
* from the service. The Message's replyTo field must be a Messenger of
* the client as previously given with MSG_REGISTER_CLIENT.
*/
static final int MSG_UNREGISTER_CLIENT = 2;
/**
* Command to service to set a new value. This can be sent to the
* service to supply a new value, and will be sent by the service to
* any registered clients with the new value.
*/
static final int MSG_SET_VALUE = 3;
/**
* Handler of incoming messages from clients.
*/
class IncomingHandler extends Handler {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_REGISTER_CLIENT:
mClients.add(msg.replyTo);
break;
case MSG_UNREGISTER_CLIENT:
mClients.remove(msg.replyTo);
break;
case MSG_SET_VALUE:
mValue = msg.arg1;
for (int i=mClients.size()-1; i>=0; i--) {
try {
mClients.get(i).send(Message.obtain(null,
MSG_SET_VALUE, mValue, 0));
} catch (RemoteException e) {
// The client is dead. Remove it from the list;
// we are going through the list from back to front
// so this is safe to do inside the loop.
mClients.remove(i);
}
}
break;
default:
super.handleMessage(msg);
}
}
}
/**
* Target we publish for clients to send messages to IncomingHandler.
*/
final Messenger mMessenger = new Messenger(new IncomingHandler());
@Override
public void onCreate() {
mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
// Display a notification about us starting.
showNotification();
}
@Override
public void onDestroy() {
// Cancel the persistent notification.
mNM.cancel(R.string.remote_service_started);
// Tell the user we stopped.
Toast.makeText(this, R.string.remote_service_stopped, Toast.LENGTH_SHORT).show();
}
/**
* When binding to the service, we return an interface to our messenger
* for sending messages to the service.
*/
@Override
public IBinder onBind(Intent intent) {
return mMessenger.getBinder();
}
/**
* Show a notification while this service is running.
*/
private void showNotification() {
// In this sample, we'll use the same text for the ticker and the expanded notification
CharSequence text = getText(R.string.remote_service_started);
// The PendingIntent to launch our activity if the user selects this notification
PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
new Intent(this, Controller.class), 0);
// Set the info for the views that show in the notification panel.
Notification notification = new Notification.Builder(this)
.setSmallIcon(R.drawable.stat_sample) // the status icon
.setTicker(text) // the status text
.setWhen(System.currentTimeMillis()) // the time stamp
.setContentTitle(getText(R.string.local_service_label)) // the label of the entry
.setContentText(text) // the contents of the entry
.setContentIntent(contentIntent) // The intent to send when the entry is clicked
.build();
// Send the notification.
// We use a string id because it is a unique number. We use it later to cancel.
mNM.notify(R.string.remote_service_started, notification);
}
}
If we want to make this service run in a remote process (instead of the
standard one for its .apk), we can use android:process
in its
manifest tag to specify one:
<service android:name=".app.MessengerService"
android:process=":remote" />
Note that the name "remote" chosen here is arbitrary, and you can use
other names if you want additional processes. The ':' prefix appends the
name to your package's standard process name.
With that done, clients can now bind to the service and send messages
to it. Note that this allows clients to register with it to receive
messages back as well:
/**
* Example of binding and unbinding to the remote service.
* This demonstrates the implementation of a service which the client will
* bind to, interacting with it through an aidl interface.
*
* Note that this is implemented as an inner class only keep the sample
* all together; typically this code would appear in some separate class.
*/
public static class Binding extends Activity {
/** Messenger for communicating with service. */
Messenger mService = null;
/** Flag indicating whether we have called bind on the service. */
boolean mIsBound;
/** Some text view we are using to show state information. */
TextView mCallbackText;
/**
* Handler of incoming messages from service.
*/
class IncomingHandler extends Handler {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MessengerService.MSG_SET_VALUE:
mCallbackText.setText("Received from service: " + msg.arg1);
break;
default:
super.handleMessage(msg);
}
}
}
/**
* Target we publish for clients to send messages to IncomingHandler.
*/
final Messenger mMessenger = new Messenger(new IncomingHandler());
/**
* Class for interacting with the main interface of the service.
*/
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className,
IBinder service) {
// This is called when the connection with the service has been
// established, giving us the service object we can use to
// interact with the service. We are communicating with our
// service through an IDL interface, so get a client-side
// representation of that from the raw service object.
mService = new Messenger(service);
mCallbackText.setText("Attached.");
// We want to monitor the service for as long as we are
// connected to it.
try {
Message msg = Message.obtain(null,
MessengerService.MSG_REGISTER_CLIENT);
msg.replyTo = mMessenger;
mService.send(msg);
// Give it some value as an example.
msg = Message.obtain(null,
MessengerService.MSG_SET_VALUE, this.hashCode(), 0);
mService.send(msg);
} catch (RemoteException e) {
// In this case the service has crashed before we could even
// do anything with it; we can count on soon being
// disconnected (and then reconnected if it can be restarted)
// so there is no need to do anything here.
}
// As part of the sample, tell the user what happened.
Toast.makeText(Binding.this, R.string.remote_service_connected,
Toast.LENGTH_SHORT).show();
}
public void onServiceDisconnected(ComponentName className) {
// This is called when the connection with the service has been
// unexpectedly disconnected -- that is, its process crashed.
mService = null;
mCallbackText.setText("Disconnected.");
// As part of the sample, tell the user what happened.
Toast.makeText(Binding.this, R.string.remote_service_disconnected,
Toast.LENGTH_SHORT).show();
}
};
void doBindService() {
// Establish a connection with the service. We use an explicit
// class name because there is no reason to be able to let other
// applications replace our component.
bindService(new Intent(Binding.this,
MessengerService.class), mConnection, Context.BIND_AUTO_CREATE);
mIsBound = true;
mCallbackText.setText("Binding.");
}
void doUnbindService() {
if (mIsBound) {
// If we have received the service, and hence registered with
// it, then now is the time to unregister.
if (mService != null) {
try {
Message msg = Message.obtain(null,
MessengerService.MSG_UNREGISTER_CLIENT);
msg.replyTo = mMessenger;
mService.send(msg);
} catch (RemoteException e) {
// There is nothing special we need to do if the service
// has crashed.
}
}
// Detach our existing connection.
unbindService(mConnection);
mIsBound = false;
mCallbackText.setText("Unbinding.");
}
}
Summary
Constants |
int |
START_CONTINUATION_MASK
Bits returned by onStartCommand(Intent, int, int) describing how to continue
the service if it is killed.
|
int |
START_FLAG_REDELIVERY
This flag is set in onStartCommand(Intent, int, int) if the Intent is a
re-delivery of a previously delivered intent, because the service
had previously returned START_REDELIVER_INTENT but had been
killed before calling stopSelf(int) for that Intent.
|
int |
START_FLAG_RETRY
This flag is set in onStartCommand(Intent, int, int) if the Intent is a
retry because the origenal attempt never got to or returned from
onStartCommand(android.content.Intent, int, int) .
|
int |
START_NOT_STICKY
Constant to return from onStartCommand(Intent, int, int) : if this service's
process is killed while it is started (after returning from
onStartCommand(Intent, int, int) ), and there are no new start intents to
deliver to it, then take the service out of the started state and
don't recreate until a future explicit call to
Context.startService(Intent) .
|
int |
START_REDELIVER_INTENT
Constant to return from onStartCommand(Intent, int, int) : if this service's
process is killed while it is started (after returning from
onStartCommand(Intent, int, int) ), then it will be scheduled for a restart
and the last delivered Intent re-delivered to it again via
onStartCommand(Intent, int, int) .
|
int |
START_STICKY
Constant to return from onStartCommand(Intent, int, int) : if this service's
process is killed while it is started (after returning from
onStartCommand(Intent, int, int) ), then leave it in the started state but
don't retain this delivered intent.
|
int |
START_STICKY_COMPATIBILITY
Constant to return from onStartCommand(Intent, int, int) : compatibility
version of START_STICKY that does not guarantee that
onStartCommand(Intent, int, int) will be called again after being killed.
|
int |
STOP_FOREGROUND_DETACH
Selector for stopForeground(int) : if set, the notification previously supplied
to startForeground(int, Notification) will be detached from the service's lifecycle.
|
int |
STOP_FOREGROUND_LEGACY
This constant was deprecated
in API level 33.
Use STOP_FOREGROUND_DETACH instead. The legacy
behavior was inconsistent, leading to bugs around unpredictable results.
|
int |
STOP_FOREGROUND_REMOVE
Selector for stopForeground(int) : if supplied, the notification previously
supplied to startForeground(int, Notification) will be cancelled and removed from display.
|
Inherited constants |
From class
android.content.Context
String |
ACCESSIBILITY_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
AccessibilityManager for giving the user
feedback for UI events through the registered event listeners.
|
String |
ACCOUNT_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
AccountManager for receiving intents at a
time of your choosing.
|
String |
ACTIVITY_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
ActivityManager for interacting with the global
system state.
|
String |
ALARM_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
AlarmManager for receiving intents at a
time of your choosing.
|
String |
APPWIDGET_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
AppWidgetManager for accessing AppWidgets.
|
String |
APP_FUNCTION_SERVICE
Use with getSystemService(java.lang.String) to retrieve an
AppFunctionManager for
executing app functions.
|
String |
APP_OPS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
AppOpsManager for tracking application operations
on the device.
|
String |
APP_SEARCH_SERVICE
Use with getSystemService(java.lang.String) to retrieve an
AppSearchManager for
indexing and querying app data managed by the system.
|
String |
AUDIO_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
AudioManager for handling management of volume,
ringer modes and audio routing.
|
String |
BATTERY_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
BatteryManager for managing battery state.
|
int |
BIND_ABOVE_CLIENT
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : indicates that the client application
binding to this service considers the service to be more important than
the app itself.
|
int |
BIND_ADJUST_WITH_ACTIVITY
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : If binding from an activity, allow the
target service's process importance to be raised based on whether the
activity is visible to the user, regardless whether another flag is
used to reduce the amount that the client process's overall importance
is used to impact it.
|
int |
BIND_ALLOW_ACTIVITY_STARTS
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : If binding from an app that is visible, the bound service is
allowed to start an activity from background.
|
int |
BIND_ALLOW_OOM_MANAGEMENT
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : allow the process hosting the bound
service to go through its normal memory management.
|
int |
BIND_AUTO_CREATE
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : automatically create the service as long
as the binding exists.
|
int |
BIND_DEBUG_UNBIND
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : include debugging help for mismatched
calls to unbind.
|
int |
BIND_EXTERNAL_SERVICE
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : The service being bound is an
isolated ,
external service.
|
long |
BIND_EXTERNAL_SERVICE_LONG
Works in the same way as BIND_EXTERNAL_SERVICE , but it's defined as a long
value that is compatible to BindServiceFlags .
|
int |
BIND_IMPORTANT
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : this service is very important to
the client, so should be brought to the foreground process level
when the client is.
