| // 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. |
| |
| /// Flutter code sample for [SystemChrome.setSystemUIOverlayStyle]. |
| |
| import 'dart:math' as math; |
| |
| import 'package:flutter/material.dart'; |
| import 'package:flutter/services.dart'; |
| |
| void main() => runApp(const MyApp()); |
| |
| class MyApp extends StatelessWidget { |
| const MyApp({super.key}); |
| |
| static const String _title = 'Flutter Code Sample'; |
| |
| @override |
| Widget build(BuildContext context) { |
| return const MaterialApp( |
| title: _title, |
| home: MyStatefulWidget(), |
| ); |
| } |
| } |
| |
| class MyStatefulWidget extends StatefulWidget { |
| const MyStatefulWidget({super.key}); |
| |
| @override |
| State<MyStatefulWidget> createState() => _MyStatefulWidgetState(); |
| } |
| |
| class _MyStatefulWidgetState extends State<MyStatefulWidget> { |
| final math.Random _random = math.Random(); |
| SystemUiOverlayStyle _currentStyle = SystemUiOverlayStyle.light; |
| |
| void _changeColor() { |
| final Color color = Color.fromRGBO( |
| _random.nextInt(255), |
| _random.nextInt(255), |
| _random.nextInt(255), |
| 1.0, |
| ); |
| setState(() { |
| _currentStyle = SystemUiOverlayStyle.dark.copyWith( |
| statusBarColor: color, |
| ); |
| }); |
| } |
| |
| @override |
| Widget build(BuildContext context) { |
| return AnnotatedRegion<SystemUiOverlayStyle>( |
| value: _currentStyle, |
| child: Center( |
| child: ElevatedButton( |
| onPressed: _changeColor, |
| child: const Text('Change Color'), |
| ), |
| ), |
| ); |
| } |
| } |