64 lines
1.4 KiB
Dart
64 lines
1.4 KiB
Dart
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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void main(){
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runApp(const MyApp());
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}
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class MyApp extends StatelessWidget{
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const MyApp({super.key});
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@override
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Widget build(BuildContext context){
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return ChangeNotifierProvider(
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create: (context) => MyAppState(),
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child: MaterialApp(
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title: 'First App',
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theme: ThemeData(
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useMaterial3: true,
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colorScheme: ColorScheme.fromSeed(seedColor: Colors.green)
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),
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home: const MyHomePage(),
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),
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);
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}
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}
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class MyAppState extends ChangeNotifier{
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var counter = 0;
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void increment(){
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counter++;
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notifyListeners();
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}
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}
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class MyHomePage extends StatefulWidget{
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const MyHomePage({super.key});
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@override
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State<MyHomePage> createState() => _MyHomePageState();
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}
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class _MyHomePageState extends State<MyHomePage> {
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@override
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Widget build(BuildContext context){
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var appState = context.watch<MyAppState>();
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var sCount = appState.counter.toString();
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return Scaffold(
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Text('count: $sCount'),
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ElevatedButton(
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onPressed: () => appState.increment(),
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child: const Text('Increment')
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),
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],
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),
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)
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);
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}
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}
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