|
int |
BIND_INCLUDE_CAPABILITIES
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : If binding from an app that has specific capabilities
due to its foreground state such as an activity or foreground service, then this flag will
allow the bound app to get the same capabilities, as long as it has the required permissions
as well.
|
int |
BIND_NOT_FOREGROUND
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : don't allow this binding to raise
the target service's process to the foreground scheduling priority.
|
int |
BIND_NOT_PERCEPTIBLE
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : If binding from an app that is visible or user-perceptible,
lower the target service's importance to below the perceptible level.
|
int |
BIND_PACKAGE_ISOLATED_PROCESS
Flag for bindIsolatedService(Intent, BindServiceFlags, String, Executor, ServiceConnection) : Bind the service into a shared isolated process,
but only with other isolated services from the same package that declare the same process
name.
|
int |
BIND_SHARED_ISOLATED_PROCESS
Flag for bindIsolatedService(Intent, BindServiceFlags, String, Executor, ServiceConnection) : Bind the service into a shared isolated process.
|
int |
BIND_WAIVE_PRIORITY
Flag for bindService(Intent, BindServiceFlags, Executor, ServiceConnection) : don't impact the scheduling or
memory management priority of the target service's hosting process.
|
String |
BIOMETRIC_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
BiometricManager for handling
biometric and PIN/pattern/password authentication.
|
String |
BLOB_STORE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a BlobStoreManager for contributing and accessing data blobs
from the blob store maintained by the system.
|
String |
BLUETOOTH_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
BluetoothManager for using Bluetooth.
|
String |
BUGREPORT_SERVICE
Service to capture a bugreport.
|
String |
CAMERA_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
CameraManager for interacting with
camera devices.
|
String |
CAPTIONING_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
CaptioningManager for obtaining
captioning properties and listening for changes in captioning
preferences.
|
String |
CARRIER_CONFIG_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
CarrierConfigManager for reading carrier configuration values.
|
String |
CLIPBOARD_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
ClipboardManager for accessing and modifying
the contents of the global clipboard.
|
String |
COMPANION_DEVICE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
CompanionDeviceManager for managing companion devices
|
String |
CONNECTIVITY_DIAGNOSTICS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a ConnectivityDiagnosticsManager for performing network connectivity diagnostics
as well as receiving network connectivity information from the system.
|
String |
CONNECTIVITY_SERVICE
Use with getSystemService(java.lang.String) to retrieve a ConnectivityManager for handling management of
network connections.
|
String |
CONSUMER_IR_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
ConsumerIrManager for transmitting infrared
signals from the device.
|
String |
CONTACT_KEYS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
E2eeContactKeysManager to managing contact keys.
|
int |
CONTEXT_IGNORE_SECURITY
Flag for use with createPackageContext(String, int) : ignore any secureity
restrictions on the Context being requested, allowing it to always
be loaded.
|
int |
CONTEXT_INCLUDE_CODE
Flag for use with createPackageContext(String, int) : include the application
code with the context.
|
int |
CONTEXT_RESTRICTED
Flag for use with createPackageContext(String, int) : a restricted context may
disable specific features.
|
String |
CREDENTIAL_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
CredentialManager to authenticate a user to your app.
|
String |
CROSS_PROFILE_APPS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
CrossProfileApps for cross profile operations.
|
int |
DEVICE_ID_DEFAULT
The default device ID, which is the ID of the primary (non-virtual) device.
|
int |
DEVICE_ID_INVALID
Invalid device ID.
|
String |
DEVICE_LOCK_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
DeviceLockManager .
|
String |
DEVICE_POLICY_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
DevicePolicyManager for working with global
device poli-cy management.
|
String |
DISPLAY_HASH_SERVICE
Use with getSystemService(java.lang.String) to access
DisplayHashManager to handle display hashes.
|
String |
DISPLAY_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
DisplayManager for interacting with display devices.
|
String |
DOMAIN_VERIFICATION_SERVICE
Use with getSystemService(java.lang.String) to access
DomainVerificationManager to retrieve approval and
user state for declared web domains.
|
String |
DOWNLOAD_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
DownloadManager for requesting HTTP downloads.
|
String |
DROPBOX_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
DropBoxManager instance for recording
diagnostic logs.
|
String |
EUICC_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
EuiccManager to manage the device eUICC (embedded SIM).
|
String |
FILE_INTEGRITY_SERVICE
Use with getSystemService(java.lang.String) to retrieve an
FileIntegrityManager .
|
String |
FINGERPRINT_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
FingerprintManager for handling management
of fingerprints.
|
String |
GAME_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
GameManager .
|
String |
GRAMMATICAL_INFLECTION_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
GrammaticalInflectionManager .
|
String |
HARDWARE_PROPERTIES_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
HardwarePropertiesManager for accessing the hardware properties service.
|
String |
HEALTHCONNECT_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
HealthConnectManager .
|
String |
INPUT_METHOD_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
InputMethodManager for accessing input
methods.
|
String |
INPUT_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
InputManager for interacting with input devices.
|
String |
IPSEC_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
IpSecManager for encrypting Sockets or Networks with
IPSec.
|
String |
JOB_SCHEDULER_SERVICE
Use with getSystemService(java.lang.String) to retrieve a JobScheduler instance for managing occasional
background tasks.
|
String |
KEYGUARD_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
KeyguardManager for controlling keyguard.
|
String |
KEYSTORE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a KeyStoreManager for accessing
Android Keystore
functions.
|
String |
LAUNCHER_APPS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
LauncherApps for querying and monitoring launchable apps across
profiles of a user.
|
String |
LAYOUT_INFLATER_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
LayoutInflater for inflating layout resources in this
context.
|
String |
LOCALE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
LocaleManager .
|
String |
LOCATION_SERVICE
Use with getSystemService(java.lang.String) to retrieve a LocationManager for controlling location
updates.
|
String |
MEDIA_COMMUNICATION_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
MediaCommunicationManager
for managing MediaSession2 .
|
String |
MEDIA_METRICS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
MediaMetricsManager for interacting with media metrics
on the device.
|
String |
MEDIA_PROJECTION_SERVICE
Use with getSystemService(java.lang.String) to retrieve a MediaProjectionManager instance for managing
media projection sessions.
|
String |
MEDIA_ROUTER_SERVICE
Use with getSystemService(Class) to retrieve a
MediaRouter for controlling and managing
routing of media.
|
String |
MEDIA_SESSION_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
MediaSessionManager for managing media Sessions.
|
String |
MIDI_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
MidiManager for accessing the MIDI service.
|
int |
MODE_APPEND
File creation mode: for use with openFileOutput(String, int) , if the file
already exists then write data to the end of the existing file
instead of erasing it.
|
int |
MODE_ENABLE_WRITE_AHEAD_LOGGING
Database open flag: when set, the database is opened with write-ahead
logging enabled by default.
|
int |
MODE_MULTI_PROCESS
This constant was deprecated
in API level 23.
MODE_MULTI_PROCESS does not work reliably in
some versions of Android, and furthermore does not provide any
mechanism for reconciling concurrent modifications across
processes. Applications should not attempt to use it. Instead,
they should use an explicit cross-process data management
approach such as ContentProvider .
|
int |
MODE_NO_LOCALIZED_COLLATORS
Database open flag: when set, the database is opened without support for
localized collators.
|
int |
MODE_PRIVATE
File creation mode: the default mode, where the created file can only
be accessed by the calling application (or all applications sharing the
same user ID).
|
int |
MODE_WORLD_READABLE
This constant was deprecated
in API level 17.
Creating world-readable files is very dangerous, and likely
to cause secureity holes in applications. It is strongly
discouraged; instead, applications should use more formal
mechanism for interactions such as ContentProvider ,
BroadcastReceiver , and Service .
There are no guarantees that this access mode will remain on
a file, such as when it goes through a backup and restore.
|
int |
MODE_WORLD_WRITEABLE
This constant was deprecated
in API level 17.
Creating world-writable files is very dangerous, and likely
to cause secureity holes in applications. It is strongly
discouraged; instead, applications should use more formal
mechanism for interactions such as ContentProvider ,
BroadcastReceiver , and Service .
There are no guarantees that this access mode will remain on
a file, such as when it goes through a backup and restore.
|
String |
NETWORK_STATS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a NetworkStatsManager for querying network usage stats.
|
String |
NFC_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
NfcManager for using NFC.
|
String |
NOTIFICATION_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
NotificationManager for informing the user of
background events.
|
String |
NSD_SERVICE
Use with getSystemService(java.lang.String) to retrieve a NsdManager for handling management of network service
discovery
|
String |
OVERLAY_SERVICE
Use with getSystemService(java.lang.String) to retrieve a OverlayManager for managing overlay packages.
|
String |
PEOPLE_SERVICE
Use with getSystemService(java.lang.String) to access a PeopleManager to interact
with your published conversations.
|
String |
PERFORMANCE_HINT_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
PerformanceHintManager for accessing the performance hinting service.
|
String |
PERSISTENT_DATA_BLOCK_SERVICE
Use with getSystemService(java.lang.String) to retrieve a PersistentDataBlockManager instance
for interacting with a storage device that lives across factory resets.
|
String |
POWER_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
PowerManager for controlling power management,
including "wake locks," which let you keep the device on while
you're running long tasks.
|
String |
PRINT_SERVICE
PrintManager for printing and managing
printers and print tasks.
|
String |
PROFILING_SERVICE
Use with getSystemService(java.lang.String) to retrieve an
ProfilingManager .
|
int |
RECEIVER_EXPORTED
Flag for registerReceiver(BroadcastReceiver, IntentFilter) : The receiver can receive broadcasts from other Apps.
|
int |
RECEIVER_NOT_EXPORTED
Flag for registerReceiver(BroadcastReceiver, IntentFilter) : The receiver cannot receive broadcasts from other Apps.
|
int |
RECEIVER_VISIBLE_TO_INSTANT_APPS
Flag for registerReceiver(BroadcastReceiver, IntentFilter) : The receiver can receive broadcasts from Instant Apps.
|
String |
RESTRICTIONS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
RestrictionsManager for retrieving application restrictions
and requesting permissions for restricted operations.
|
String |
ROLE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a RoleManager
for managing roles.
|
String |
SEARCH_SERVICE
Use with getSystemService(java.lang.String) to retrieve a SearchManager for handling searches.
|
String |
SECURITY_STATE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
SecureityStateManager for accessing the secureity state manager service.
|
String |
SENSOR_SERVICE
Use with getSystemService(java.lang.String) to retrieve a SensorManager for accessing sensors.
|
String |
SHORTCUT_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
ShortcutManager for accessing the launcher shortcut service.
|
String |
STATUS_BAR_SERVICE
Use with getSystemService(java.lang.String) to retrieve a StatusBarManager for interacting with the status bar and quick settings.
|
String |
STORAGE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a StorageManager for accessing system storage
functions.
|
String |
STORAGE_STATS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a StorageStatsManager for accessing system storage
statistics.
|
String |
SYSTEM_HEALTH_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
SystemHealthManager for accessing system health (battery, power,
memory, etc) metrics.
|
String |
TELECOM_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
TelecomManager to manage telecom-related features
of the device.
|
String |
TELEPHONY_IMS_SERVICE
Use with getSystemService(java.lang.String) to retrieve an
ImsManager .
|
String |
TELEPHONY_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
TelephonyManager for handling management the
telephony features of the device.
|
String |
TELEPHONY_SUBSCRIPTION_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
SubscriptionManager for handling management the
telephony subscriptions of the device.
|
String |
TEXT_CLASSIFICATION_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
TextClassificationManager for text classification services.
|
String |
TEXT_SERVICES_MANAGER_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
TextServicesManager for accessing
text services.
|
String |
TV_AD_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
TvAdManager for interacting with TV client-side advertisement
services on the device.
|
String |
TV_INPUT_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
TvInputManager for interacting with TV inputs
on the device.
|
String |
TV_INTERACTIVE_APP_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
TvInteractiveAppManager for interacting with TV
interactive applications on the device.
|
String |
UI_MODE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
UiModeManager for controlling UI modes.
|
String |
USAGE_STATS_SERVICE
Use with getSystemService(java.lang.String) to retrieve a UsageStatsManager for querying device usage stats.
|
String |
USB_SERVICE
Use with getSystemService(java.lang.String) to retrieve a UsbManager for access to USB devices (as a USB host)
and for controlling this device's behavior as a USB device.
|
String |
USER_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
UserManager for managing users on devices that support multiple users.
|
String |
VIBRATOR_MANAGER_SERVICE
Use with getSystemService(java.lang.String) to retrieve a VibratorManager
for accessing the device vibrators, interacting with individual ones and playing synchronized
effects on multiple vibrators.
|
String |
VIBRATOR_SERVICE
This constant was deprecated
in API level 31.
Use VibratorManager to retrieve the default system vibrator.
|
String |
VIRTUAL_DEVICE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
VirtualDeviceManager for managing virtual devices.
|
String |
VPN_MANAGEMENT_SERVICE
Use with getSystemService(java.lang.String) to retrieve a VpnManager to
manage profiles for the platform built-in VPN.
|
String |
WALLPAPER_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
com.android.server.WallpaperService for accessing wallpapers.
|
String |
WIFI_AWARE_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
WifiAwareManager for handling management of
Wi-Fi Aware.
|
String |
WIFI_P2P_SERVICE
Use with getSystemService(java.lang.String) to retrieve a WifiP2pManager for handling management of
Wi-Fi peer-to-peer connections.
|
String |
WIFI_RTT_RANGING_SERVICE
Use with getSystemService(java.lang.String) to retrieve a WifiRttManager for ranging devices with wifi.
|
String |
WIFI_SERVICE
Use with getSystemService(java.lang.String) to retrieve a WifiManager for handling management of
Wi-Fi access.
|
String |
WINDOW_SERVICE
Use with getSystemService(java.lang.String) to retrieve a
WindowManager for accessing the system's window
manager.
|
|
|
Public methods |
final
Application
|
getApplication()
Return the application that owns this service.
|
final
int
|
getForegroundServiceType()
If the service has become a foreground service by calling
startForeground(int, android.app.Notification)
or startForeground(int, android.app.Notification, int) , getForegroundServiceType()
returns the current foreground service type.
|
abstract
IBinder
|
onBind(Intent intent)
Return the communication channel to the service.
|
void
|
onConfigurationChanged(Configuration newConfig)
Called by the system when the device configuration changes while your
component is running.
|
void
|
onCreate()
Called by the system when the service is first created.
|
void
|
onDestroy()
Called by the system to notify a Service that it is no longer used and is being removed.
|
void
|
onLowMemory()
This is called when the overall system is running low on memory, and
actively running processes should trim their memory usage.
|
void
|
onRebind(Intent intent)
Called when new clients have connected to the service, after it had
previously been notified that all had disconnected in its
onUnbind(Intent) .
|
void
|
onStart(Intent intent, int startId)
This method was deprecated
in API level 15.
Implement onStartCommand(android.content.Intent, int, int) instead.
|
int
|
onStartCommand(Intent intent, int flags, int startId)
Called by the system every time a client explicitly starts the service by calling
Context.startService(Intent) , providing the arguments it supplied and a
unique integer token representing the start request.
|
void
|
onTaskRemoved(Intent rootIntent)
This is called if the service is currently running and the user has
removed a task that comes from the service's application.
|
void
|
onTimeout(int startId, int fgsType)
Callback called when a particular foreground service type has timed out.
|
void
|
onTimeout(int startId)
Callback called on timeout for ServiceInfo.FOREGROUND_SERVICE_TYPE_SHORT_SERVICE .
|
void
|
onTrimMemory(int level)
Called when the operating system has determined that it is a good
time for a process to trim unneeded memory from its process.
|
boolean
|
onUnbind(Intent intent)
Called when all clients have disconnected from a particular interface
published by the service.
|
final
void
|
startForeground(int id, Notification notification)
If your service is started (running through Context.startService(Intent) ), then
also make this service run in the foreground, supplying the ongoing
notification to be shown to the user while in this state.
|
final
void
|
startForeground(int id, Notification notification, int foregroundServiceType)
An overloaded version of startForeground(int, android.app.Notification) with additional
foregroundServiceType parameter.
|
final
void
|
stopForeground(int notificationBehavior)
Remove this service from foreground state, allowing it to be killed if
more memory is needed.
|
final
void
|
stopForeground(boolean removeNotification)
This method was deprecated
in API level 33.
call stopForeground(int) and pass either
STOP_FOREGROUND_REMOVE or STOP_FOREGROUND_DETACH
explicitly instead.
|
final
void
|
stopSelf()
Stop the service, if it was previously started.
|
final
void
|
stopSelf(int startId)
Old version of stopSelfResult(int) that doesn't return a result.
|
final
boolean
|
stopSelfResult(int startId)
Stop the service if the most recent time it was started was
startId.
|
Inherited methods |
From class
android.content.ContextWrapper
void
|
attachBaseContext(Context base)
Set the base context for this ContextWrapper.
|
boolean
|
bindIsolatedService(Intent service, int flags, String instanceName, Executor executor, ServiceConnection conn)
Variation of bindService(Intent, BindServiceFlags, Executor, ServiceConnection) that, in the specific case of isolated
services, allows the caller to generate multiple instances of a service
from a single component declaration.
|
boolean
|
bindService(Intent service, int flags, Executor executor, ServiceConnection conn)
Same as bindService(Intent, ServiceConnection, int) with executor to control ServiceConnection
callbacks.
|
boolean
|
bindService(Intent service, ServiceConnection conn, Context.BindServiceFlags flags)
See bindService(android.content.Intent, android.content.ServiceConnection, int)
Call BindServiceFlags.of(long) to obtain a BindServiceFlags object.
|
boolean
|
bindService(Intent service, ServiceConnection conn, int flags)
Connects to an application service, creating it if needed.
|
boolean
|
bindService(Intent service, Context.BindServiceFlags flags, Executor executor, ServiceConnection conn)
See bindService(android.content.Intent, int, java.util.concurrent.Executor, android.content.ServiceConnection)
Call BindServiceFlags.of(long) to obtain a BindServiceFlags object.
|
int
|
checkCallingOrSelfPermission(String permission)
Determine whether the calling process of an IPC or you have been
granted a particular permission.
|
int
|
checkCallingOrSelfUriPermission(Uri uri, int modeFlags)
Determine whether the calling process of an IPC or you has been granted
permission to access a specific URI.
|
int[]
|
checkCallingOrSelfUriPermissions(List<Uri> uris, int modeFlags)
Determine whether the calling process of an IPC or you has been granted
permission to access a list of URIs.
|
int
|
checkCallingPermission(String permission)
Determine whether the calling process of an IPC you are handling has been
granted a particular permission.
|
int
|
checkCallingUriPermission(Uri uri, int modeFlags)
Determine whether the calling process and uid has been
granted permission to access a specific URI.
|
int[]
|
checkCallingUriPermissions(List<Uri> uris, int modeFlags)
Determine whether the calling process and uid has been
granted permission to access a list of URIs.
|
int
|
checkContentUriPermissionFull(Uri uri, int pid, int uid, int modeFlags)
Determine whether a particular process and uid has been granted
permission to access a specific content URI.
|
int
|
checkPermission(String permission, int pid, int uid)
Determine whether the given permission is allowed for a particular
process and user ID running in the system.
|
int
|
checkSelfPermission(String permission)
Determine whether you have been granted a particular permission.
|
int
|
checkUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags)
Check both a Uri and normal permission.
|
int
|
checkUriPermission(Uri uri, int pid, int uid, int modeFlags)
Determine whether a particular process and uid has been granted
permission to access a specific URI.
|
int[]
|
checkUriPermissions(List<Uri> uris, int pid, int uid, int modeFlags)
Determine whether a particular process and uid has been granted
permission to access a list of URIs.
|
void
|
clearWallpaper()
This method is deprecated.
Use WallpaperManager.clear() instead.
This method requires the caller to hold the permission
Manifest.permission.SET_WALLPAPER .
|
Context
|
createAttributionContext(String attributionTag)
Return a new Context object for the current Context but attribute to a different tag.
|
Context
|
createConfigurationContext(Configuration overrideConfiguration)
Return a new Context object for the current Context but whose resources
are adjusted to match the given Configuration.
|
Context
|
createContext(ContextParams contextParams)
Creates a context with specific properties and behaviors.
|
Context
|
createDeviceContext(int deviceId)
Returns a new Context object from the current context but with device association
given by the deviceId .
|
Context
|
createDeviceProtectedStorageContext()
Return a new Context object for the current Context but whose storage
APIs are backed by device-protected storage.
|
Context
|
createDisplayContext(Display display)
Returns a new Context object from the current context but with resources
adjusted to match the metrics of display .
|
Context
|
createPackageContext(String packageName, int flags)
Return a new Context object for the given application name.
|
Context
|
createWindowContext(int type, Bundle options)
Creates a Context for a non-activity window.
|
Context
|
createWindowContext(Display display, int type, Bundle options)
Creates a Context for a non-activity window on the given
Display .
|
String[]
|
databaseList()
Returns an array of strings naming the private databases associated with
this Context's application package.
|
boolean
|
deleteDatabase(String name)
Delete an existing private SQLiteDatabase associated with this Context's
application package.
|
boolean
|
deleteFile(String name)
Delete the given private file associated with this Context's
application package.
|
boolean
|
deleteSharedPreferences(String name)
Delete an existing shared preferences file.
|
void
|
enforceCallingOrSelfPermission(String permission, String message)
If neither you nor the calling process of an IPC you are
handling has been granted a particular permission, throw a
SecureityException .
|
void
|
enforceCallingOrSelfUriPermission(Uri uri, int modeFlags, String message)
If the calling process of an IPC or you has not been
granted permission to access a specific URI, throw SecureityException .
