| // Copyright 2014 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'dart:ui'; |
| |
| import 'package:flutter/material.dart'; |
| import 'package:flutter/services.dart'; |
| |
| /// Flutter code sample for [ServicesBinding.handleRequestAppExit]. |
| |
| void main() { |
| runApp(const ApplicationExitExample()); |
| } |
| |
| class ApplicationExitExample extends StatelessWidget { |
| const ApplicationExitExample({super.key}); |
| |
| @override |
| Widget build(BuildContext context) { |
| return const MaterialApp( |
| home: Scaffold(body: Body()), |
| ); |
| } |
| } |
| |
| class Body extends StatefulWidget { |
| const Body({super.key}); |
| |
| @override |
| State<Body> createState() => _BodyState(); |
| } |
| |
| class _BodyState extends State<Body> with WidgetsBindingObserver { |
| bool _shouldExit = false; |
| String lastResponse = 'No exit requested yet'; |
| |
| @override |
| void initState() { |
| super.initState(); |
| WidgetsBinding.instance.addObserver(this); |
| } |
| |
| @override |
| void dispose() { |
| WidgetsBinding.instance.removeObserver(this); |
| super.dispose(); |
| } |
| |
| Future<void> _quit() async { |
| final AppExitType exitType = _shouldExit ? AppExitType.required : AppExitType.cancelable; |
| setState(() { |
| lastResponse = 'App requesting ${exitType.name} exit'; |
| }); |
| await ServicesBinding.instance.exitApplication(exitType); |
| } |
| |
| @override |
| Future<AppExitResponse> didRequestAppExit() async { |
| final AppExitResponse response = _shouldExit ? AppExitResponse.exit : AppExitResponse.cancel; |
| setState(() { |
| lastResponse = 'App responded ${response.name} to exit request'; |
| }); |
| return response; |
| } |
| |
| void _radioChanged(bool? value) { |
| value ??= true; |
| if (_shouldExit == value) { |
| return; |
| } |
| setState(() { |
| _shouldExit = value!; |
| }); |
| } |
| |
| @override |
| Widget build(BuildContext context) { |
| return Center( |
| child: SizedBox( |
| width: 300, |
| child: IntrinsicHeight( |
| child: Column( |
| children: <Widget>[ |
| RadioListTile<bool>( |
| title: const Text('Do Not Allow Exit'), |
| groupValue: _shouldExit, |
| value: false, |
| onChanged: _radioChanged, |
| ), |
| RadioListTile<bool>( |
| title: const Text('Allow Exit'), |
| groupValue: _shouldExit, |
| value: true, |
| onChanged: _radioChanged, |
| ), |
| const SizedBox(height: 30), |
| ElevatedButton( |
| onPressed: _quit, |
| child: const Text('Quit'), |
| ), |
| const SizedBox(height: 30), |
| Text(lastResponse), |
| ], |
| ), |
| ), |
| ), |
| ); |
| } |
| } |
