import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
void main() {
runApp(
const ProviderScope(child: MyApp()),
);
}
final counterProvider = StateProvider((ref) => 0);
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
colorSchemeSeed: Colors.blue,
useMaterial3: true,
),
home: const MyHomePage(),
);
}
}
class MyHomePage extends ConsumerWidget {
const MyHomePage({Key? key}) : super(key: key);
@override
Widget build(BuildContext context, WidgetRef ref) {
return Scaffold(
appBar: AppBar(
title: const Text('Riverpod example'),
),
body: Center(
child: Column(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text('You have pushed the button this many times:'),
Consumer(
builder: (context, ref, _) {
final count = ref.watch(counterProvider);
return Text(
'$count',
key: const Key('counterState'),
style: Theme.of(context).textTheme.headlineMedium,
);
},
),
],
),
),
floatingActionButton: FloatingActionButton(
key: const Key('increment_floatingActionButton'),
onPressed: () => ref.read(counterProvider.notifier).state++,
tooltip: 'Increment',
child: const Icon(Icons.add),
),
);
}
}