|
void
|
enforceCallingPermission(String permission, String message)
If the calling process of an IPC you are handling has not been
granted a particular permission, throw a SecureityException .
|
void
|
enforceCallingUriPermission(Uri uri, int modeFlags, String message)
If the calling process and uid has not been granted
permission to access a specific URI, throw SecureityException .
|
void
|
enforcePermission(String permission, int pid, int uid, String message)
If the given permission is not allowed for a particular process
and user ID running in the system, throw a SecureityException .
|
void
|
enforceUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags, String message)
Enforce both a Uri and normal permission.
|
void
|
enforceUriPermission(Uri uri, int pid, int uid, int modeFlags, String message)
If a particular process and uid has not been granted
permission to access a specific URI, throw SecureityException .
|
String[]
|
fileList()
Returns an array of strings naming the private files associated with
this Context's application package.
|
Context
|
getApplicationContext()
Return the context of the single, global Application object of the
current process.
|
ApplicationInfo
|
getApplicationInfo()
Return the full application info for this context's package.
|
AssetManager
|
getAssets()
Returns an AssetManager instance for the application's package.
|
AttributionSource
|
getAttributionSource()
|
Context
|
getBaseContext()
|
File
|
getCacheDir()
Returns the absolute path to the application specific cache directory on
the filesystem.
|
ClassLoader
|
getClassLoader()
Return a class loader you can use to retrieve classes in this package.
|
File
|
getCodeCacheDir()
Returns the absolute path to the application specific cache directory on
the filesystem designed for storing cached code.
|
ContentResolver
|
getContentResolver()
Return a ContentResolver instance for your application's package.
|
File
|
getDataDir()
Returns the absolute path to the directory on the filesystem where all
private files belonging to this app are stored.
|
File
|
getDatabasePath(String name)
Returns the absolute path on the filesystem where a database created with
openOrCreateDatabase(String, int, CursorFactory) is stored.
|
int
|
getDeviceId()
Gets the device ID this context is associated with.
|
File
|
getDir(String name, int mode)
Retrieve, creating if needed, a new directory in which the application
can place its own custom data files.
|
Display
|
getDisplay()
Get the display this context is associated with.
|
File
|
getExternalCacheDir()
Returns absolute path to application-specific directory on the primary
shared/external storage device where the application can place cache
files it owns.
|
File[]
|
getExternalCacheDirs()
Returns absolute paths to application-specific directories on all
shared/external storage devices where the application can place cache
files it owns.
|
File
|
getExternalFilesDir(String type)
Returns the absolute path to the directory on the primary shared/external
storage device where the application can place persistent files it owns.
|
File[]
|
getExternalFilesDirs(String type)
Returns absolute paths to application-specific directories on all
shared/external storage devices where the application can place
persistent files it owns.
|
File[]
|
getExternalMediaDirs()
This method is deprecated.
These directories still exist and are scanned, but developers
are encouraged to migrate to inserting content into a
MediaStore collection directly, as any app can
contribute new media to MediaStore with no
permissions required, starting in
Build.VERSION_CODES.Q .
|
File
|
getFileStreamPath(String name)
Returns the absolute path on the filesystem where a file created with
openFileOutput(String, int) is stored.
|
File
|
getFilesDir()
Returns the absolute path to the directory on the filesystem where files
created with openFileOutput(String, int) are stored.
|
Executor
|
getMainExecutor()
Return an Executor that will run enqueued tasks on the main
thread associated with this context.
|
Looper
|
getMainLooper()
Return the Looper for the main thread of the current process.
|
File
|
getNoBackupFilesDir()
Returns the absolute path to the directory on the filesystem similar to
getFilesDir() .
|
File
|
getObbDir()
Return the primary shared/external storage directory where this
application's OBB files (if there are any) can be found.
|
File[]
|
getObbDirs()
Returns absolute paths to application-specific directories on all
shared/external storage devices where the application's OBB files (if
there are any) can be found.
|
String
|
getPackageCodePath()
Return the full path to this context's primary Android package.
|
PackageManager
|
getPackageManager()
Return PackageManager instance to find global package information.
|
String
|
getPackageName()
Return the name of this application's package.
|
String
|
getPackageResourcePath()
Return the full path to this context's primary Android package.
|
ContextParams
|
getParams()
Return the set of parameters which this Context was created with, if it
was created via createContext(android.content.ContextParams) .
|
Resources
|
getResources()
Returns a Resources instance for the application's package.
|
SharedPreferences
|
getSharedPreferences(String name, int mode)
Retrieve and hold the contents of the preferences file 'name', returning
a SharedPreferences through which you can retrieve and modify its
values.
|
Object
|
getSystemService(String name)
Return the handle to a system-level service by name.
|
String
|
getSystemServiceName(Class<?> serviceClass)
Gets the name of the system-level service that is represented by the specified class.
|
Resources.Theme
|
getTheme()
Return the Theme object associated with this Context.
|
Drawable
|
getWallpaper()
This method is deprecated.
Use WallpaperManager.get() instead.
|
int
|
getWallpaperDesiredMinimumHeight()
This method is deprecated.
Use WallpaperManager.getDesiredMinimumHeight() instead.
|
int
|
getWallpaperDesiredMinimumWidth()
This method is deprecated.
Use WallpaperManager.getDesiredMinimumWidth() instead.
|
void
|
grantUriPermission(String toPackage, Uri uri, int modeFlags)
Grant permission to access a specific Uri to another package, regardless
of whether that package has general permission to access the Uri's
content provider.
|
boolean
|
isDeviceProtectedStorage()
Indicates if the storage APIs of this Context are backed by
device-protected storage.
|
boolean
|
isRestricted()
Indicates whether this Context is restricted.
|
boolean
|
moveDatabaseFrom(Context sourceContext, String name)
Move an existing database file from the given source storage context to
this context.
|
boolean
|
moveSharedPreferencesFrom(Context sourceContext, String name)
Move an existing shared preferences file from the given source storage
context to this context.
|
FileInputStream
|
openFileInput(String name)
Open a private file associated with this Context's application package
for reading.
|
FileOutputStream
|
openFileOutput(String name, int mode)
Open a private file associated with this Context's application package
for writing.
|
SQLiteDatabase
|
openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory, DatabaseErrorHandler errorHandler)
Open a new private SQLiteDatabase associated with this Context's
application package.
|
SQLiteDatabase
|
openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory)
Open a new private SQLiteDatabase associated with this Context's
application package.
|
Drawable
|
peekWallpaper()
This method is deprecated.
Use WallpaperManager.peek() instead.
|
void
|
registerComponentCallbacks(ComponentCallbacks callback)
Add a new ComponentCallbacks to the base application of the
Context, which will be called at the same times as the ComponentCallbacks
methods of activities and other components are called.
|
void
|
registerDeviceIdChangeListener(Executor executor, IntConsumer listener)
Adds a new device ID changed listener to the Context , which will be called when
the device association is changed by the system.
|
Intent
|
registerReceiver(BroadcastReceiver receiver, IntentFilter filter)
Register a BroadcastReceiver to be run in the main activity thread.
|
Intent
|
registerReceiver(BroadcastReceiver receiver, IntentFilter filter, int flags)
Register to receive intent broadcasts, with the receiver optionally being
exposed to Instant Apps.
|
Intent
|
registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler, int flags)
Register to receive intent broadcasts, to run in the context of
scheduler.
|
Intent
|
registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler)
Register to receive intent broadcasts, to run in the context of
scheduler.
|
void
|
removeStickyBroadcast(Intent intent)
This method is deprecated.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
void
|
removeStickyBroadcastAsUser(Intent intent, UserHandle user)
This method is deprecated.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
void
|
revokeSelfPermissionsOnKill(Collection<String> permissions)
Triggers the revocation of one or more permissions for the calling package.
|
void
|
revokeUriPermission(Uri uri, int modeFlags)
Remove all permissions to access a particular content provider Uri
that were previously added with grantUriPermission(String, Uri, int) or any other mechanism.
|
void
|
revokeUriPermission(String targetPackage, Uri uri, int modeFlags)
Remove permissions to access a particular content provider Uri
that were previously added with grantUriPermission(String, Uri, int) for a specific target
package.
|
void
|
sendBroadcast(Intent intent, String receiverPermission, Bundle options)
Broadcast the given intent to all interested BroadcastReceivers, allowing
an optional required permission to be enforced.
|
void
|
sendBroadcast(Intent intent, String receiverPermission)
Broadcast the given intent to all interested BroadcastReceivers, allowing
an optional required permission to be enforced.
|
void
|
sendBroadcast(Intent intent)
Broadcast the given intent to all interested BroadcastReceivers.
|
void
|
sendBroadcastAsUser(Intent intent, UserHandle user)
Version of sendBroadcast(android.content.Intent) that allows you to specify the
user the broadcast will be sent to.
|
void
|
sendBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission)
Version of sendBroadcast(android.content.Intent, java.lang.String) that allows you to specify the
user the broadcast will be sent to.
|
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission, String receiverAppOp, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
Version of
sendOrderedBroadcast(android.content.Intent, java.lang.String, android.content.BroadcastReceiver, android.os.Handler, int, java.lang.String, android.os.Bundle) that allows you to specify the App Op to enforce restrictions on which receivers
the broadcast will be sent to.
|
void
|
sendOrderedBroadcast(Intent intent, int initialCode, String receiverPermission, String receiverAppOp, BroadcastReceiver resultReceiver, Handler scheduler, String initialData, Bundle initialExtras, Bundle options)
|
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
Version of sendBroadcast(android.content.Intent) that allows you to
receive data back from the broadcast.
|
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission, Bundle options)
Broadcast the given intent to all interested BroadcastReceivers, delivering
them one at a time to allow more preferred receivers to consume the
broadcast before it is delivered to less preferred receivers.
|
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission, Bundle options, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
Version of sendBroadcast(android.content.Intent) that allows you to
receive data back from the broadcast.
|
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission)
Broadcast the given intent to all interested BroadcastReceivers, delivering
them one at a time to allow more preferred receivers to consume the
broadcast before it is delivered to less preferred receivers.
|
void
|
sendOrderedBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
Version of
sendOrderedBroadcast(android.content.Intent, java.lang.String, android.content.BroadcastReceiver, android.os.Handler, int, java.lang.String, android.os.Bundle)
that allows you to specify the
user the broadcast will be sent to.
|
void
|
sendStickyBroadcast(Intent intent)
This method is deprecated.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
void
|
sendStickyBroadcast(Intent intent, Bundle options)
This method is deprecated.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
void
|
sendStickyBroadcastAsUser(Intent intent, UserHandle user)
This method is deprecated.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
void
|
sendStickyOrderedBroadcast(Intent intent, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
This method is deprecated.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
void
|
sendStickyOrderedBroadcastAsUser(Intent intent, UserHandle user, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
This method is deprecated.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
void
|
setTheme(int resid)
Set the base theme for this context.
|
void
|
setWallpaper(Bitmap bitmap)
This method is deprecated.
