| // 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:async'; |
| import 'package:flutter/material.dart'; |
| import 'package:flutter/services.dart'; |
| |
| void main() { |
| runApp(FlutterView()); |
| } |
| |
| class FlutterView extends StatelessWidget { |
| |
| @override |
| Widget build(BuildContext context) { |
| return MaterialApp( |
| title: 'Flutter View', |
| theme: ThemeData( |
| primarySwatch: Colors.grey, |
| ), |
| home: MyHomePage(), |
| ); |
| } |
| } |
| |
| class MyHomePage extends StatefulWidget { |
| @override |
| _MyHomePageState createState() => _MyHomePageState(); |
| } |
| |
| class _MyHomePageState extends State<MyHomePage> { |
| static const String _channel = 'increment'; |
| static const String _pong = 'pong'; |
| static const String _emptyMessage = ''; |
| static const BasicMessageChannel<String> platform = |
| BasicMessageChannel<String>(_channel, StringCodec()); |
| |
| int _counter = 0; |
| |
| @override |
| void initState() { |
| super.initState(); |
| platform.setMessageHandler(_handlePlatformIncrement); |
| } |
| |
| Future<String> _handlePlatformIncrement(String message) async { |
| setState(() { |
| _counter++; |
| }); |
| return _emptyMessage; |
| } |
| |
| void _sendFlutterIncrement() { |
| platform.send(_pong); |
| } |
| |
| @override |
| Widget build(BuildContext context) { |
| return Scaffold( |
| body: Column( |
| crossAxisAlignment: CrossAxisAlignment.start, |
| children: <Widget>[ |
| Expanded( |
| child: Center( |
| child: Text( |
| 'Platform button tapped $_counter time${ _counter == 1 ? '' : 's' }.', |
| style: const TextStyle(fontSize: 17.0)), |
| ), |
| ), |
| Container( |
| padding: const EdgeInsets.only(bottom: 15.0, left: 5.0), |
| child: Row( |
| children: <Widget>[ |
| Image.asset('assets/flutter-mark-square-64.png', scale: 1.5), |
| const Text('Flutter', style: TextStyle(fontSize: 30.0)), |
| ], |
| ), |
| ), |
| ], |
| ), |
| floatingActionButton: FloatingActionButton( |
| onPressed: _sendFlutterIncrement, |
| child: const Icon(Icons.add), |
| ), |
| ); |
| } |
| } |