| import 'package:flute/material.dart'; |
| |
| void main() { |
| runApp(MyApp()); |
| } |
| |
| class MyApp extends StatelessWidget { |
| @override |
| Widget build(BuildContext context) { |
| return MaterialApp( |
| title: 'Flutter Demo', |
| theme: ThemeData( |
| primarySwatch: Colors.blue, |
| ), |
| home: MyHomePage('Flutter Demo Home Page'), |
| ); |
| } |
| } |
| |
| class MyHomePage extends StatefulWidget { |
| MyHomePage(this.title); |
| |
| final String title; |
| |
| @override |
| _MyHomePageState createState() => _MyHomePageState(); |
| } |
| |
| class _MyHomePageState extends State<MyHomePage> { |
| int _counter = 0; |
| |
| void _incrementCounter() { |
| setState(() { |
| _counter++; |
| }); |
| } |
| |
| @override |
| Widget build(BuildContext context) { |
| return Scaffold( |
| appBar: AppBar( |
| title: Text(widget.title), |
| ), |
| body: Center( |
| child: Column( |
| mainAxisAlignment: MainAxisAlignment.center, |
| children: <Widget>[ |
| Text( |
| 'You have pushed the button this many times:', |
| ), |
| Text( |
| '$_counter', |
| style: Theme.of(context).textTheme.headline4, |
| ), |
| ], |
| ), |
| ), |
| floatingActionButton: FloatingActionButton( |
| onPressed: _incrementCounter, |
| tooltip: 'Increment', |
| child: Icon(Icons.add), |
| ), |
| ); |
| } |
| } |