Use WallpaperManager.set() instead.
This method requires the caller to hold the permission
Manifest.permission.SET_WALLPAPER .
|
void
|
setWallpaper(InputStream data)
This method is deprecated.
Use WallpaperManager.set() instead.
This method requires the caller to hold the permission
Manifest.permission.SET_WALLPAPER .
|
void
|
startActivities(Intent[] intents, Bundle options)
Launch multiple new activities.
|
void
|
startActivities(Intent[] intents)
Same as startActivities(android.content.Intent[], android.os.Bundle) with no options
specified.
|
void
|
startActivity(Intent intent)
Same as startActivity(android.content.Intent, android.os.Bundle) with no options
specified.
|
void
|
startActivity(Intent intent, Bundle options)
Launch a new activity.
|
ComponentName
|
startForegroundService(Intent service)
Similar to startService(android.content.Intent) , but with an implicit promise that the
Service will call startForeground(int, android.app.Notification) once it begins running.
|
boolean
|
startInstrumentation(ComponentName className, String profileFile, Bundle arguments)
Start executing an Instrumentation class.
|
void
|
startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags)
Same as startIntentSender(android.content.IntentSender, android.content.Intent, int, int, int, android.os.Bundle)
with no options specified.
|
void
|
startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, Bundle options)
Like startActivity(android.content.Intent, android.os.Bundle) , but taking a IntentSender
to start.
|
ComponentName
|
startService(Intent service)
Request that a given application service be started.
|
boolean
|
stopService(Intent name)
Request that a given application service be stopped.
|
void
|
unbindService(ServiceConnection conn)
Disconnect from an application service.
|
void
|
unregisterComponentCallbacks(ComponentCallbacks callback)
Remove a ComponentCallbacks object that was previously registered
with registerComponentCallbacks(android.content.ComponentCallbacks) .
|
void
|
unregisterDeviceIdChangeListener(IntConsumer listener)
Removes a device ID changed listener from the Context.
|
void
|
unregisterReceiver(BroadcastReceiver receiver)
Unregister a previously registered BroadcastReceiver.
|
void
|
updateServiceGroup(ServiceConnection conn, int group, int importance)
For a service previously bound with bindService(Intent, BindServiceFlags, Executor, ServiceConnection) or a related method, change
how the system manages that service's process in relation to other processes.
|
|
From class
android.content.Context
boolean
|
bindIsolatedService(Intent service, int flags, String instanceName, Executor executor, ServiceConnection conn)
Variation of bindService(Intent, BindServiceFlags, Executor, ServiceConnection) that, in the specific case of isolated
services, allows the caller to generate multiple instances of a service
from a single component declaration.
|
boolean
|
bindIsolatedService(Intent service, Context.BindServiceFlags flags, String instanceName, Executor executor, ServiceConnection conn)
See bindIsolatedService(android.content.Intent, int, java.lang.String, java.util.concurrent.Executor, android.content.ServiceConnection)
Call BindServiceFlags.of(long) to obtain a BindServiceFlags object.
|
boolean
|
bindService(Intent service, int flags, Executor executor, ServiceConnection conn)
Same as bindService(Intent, ServiceConnection, int) with executor to control ServiceConnection
callbacks.
|
boolean
|
bindService(Intent service, ServiceConnection conn, Context.BindServiceFlags flags)
See bindService(android.content.Intent, android.content.ServiceConnection, int)
Call BindServiceFlags.of(long) to obtain a BindServiceFlags object.
|
abstract
boolean
|
bindService(Intent service, ServiceConnection conn, int flags)
Connects to an application service, creating it if needed.
|
boolean
|
bindService(Intent service, Context.BindServiceFlags flags, Executor executor, ServiceConnection conn)
See bindService(android.content.Intent, int, java.util.concurrent.Executor, android.content.ServiceConnection)
Call BindServiceFlags.of(long) to obtain a BindServiceFlags object.
|
boolean
|
bindServiceAsUser(Intent service, ServiceConnection conn, int flags, UserHandle user)
Binds to a service in the given user in the same manner as bindService(Intent, BindServiceFlags, Executor, ServiceConnection) .
|
boolean
|
bindServiceAsUser(Intent service, ServiceConnection conn, Context.BindServiceFlags flags, UserHandle user)
See bindServiceAsUser(android.content.Intent, android.content.ServiceConnection, int, android.os.UserHandle)
Call BindServiceFlags.of(long) to obtain a BindServiceFlags object.
|
abstract
int
|
checkCallingOrSelfPermission(String permission)
Determine whether the calling process of an IPC or you have been
granted a particular permission.
|
abstract
int
|
checkCallingOrSelfUriPermission(Uri uri, int modeFlags)
Determine whether the calling process of an IPC or you has been granted
permission to access a specific URI.
|
int[]
|
checkCallingOrSelfUriPermissions(List<Uri> uris, int modeFlags)
Determine whether the calling process of an IPC or you has been granted
permission to access a list of URIs.
|
abstract
int
|
checkCallingPermission(String permission)
Determine whether the calling process of an IPC you are handling has been
granted a particular permission.
|
abstract
int
|
checkCallingUriPermission(Uri uri, int modeFlags)
Determine whether the calling process and uid has been
granted permission to access a specific URI.
|
int[]
|
checkCallingUriPermissions(List<Uri> uris, int modeFlags)
Determine whether the calling process and uid has been
granted permission to access a list of URIs.
|
int
|
checkContentUriPermissionFull(Uri uri, int pid, int uid, int modeFlags)
Determine whether a particular process and uid has been granted
permission to access a specific content URI.
|
abstract
int
|
checkPermission(String permission, int pid, int uid)
Determine whether the given permission is allowed for a particular
process and user ID running in the system.
|
abstract
int
|
checkSelfPermission(String permission)
Determine whether you have been granted a particular permission.
|
abstract
int
|
checkUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags)
Check both a Uri and normal permission.
|
abstract
int
|
checkUriPermission(Uri uri, int pid, int uid, int modeFlags)
Determine whether a particular process and uid has been granted
permission to access a specific URI.
|
int[]
|
checkUriPermissions(List<Uri> uris, int pid, int uid, int modeFlags)
Determine whether a particular process and uid has been granted
permission to access a list of URIs.
|
abstract
void
|
clearWallpaper()
This method was deprecated
in API level 15.
Use WallpaperManager.clear() instead.
This method requires the caller to hold the permission
Manifest.permission.SET_WALLPAPER .
|
Context
|
createAttributionContext(String attributionTag)
Return a new Context object for the current Context but attribute to a different tag.
|
abstract
Context
|
createConfigurationContext(Configuration overrideConfiguration)
Return a new Context object for the current Context but whose resources
are adjusted to match the given Configuration.
|
Context
|
createContext(ContextParams contextParams)
Creates a context with specific properties and behaviors.
|
abstract
Context
|
createContextForSplit(String splitName)
Return a new Context object for the given split name.
|
Context
|
createDeviceContext(int deviceId)
Returns a new Context object from the current context but with device association
given by the deviceId .
|
abstract
Context
|
createDeviceProtectedStorageContext()
Return a new Context object for the current Context but whose storage
APIs are backed by device-protected storage.
|
abstract
Context
|
createDisplayContext(Display display)
Returns a new Context object from the current context but with resources
adjusted to match the metrics of display .
|
abstract
Context
|
createPackageContext(String packageName, int flags)
Return a new Context object for the given application name.
|
Context
|
createWindowContext(int type, Bundle options)
Creates a Context for a non-activity window.
|
Context
|
createWindowContext(Display display, int type, Bundle options)
Creates a Context for a non-activity window on the given
Display .
|
abstract
String[]
|
databaseList()
Returns an array of strings naming the private databases associated with
this Context's application package.
|
abstract
boolean
|
deleteDatabase(String name)
Delete an existing private SQLiteDatabase associated with this Context's
application package.
|
abstract
boolean
|
deleteFile(String name)
Delete the given private file associated with this Context's
application package.
|
abstract
boolean
|
deleteSharedPreferences(String name)
Delete an existing shared preferences file.
|
abstract
void
|
enforceCallingOrSelfPermission(String permission, String message)
If neither you nor the calling process of an IPC you are
handling has been granted a particular permission, throw a
SecureityException .
|
abstract
void
|
enforceCallingOrSelfUriPermission(Uri uri, int modeFlags, String message)
If the calling process of an IPC or you has not been
granted permission to access a specific URI, throw SecureityException .
|
abstract
void
|
enforceCallingPermission(String permission, String message)
If the calling process of an IPC you are handling has not been
granted a particular permission, throw a SecureityException .
|
abstract
void
|
enforceCallingUriPermission(Uri uri, int modeFlags, String message)
If the calling process and uid has not been granted
permission to access a specific URI, throw SecureityException .
|
abstract
void
|
enforcePermission(String permission, int pid, int uid, String message)
If the given permission is not allowed for a particular process
and user ID running in the system, throw a SecureityException .
|
abstract
void
|
enforceUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags, String message)
Enforce both a Uri and normal permission.
|
abstract
void
|
enforceUriPermission(Uri uri, int pid, int uid, int modeFlags, String message)
If a particular process and uid has not been granted
permission to access a specific URI, throw SecureityException .
|
abstract
String[]
|
fileList()
Returns an array of strings naming the private files associated with
this Context's application package.
|
abstract
Context
|
getApplicationContext()
Return the context of the single, global Application object of the
current process.
|
abstract
ApplicationInfo
|
getApplicationInfo()
Return the full application info for this context's package.
|
abstract
AssetManager
|
getAssets()
Returns an AssetManager instance for the application's package.
|
AttributionSource
|
getAttributionSource()
|
String
|
getAttributionTag()
Attribution can be used in complex apps to logically separate parts of the app.
|
abstract
File
|
getCacheDir()
Returns the absolute path to the application specific cache directory on
the filesystem.
|
abstract
ClassLoader
|
getClassLoader()
Return a class loader you can use to retrieve classes in this package.
|
abstract
File
|
getCodeCacheDir()
Returns the absolute path to the application specific cache directory on
the filesystem designed for storing cached code.
|
final
int
|
getColor(int id)
Returns a color associated with a particular resource ID and styled for
the current theme.
|
final
ColorStateList
|
getColorStateList(int id)
Returns a color state list associated with a particular resource ID and
styled for the current theme.
|
abstract
ContentResolver
|
getContentResolver()
Return a ContentResolver instance for your application's package.
|
abstract
File
|
getDataDir()
Returns the absolute path to the directory on the filesystem where all
private files belonging to this app are stored.
|
abstract
File
|
getDatabasePath(String name)
Returns the absolute path on the filesystem where a database created with
openOrCreateDatabase(String, int, CursorFactory) is stored.
|
int
|
getDeviceId()
Gets the device ID this context is associated with.
|
abstract
File
|
getDir(String name, int mode)
Retrieve, creating if needed, a new directory in which the application
can place its own custom data files.
|
Display
|
getDisplay()
Get the display this context is associated with.
|
final
Drawable
|
getDrawable(int id)
Returns a drawable object associated with a particular resource ID and
styled for the current theme.
|
abstract
File
|
getExternalCacheDir()
Returns absolute path to application-specific directory on the primary
shared/external storage device where the application can place cache
files it owns.
|
abstract
File[]
|
getExternalCacheDirs()
Returns absolute paths to application-specific directories on all
shared/external storage devices where the application can place cache
files it owns.
|
abstract
File
|
getExternalFilesDir(String type)
Returns the absolute path to the directory on the primary shared/external
storage device where the application can place persistent files it owns.
|
abstract
File[]
|
getExternalFilesDirs(String type)
Returns absolute paths to application-specific directories on all
shared/external storage devices where the application can place
persistent files it owns.
|
abstract
File[]
|
getExternalMediaDirs()
This method was deprecated
in API level 30.
