[Android] Adding/removing external keyboard resets the focused text field #167858
Comments
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#168100 Looks similar |
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Thanks to the investigation by @ash2moon it looks like this is the expected behavior on Android when configuration changes such as when external peripherals are connected/disconnected. See more information about configuration changes and how to handle them on Android here. On Android connecting/disconnecting external peripherals causes a configuration change which causes the system to recreate the activity, in this scenario all state is lost. I confirmed this with a basic jetpack compose app with a TextField and RadioButtons and also observed that the state is lost when connecting/disconnecting peripherals. Jetpack compose has a solution for restoring state across configuration changes called On Flutter we have similar solutions to restore state across configuration changes and activity destruction, you can read more about them in
import 'package:flutter/material.dart';
void main() {
runApp(
MaterialApp(
restorationScopeId: 'materialRoot',
home: Scaffold(
body: Center(child: TextField(restorationId: 'myTextField')),
),
),
);
}
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(restorationScopeId: 'materialRoot', home: MyHomePage());
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key});
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with RestorationMixin {
final RestorableTextEditingController _controller =
RestorableTextEditingController();
@override
void dispose() {
_controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(child: TextField(controller: _controller.value)),
);
}
@override
String? get restorationId => 'myHomePage';
@override
void restoreState(RestorationBucket? oldBucket, bool initialRestore) {
registerForRestoration(_controller, 'myTextEditingController');
}
}Besides Closing this issue as WAI for now because the Flutter behavior matches the Android behavior in the same scenario, and we have similar mechanisms to restore state. Feel free to reopen if this needs further discussion. |
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Steps to reproduce
Expected results
I can continue typing in the text field using my external keyboard.
Actual results
The focused text field's content is reset.
Code sample
Code sample
Screenshots or Video
N/A
Logs
N/A
Flutter Doctor output
Doctor output
The text was updated successfully, but these errors were encountered: