blob: 459fa92ab9714b6d402e7d3e4316461782846a18 [file] [log] [blame]
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() {
runApp(new FlutterView());
}
class FlutterView extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter View',
theme: new ThemeData(
primarySwatch: Colors.grey,
),
home: new MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => new _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 =
const BasicMessageChannel<String>(_channel, const 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 new Scaffold(
body: new Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
new Expanded(
child: new Center(
child: new Text(
'Platform button tapped $_counter time${ _counter == 1 ? '' : 's' }.',
style: const TextStyle(fontSize: 17.0))
),
),
new Container(
padding: const EdgeInsets.only(bottom: 15.0, left: 5.0),
child: new Row(
children: <Widget>[
new Image.asset('assets/flutter-mark-square-64.png', scale: 1.5),
const Text('Flutter', style: const TextStyle(fontSize: 30.0)),
],
),
),
],
),
floatingActionButton: new FloatingActionButton(
onPressed: _sendFlutterIncrement,
child: const Icon(Icons.add),
),
);
}
}