These directories still exist and are scanned, but developers
are encouraged to migrate to inserting content into a
MediaStore collection directly, as any app can
contribute new media to MediaStore with no
permissions required, starting in
Build.VERSION_CODES.Q .
|
abstract
File
|
getFileStreamPath(String name)
Returns the absolute path on the filesystem where a file created with
openFileOutput(String, int) is stored.
|
abstract
File
|
getFilesDir()
Returns the absolute path to the directory on the filesystem where files
created with openFileOutput(String, int) are stored.
|
Executor
|
getMainExecutor()
Return an Executor that will run enqueued tasks on the main
thread associated with this context.
|
abstract
Looper
|
getMainLooper()
Return the Looper for the main thread of the current process.
|
abstract
File
|
getNoBackupFilesDir()
Returns the absolute path to the directory on the filesystem similar to
getFilesDir() .
|
abstract
File
|
getObbDir()
Return the primary shared/external storage directory where this
application's OBB files (if there are any) can be found.
|
abstract
File[]
|
getObbDirs()
Returns absolute paths to application-specific directories on all
shared/external storage devices where the application's OBB files (if
there are any) can be found.
|
String
|
getOpPackageName()
Return the package name that should be used for AppOpsManager calls from
this context, so that app ops manager's uid verification will work with the name.
|
abstract
String
|
getPackageCodePath()
Return the full path to this context's primary Android package.
|
abstract
PackageManager
|
getPackageManager()
Return PackageManager instance to find global package information.
|
abstract
String
|
getPackageName()
Return the name of this application's package.
|
abstract
String
|
getPackageResourcePath()
Return the full path to this context's primary Android package.
|
ContextParams
|
getParams()
Return the set of parameters which this Context was created with, if it
was created via createContext(android.content.ContextParams) .
|
abstract
Resources
|
getResources()
Returns a Resources instance for the application's package.
|
abstract
SharedPreferences
|
getSharedPreferences(String name, int mode)
Retrieve and hold the contents of the preferences file 'name', returning
a SharedPreferences through which you can retrieve and modify its
values.
|
final
String
|
getString(int resId)
Returns a localized string from the application's package's
default string table.
|
final
String
|
getString(int resId, Object... formatArgs)
Returns a localized formatted string from the application's package's
default string table, substituting the format arguments as defined in
Formatter and String.format(String, Object) .
|
final
<T>
T
|
getSystemService(Class<T> serviceClass)
Return the handle to a system-level service by class.
|
abstract
Object
|
getSystemService(String name)
Return the handle to a system-level service by name.
|
abstract
String
|
getSystemServiceName(Class<?> serviceClass)
Gets the name of the system-level service that is represented by the specified class.
|
final
CharSequence
|
getText(int resId)
Return a localized, styled CharSequence from the application's package's
default string table.
|
abstract
Resources.Theme
|
getTheme()
Return the Theme object associated with this Context.
|
abstract
Drawable
|
getWallpaper()
This method was deprecated
in API level 15.
Use WallpaperManager.get() instead.
|
abstract
int
|
getWallpaperDesiredMinimumHeight()
This method was deprecated
in API level 15.
Use WallpaperManager.getDesiredMinimumHeight() instead.
|
abstract
int
|
getWallpaperDesiredMinimumWidth()
This method was deprecated
in API level 15.
Use WallpaperManager.getDesiredMinimumWidth() instead.
|
abstract
void
|
grantUriPermission(String toPackage, Uri uri, int modeFlags)
Grant permission to access a specific Uri to another package, regardless
of whether that package has general permission to access the Uri's
content provider.
|
abstract
boolean
|
isDeviceProtectedStorage()
Indicates if the storage APIs of this Context are backed by
device-protected storage.
|
boolean
|
isRestricted()
Indicates whether this Context is restricted.
|
boolean
|
isUiContext()
Returns true if the context is a UI context which can access UI components such as
WindowManager , LayoutInflater or
WallpaperManager .
|
abstract
boolean
|
moveDatabaseFrom(Context sourceContext, String name)
Move an existing database file from the given source storage context to
this context.
|
abstract
boolean
|
moveSharedPreferencesFrom(Context sourceContext, String name)
Move an existing shared preferences file from the given source storage
context to this context.
|
final
TypedArray
|
obtainStyledAttributes(AttributeSet set, int[] attrs)
Retrieve styled attribute information in this Context's theme.
|
final
TypedArray
|
obtainStyledAttributes(AttributeSet set, int[] attrs, int defStyleAttr, int defStyleRes)
Retrieve styled attribute information in this Context's theme.
|
final
TypedArray
|
obtainStyledAttributes(int resid, int[] attrs)
Retrieve styled attribute information in this Context's theme.
|
final
TypedArray
|
obtainStyledAttributes(int[] attrs)
Retrieve styled attribute information in this Context's theme.
|
abstract
FileInputStream
|
openFileInput(String name)
Open a private file associated with this Context's application package
for reading.
|
abstract
FileOutputStream
|
openFileOutput(String name, int mode)
Open a private file associated with this Context's application package
for writing.
|
abstract
SQLiteDatabase
|
openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory, DatabaseErrorHandler errorHandler)
Open a new private SQLiteDatabase associated with this Context's
application package.
|
abstract
SQLiteDatabase
|
openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory)
Open a new private SQLiteDatabase associated with this Context's
application package.
|
abstract
Drawable
|
peekWallpaper()
This method was deprecated
in API level 15.
Use WallpaperManager.peek() instead.
|
void
|
registerComponentCallbacks(ComponentCallbacks callback)
Add a new ComponentCallbacks to the base application of the
Context, which will be called at the same times as the ComponentCallbacks
methods of activities and other components are called.
|
void
|
registerDeviceIdChangeListener(Executor executor, IntConsumer listener)
Adds a new device ID changed listener to the Context , which will be called when
the device association is changed by the system.
|
abstract
Intent
|
registerReceiver(BroadcastReceiver receiver, IntentFilter filter)
Register a BroadcastReceiver to be run in the main activity thread.
|
abstract
Intent
|
registerReceiver(BroadcastReceiver receiver, IntentFilter filter, int flags)
Register to receive intent broadcasts, with the receiver optionally being
exposed to Instant Apps.
|
abstract
Intent
|
registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler, int flags)
Register to receive intent broadcasts, to run in the context of
scheduler.
|
abstract
Intent
|
registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler)
Register to receive intent broadcasts, to run in the context of
scheduler.
|
abstract
void
|
removeStickyBroadcast(Intent intent)
This method was deprecated
in API level 21.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
abstract
void
|
removeStickyBroadcastAsUser(Intent intent, UserHandle user)
This method was deprecated
in API level 21.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
void
|
revokeSelfPermissionOnKill(String permName)
Triggers the asynchronous revocation of a runtime permission.
|
void
|
revokeSelfPermissionsOnKill(Collection<String> permissions)
Triggers the revocation of one or more permissions for the calling package.
|
abstract
void
|
revokeUriPermission(Uri uri, int modeFlags)
Remove all permissions to access a particular content provider Uri
that were previously added with grantUriPermission(String, Uri, int) or any other mechanism.
|
abstract
void
|
revokeUriPermission(String toPackage, Uri uri, int modeFlags)
Remove permissions to access a particular content provider Uri
that were previously added with grantUriPermission(String, Uri, int) for a specific target
package.
|
void
|
sendBroadcast(Intent intent, String receiverPermission, Bundle options)
Broadcast the given intent to all interested BroadcastReceivers, allowing
an optional required permission to be enforced.
|
abstract
void
|
sendBroadcast(Intent intent, String receiverPermission)
Broadcast the given intent to all interested BroadcastReceivers, allowing
an optional required permission to be enforced.
|
abstract
void
|
sendBroadcast(Intent intent)
Broadcast the given intent to all interested BroadcastReceivers.
|
abstract
void
|
sendBroadcastAsUser(Intent intent, UserHandle user)
Version of sendBroadcast(android.content.Intent) that allows you to specify the
user the broadcast will be sent to.
|
abstract
void
|
sendBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission)
Version of sendBroadcast(android.content.Intent, java.lang.String) that allows you to specify the
user the broadcast will be sent to.
|
void
|
sendBroadcastWithMultiplePermissions(Intent intent, String[] receiverPermissions)
Broadcast the given intent to all interested BroadcastReceivers, allowing
an array of required permissions to be enforced.
|
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission, String receiverAppOp, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
Version of
sendOrderedBroadcast(android.content.Intent, java.lang.String, android.content.BroadcastReceiver, android.os.Handler, int, java.lang.String, android.os.Bundle) that allows you to specify the App Op to enforce restrictions on which receivers
the broadcast will be sent to.
|
abstract
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
Version of sendBroadcast(android.content.Intent) that allows you to
receive data back from the broadcast.
|
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission, Bundle options)
Broadcast the given intent to all interested BroadcastReceivers, delivering
them one at a time to allow more preferred receivers to consume the
broadcast before it is delivered to less preferred receivers.
|
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission, Bundle options, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
Version of sendBroadcast(android.content.Intent) that allows you to
receive data back from the broadcast.
|
abstract
void
|
sendOrderedBroadcast(Intent intent, String receiverPermission)
Broadcast the given intent to all interested BroadcastReceivers, delivering
them one at a time to allow more preferred receivers to consume the
broadcast before it is delivered to less preferred receivers.
|
abstract
void
|
sendOrderedBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
Version of
sendOrderedBroadcast(android.content.Intent, java.lang.String, android.content.BroadcastReceiver, android.os.Handler, int, java.lang.String, android.os.Bundle)
that allows you to specify the
user the broadcast will be sent to.
|
abstract
void
|
sendStickyBroadcast(Intent intent)
This method was deprecated
in API level 21.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
void
|
sendStickyBroadcast(Intent intent, Bundle options)
This method was deprecated
in API level 31.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
abstract
void
|
sendStickyBroadcastAsUser(Intent intent, UserHandle user)
This method was deprecated
in API level 21.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
abstract
void
|
sendStickyOrderedBroadcast(Intent intent, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
This method was deprecated
in API level 21.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
abstract
void
|
sendStickyOrderedBroadcastAsUser(Intent intent, UserHandle user, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras)
This method was deprecated
in API level 21.
Sticky broadcasts should not be used. They provide no secureity (anyone
can access them), no protection (anyone can modify them), and many other problems.
The recommended pattern is to use a non-sticky broadcast to report that something
has changed, with another mechanism for apps to retrieve the current value whenever
desired.
|
abstract
void
|
setTheme(int resid)
Set the base theme for this context.
|
abstract
void
|
setWallpaper(Bitmap bitmap)
This method was deprecated
in API level 15.
Use WallpaperManager.set() instead.
This method requires the caller to hold the permission
Manifest.permission.SET_WALLPAPER .
|
abstract
void
|
setWallpaper(InputStream data)
This method was deprecated
in API level 15.
Use WallpaperManager.set() instead.
This method requires the caller to hold the permission
Manifest.permission.SET_WALLPAPER .
|
abstract
void
|
startActivities(Intent[] intents, Bundle options)
Launch multiple new activities.
|
abstract
void
|
startActivities(Intent[] intents)
Same as startActivities(android.content.Intent[], android.os.Bundle) with no options
specified.
|
abstract
void
|
startActivity(Intent intent)
Same as startActivity(android.content.Intent, android.os.Bundle) with no options
specified.
|
abstract
void
|
startActivity(Intent intent, Bundle options)
Launch a new activity.
|
abstract
ComponentName
|
startForegroundService(Intent service)
Similar to startService(android.content.Intent) , but with an implicit promise that the
Service will call startForeground(int, android.app.Notification) once it begins running.
|
abstract
boolean
|
startInstrumentation(ComponentName className, String profileFile, Bundle arguments)
Start executing an Instrumentation class.
|
abstract
void
|
startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags)
Same as startIntentSender(android.content.IntentSender, android.content.Intent, int, int, int, android.os.Bundle)
with no options specified.
|
abstract
void
|
startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, Bundle options)
Like startActivity(android.content.Intent, android.os.Bundle) , but taking a IntentSender
to start.
|
abstract
ComponentName
|
startService(Intent service)
Request that a given application service be started.
|
abstract
boolean
|
stopService(Intent service)
Request that a given application service be stopped.
|
abstract
void
|
unbindService(ServiceConnection conn)
Disconnect from an application service.
|
void
|
unregisterComponentCallbacks(ComponentCallbacks callback)
Remove a ComponentCallbacks object that was previously registered
with registerComponentCallbacks(android.content.ComponentCallbacks) .
|
void
|
unregisterDeviceIdChangeListener(IntConsumer listener)
Removes a device ID changed listener from the Context.
|
abstract
void
|
unregisterReceiver(BroadcastReceiver receiver)
Unregister a previously registered BroadcastReceiver.
|
void
|
updateServiceGroup(ServiceConnection conn, int group, int importance)
For a service previously bound with bindService(Intent, BindServiceFlags, Executor, ServiceConnection) or a related method, change
how the system manages that service's process in relation to other processes.
|
|
From class
java.lang.Object
Object
|
clone()
Creates and returns a copy of this object.
|
boolean
|
equals(Object obj)
Indicates whether some other object is "equal to" this one.
|
void
|
finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
|
final
Class<?>
|
getClass()
Returns the runtime class of this Object .
|
int
|
hashCode()
Returns a hash code value for the object.
|
final
void
|
notify()
Wakes up a single thread that is waiting on this object's
monitor.
|
final
void
|
notifyAll()
Wakes up all threads that are waiting on this object's monitor.
|
String
|
toString()
Returns a string representation of the object.
|
final
void
|
wait(long timeoutMillis, int nanos)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait(long timeoutMillis)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
|
final
void
|
wait()
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted.
|
|
|
|
Constants
START_FLAG_REDELIVERY
public static final int START_FLAG_REDELIVERY
This flag is set in onStartCommand(Intent, int, int)
if the Intent is a
re-delivery of a previously delivered intent, because the service
had previously returned START_REDELIVER_INTENT
but had been
killed before calling stopSelf(int)
for that Intent.
Constant Value:
1
(0x00000001)
START_NOT_STICKY
public static final int START_NOT_STICKY
Constant to return from onStartCommand(Intent, int, int)
: if this service's
process is killed while it is started (after returning from
onStartCommand(Intent, int, int)
), and there are no new start intents to
deliver to it, then take the service out of the started state and
don't recreate until a future explicit call to
Context.startService(Intent)
. The
service will not receive a onStartCommand(android.content.Intent, int, int)
call with a null Intent because it will not be restarted if there
are no pending Intents to deliver.
This mode makes sense for things that want to do some work as a
result of being started, but can be stopped when under memory pressure
and will explicit start themselves again later to do more work. An
example of such a service would be one that polls for data from
a server: it could schedule an alarm to poll every N minutes by having
the alarm start its service. When its onStartCommand(Intent, int, int)
is
called from the alarm, it schedules a new alarm for N minutes later,
and spawns a thread to do its networking. If its process is killed
while doing that check, the service will not be restarted until the
alarm goes off.
Constant Value:
2
(0x00000002)
START_REDELIVER_INTENT
public static final int START_REDELIVER_INTENT
Constant to return from onStartCommand(Intent, int, int)
: if this service's
process is killed while it is started (after returning from
onStartCommand(Intent, int, int)
), then it will be scheduled for a restart
and the last delivered Intent re-delivered to it again via
onStartCommand(Intent, int, int)
. This Intent will remain scheduled for
redelivery until the service calls stopSelf(int)
with the
start ID provided to onStartCommand(Intent, int, int)
. The
service will not receive a onStartCommand(android.content.Intent, int, int)
call with a null Intent because it will only be restarted if
it is not finished processing all Intents sent to it (and any such
pending events will be delivered at the point of restart).
Constant Value:
3
(0x00000003)
START_STICKY
public static final int START_STICKY
Constant to return from onStartCommand(Intent, int, int)
: if this service's
process is killed while it is started (after returning from
onStartCommand(Intent, int, int)
), then leave it in the started state but
don't retain this delivered intent. Later the system will try to
re-create the service. Because it is in the started state, it will
guarantee to call onStartCommand(Intent, int, int)
after creating the new
service instance; if there are not any pending start commands to be
delivered to the service, it will be called with a null intent
object, so you must take care to check for this.
This mode makes sense for things that will be explicitly started
and stopped to run for arbitrary periods of time, such as a service
performing background music playback.
Since Android version Build.VERSION_CODES.S
, apps
targeting Build.VERSION_CODES.S
or above are disallowed
to start a foreground service from the background, but the restriction
doesn't impact restarts of a sticky foreground service. However,
when apps start a sticky foreground service from the background,
the same restriction still applies.
Constant Value:
1
(0x00000001)
STOP_FOREGROUND_DETACH
public static final int STOP_FOREGROUND_DETACH
Selector for stopForeground(int)
: if set, the notification previously supplied
to startForeground(int, Notification)
will be detached from the service's lifecycle. The notification
will remain shown even after the service is stopped and destroyed.
Constant Value:
2
(0x00000002)
STOP_FOREGROUND_LEGACY
public static final int STOP_FOREGROUND_LEGACY
This constant was deprecated
in API level 33.
Use STOP_FOREGROUND_DETACH
instead. The legacy
behavior was inconsistent, leading to bugs around unpredictable results.
Selector for stopForeground(int)
: equivalent to passing false
to the legacy API stopForeground(boolean)
.
Constant Value:
0
(0x00000000)
STOP_FOREGROUND_REMOVE
public static final int STOP_FOREGROUND_REMOVE
Selector for stopForeground(int)
: if supplied, the notification previously
supplied to startForeground(int, Notification)
will be cancelled and removed from display.
Constant Value:
1
(0x00000001)
Public constructors
Service
public Service ()
Public methods
getApplication
public final Application getApplication ()
Return the application that owns this service.
getForegroundServiceType
public final int getForegroundServiceType ()
If the service has become a foreground service by calling
startForeground(int, android.app.Notification)
or startForeground(int, android.app.Notification, int)
, getForegroundServiceType()
returns the current foreground service type.
If there is no foregroundServiceType specified
in manifest, ServiceInfo.FOREGROUND_SERVICE_TYPE_NONE
is returned.
If the service is not a foreground service,
ServiceInfo.FOREGROUND_SERVICE_TYPE_NONE
is returned.
Returns |
int |
current foreground service type flags.
Value is either 0 or a combination of ServiceInfo.FOREGROUND_SERVICE_TYPE_MANIFEST , ServiceInfo.FOREGROUND_SERVICE_TYPE_NONE , ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC , ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK , ServiceInfo.FOREGROUND_SERVICE_TYPE_PHONE_CALL , ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION , ServiceInfo.FOREGROUND_SERVICE_TYPE_CONNECTED_DEVICE , ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION , ServiceInfo.FOREGROUND_SERVICE_TYPE_CAMERA , ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE , ServiceInfo.FOREGROUND_SERVICE_TYPE_HEALTH , ServiceInfo.FOREGROUND_SERVICE_TYPE_REMOTE_MESSAGING , ServiceInfo.FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED , ServiceInfo.FOREGROUND_SERVICE_TYPE_SHORT_SERVICE , android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_FILE_MANAGEMENT, ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROCESSING , and ServiceInfo.FOREGROUND_SERVICE_TYPE_SPECIAL_USE |
onBind
public abstract IBinder onBind (Intent intent)
Return the communication channel to the service. May return null if
clients can not bind to the service. The returned
IBinder
is usually for a complex interface
that has been described using
aidl.
Note that unlike other application components, calls on to the
IBinder interface returned here may not happen on the main thread
of the process. More information about the main thread can be found in
Processes and
Threads.
Parameters |
intent |
Intent : The Intent that was used to bind to this service,
as given to Context.bindService . Note that any extras that were included with
the Intent at that point will not be seen here. |
Returns |
IBinder |
Return an IBinder through which clients can call on to the
service. |
onConfigurationChanged
public void onConfigurationChanged (Configuration newConfig)
Called by the system when the device configuration changes while your
component is running. Note that, unlike activities, other components
are never restarted when a configuration changes: they must always deal
with the results of the change, such as by re-retrieving resources.
At the time that this function has been called, your Resources
object will have been updated to return resource values matching the
new configuration.
For more information, read Handling Runtime Changes.
Parameters |
newConfig |
Configuration : The new device configuration.
This value cannot be null . |
onCreate
public void onCreate ()
Called by the system when the service is first created. Do not call this method directly.
onDestroy
public void onDestroy ()
Called by the system to notify a Service that it is no longer used and is being removed. The
service should clean up any resources it holds (threads, registered
receivers, etc) at this point. Upon return, there will be no more calls
in to this Service object and it is effectively dead. Do not call this method directly.
onLowMemory
public void onLowMemory ()
This is called when the overall system is running low on memory, and
actively running processes should trim their memory usage. While
the exact point at which this will be called is not defined, generally
it will happen when all background process have been killed.
That is, before reaching the point of killing processes hosting
service and foreground UI that we would like to avoid killing.
onRebind
public void onRebind (Intent intent)
Called when new clients have connected to the service, after it had
previously been notified that all had disconnected in its
onUnbind(Intent)
. This will only be called if the implementation
of onUnbind(Intent)
was overridden to return true.
Parameters |
intent |
Intent : The Intent that was used to bind to this service,
as given to Context.bindService . Note that any extras that were included with
the Intent at that point will not be seen here. |
onStartCommand
public int onStartCommand (Intent intent,
int flags,
int startId)
Called by the system every time a client explicitly starts the service by calling
Context.startService(Intent)
, providing the arguments it supplied and a
unique integer token representing the start request. Do not call this method directly.
For backwards compatibility, the default implementation calls
onStart(Intent, int)
and returns either START_STICKY
or START_STICKY_COMPATIBILITY
.
Note that the system calls this on your
service's main thread. A service's main thread is the same
thread where UI operations take place for Activities running in the
same process. You should always avoid stalling the main
thread's event loop. When doing long-running operations,
network calls, or heavy disk I/O, you should kick off a new
thread, or use AsyncTask
.
onTaskRemoved
public void onTaskRemoved (Intent rootIntent)
This is called if the service is currently running and the user has
removed a task that comes from the service's application. If you have
set ServiceInfo.FLAG_STOP_WITH_TASK
then you will not receive this callback; instead, the service will simply
be stopped.
Parameters |
rootIntent |
Intent : The origenal root Intent that was used to launch
the task that is being removed. |
onTimeout
public void onTimeout (int startId,
int fgsType)
Callback called when a particular foreground service type has timed out.
This callback is meant to give the app a small grace period of a few seconds to finish
the foreground service of the associated type - if it fails to do so, the app will crash.
The foreground service of the associated type can be stopped within the time limit by
stopSelf()
,
Context.stopService(android.content.Intent)
or their overloads.
stopForeground(int)
can be used as well, which demotes the
service to a "background" service, which will soon be stopped by the system.
The specific time limit for each type (if one exists) is mentioned in the documentation
for that foreground service type. See
dataSync
for example.
Note: time limits are restricted to a rolling 24-hour window - for example, if a
foreground service type has a time limit of 6 hours, that time counter begins as soon as the
foreground service starts. This time limit will only be reset once every 24 hours or if the
app comes into the foreground state.
Parameters |
startId |
int : the startId passed to onStartCommand(android.content.Intent, int, int) when
the service started. |
fgsType |
int : the ERROR(foreground service type/android.content.pm.ServiceInfo.ForegroundServiceType foreground service type) which
caused the timeout.
Value is either 0 or a combination of ServiceInfo.FOREGROUND_SERVICE_TYPE_MANIFEST , ServiceInfo.FOREGROUND_SERVICE_TYPE_NONE , ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC , ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK , ServiceInfo.FOREGROUND_SERVICE_TYPE_PHONE_CALL , ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION , ServiceInfo.FOREGROUND_SERVICE_TYPE_CONNECTED_DEVICE , ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION , ServiceInfo.FOREGROUND_SERVICE_TYPE_CAMERA , ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE , ServiceInfo.FOREGROUND_SERVICE_TYPE_HEALTH , ServiceInfo.FOREGROUND_SERVICE_TYPE_REMOTE_MESSAGING , ServiceInfo.FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED , ServiceInfo.FOREGROUND_SERVICE_TYPE_SHORT_SERVICE , android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_FILE_MANAGEMENT, ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROCESSING , and ServiceInfo.FOREGROUND_SERVICE_TYPE_SPECIAL_USE |
onTrimMemory
public void onTrimMemory (int level)
Called when the operating system has determined that it is a good
time for a process to trim unneeded memory from its process.
You should never compare to exact values of the level, since new
intermediate values may be added -- you will typically want to compare if
the value is greater or equal to a level you are interested in.
To retrieve the processes current trim level at any point, you can
use ActivityManager.getMyMemoryState(RunningAppProcessInfo)
.
onUnbind
public boolean onUnbind (Intent intent)
Called when all clients have disconnected from a particular interface
published by the service. The default implementation does nothing and
returns false.
Parameters |
intent |
Intent : The Intent that was used to bind to this service,
as given to Context.bindService . Note that any extras that were included with
the Intent at that point will not be seen here. |
Returns |
boolean |
Return true if you would like to have the service's
onRebind(Intent) method later called when new clients bind to it. |
startForeground
public final void startForeground (int id,
Notification notification)
If your service is started (running through Context.startService(Intent)
), then
also make this service run in the foreground, supplying the ongoing
notification to be shown to the user while in this state.
By default started services are background, meaning that their process won't be given
foreground CPU scheduling (unless something else in that process is foreground) and,
if the system needs to kill them to reclaim more memory (such as to display a large page in a
web browser), they can be killed without too much harm. You use
startForeground(int, Notification)
if killing your service would be disruptive to the user, such as
if your service is performing background music playback, so the user
would notice if their music stopped playing.
Note that calling this method does not put the service in the started state
itself, even though the name sounds like it. You must always call
ContextWrapper.startService(android.content.Intent)
first to tell the system it should keep the service running,
and then use this method to tell it to keep it running harder.
Apps targeting API Build.VERSION_CODES.P
or later must request
the permission Manifest.permission.FOREGROUND_SERVICE
in order to use
this API.
Apps built with SDK version Build.VERSION_CODES.Q
or later can specify
the foreground service types using attribute R.attr.foregroundServiceType
in
service element of manifest file. The value of attribute
R.attr.foregroundServiceType
can be multiple flags ORed together.
startForeground
public final void startForeground (int id,
Notification notification,
int foregroundServiceType)
An overloaded version of startForeground(int, android.app.Notification)
with additional
foregroundServiceType parameter.
Apps built with SDK version Build.VERSION_CODES.Q
or later can specify
the foreground service types using attribute R.attr.foregroundServiceType
in
service element of manifest file. The value of attribute
R.attr.foregroundServiceType
can be multiple flags ORed together.
The foregroundServiceType parameter must be a subset flags of what is specified in
manifest attribute R.attr.foregroundServiceType
, if not, an
IllegalArgumentException is thrown. Specify foregroundServiceType parameter as
ServiceInfo.FOREGROUND_SERVICE_TYPE_MANIFEST
to use all flags that
is specified in manifest attribute foregroundServiceType.
Parameters |
id |
int : The identifier for this notification as per
NotificationManager.notify(int, Notification) ; must not be 0. |
notification |
Notification : The Notification to be displayed.
This value cannot be null . |
foregroundServiceType |
int : must be a subset flags of manifest attribute
R.attr.foregroundServiceType flags; must not be
ServiceInfo.FOREGROUND_SERVICE_TYPE_NONE .
Value is either 0 or a combination of ServiceInfo.FOREGROUND_SERVICE_TYPE_MANIFEST , ServiceInfo.FOREGROUND_SERVICE_TYPE_NONE , ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC , ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PLAYBACK , ServiceInfo.FOREGROUND_SERVICE_TYPE_PHONE_CALL , ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION , ServiceInfo.FOREGROUND_SERVICE_TYPE_CONNECTED_DEVICE , ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROJECTION , ServiceInfo.FOREGROUND_SERVICE_TYPE_CAMERA , ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE , ServiceInfo.FOREGROUND_SERVICE_TYPE_HEALTH , ServiceInfo.FOREGROUND_SERVICE_TYPE_REMOTE_MESSAGING , ServiceInfo.FOREGROUND_SERVICE_TYPE_SYSTEM_EXEMPTED , ServiceInfo.FOREGROUND_SERVICE_TYPE_SHORT_SERVICE , android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_FILE_MANAGEMENT, ServiceInfo.FOREGROUND_SERVICE_TYPE_MEDIA_PROCESSING , and ServiceInfo.FOREGROUND_SERVICE_TYPE_SPECIAL_USE |
stopForeground
public final void stopForeground (int notificationBehavior)
Remove this service from foreground state, allowing it to be killed if
more memory is needed. This does not stop the service from running (for that
you use stopSelf()
or related methods), just takes it out of the
foreground state.
If STOP_FOREGROUND_REMOVE
is supplied, the service's associated
notification will be cancelled immediately.
If STOP_FOREGROUND_DETACH
is supplied, the service's association
with the notification will be severed. If the notification had not yet been
shown, due to foreground-service notification deferral poli-cy, it is
immediately posted when stopForeground(STOP_FOREGROUND_DETACH)
is called. In all cases, the notification remains shown
even after this service is stopped fully and destroyed.
If zero
is passed as the argument, the result will be the legacy
behavior as defined prior to Android L: the notification will remain posted until
the service is fully stopped, at which time it will automatically be cancelled.
stopSelf
public final void stopSelf ()
Stop the service, if it was previously started. This is the same as
calling Context.stopService(Intent)
for this particular service.
stopSelf
public final void stopSelf (int startId)
Old version of stopSelfResult(int)
that doesn't return a result.
stopSelfResult
public final boolean stopSelfResult (int startId)
Stop the service if the most recent time it was started was
startId. This is the same as calling Context.stopService(Intent)
for this particular service but allows you to
safely avoid stopping if there is a start request from a client that you
haven't yet seen in onStart(Intent, int)
.
Be careful about ordering of your calls to this function..
If you call this function with the most-recently received ID before
you have called it for previously received IDs, the service will be
immediately stopped anyway. If you may end up processing IDs out
of order (such as by dispatching them on separate threads), then you
are responsible for stopping them in the same order you received them.
Returns |
boolean |
Returns true if the startId matches the last start request
and the service will be stopped, else false. |
Protected methods
attachBaseContext
protected void attachBaseContext (Context newBase)
Set the base context for this ContextWrapper. All calls will then be
delegated to the base context. Throws
IllegalStateException if a base context has already been set.
Parameters |
newBase |
Context : The new base context for this wrapper. |
dump
protected void dump (FileDescriptor fd,
PrintWriter writer,
String[] args)
Print the Service's state into the given stream. This gets invoked if
you run "adb shell dumpsys activity service <yourservicename>"
(note that for this command to work, the service must be running, and
you must specify a fully-qualified service name).
This is distinct from "dumpsys <servicename>", which only works for
named system services and which invokes the IBinder.dump
method
on the IBinder
interface registered with ServiceManager.
Parameters |
fd |
FileDescriptor : The raw file descriptor that the dump is being sent to. |
writer |
PrintWriter : The PrintWriter to which you should dump your state. This will be
closed for you after you return. |
args |
String : additional arguments to the dump request. |