update

.config/Code/User/History/-2e064889/dAFd.dart

@@ -0,0 +1,51 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+void main(){
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget{
+  const MyApp({super.key});
+  
+  @override
+  Widget build(BuildContext context){
+    return ChangeNotifierProvider(
+      create: (context) => MyAppState(),
+      child: MaterialApp(
+        title: 'First App',
+        theme: ThemeData(
+          useMaterial3: true,
+          colorScheme: ColorScheme.fromSeed(seedColor: Colors.green)
+        ),
+        home: const MyHomePage(),
+      ),
+    );
+  }
+}
+
+class MyAppState extends ChangeNotifier{
+  var counter = 0;
+}
+
+class MyHomePage extends StatelessWidget{
+  const MyHomePage({super.key});
+
+  @override
+  Widget build(BuildContext context){
+    var appState = context.watch<MyAppState>();
+    var sCount = appState.counter.toString();
+
+    return const Scaffold(
+      body: Column(
+        crossAxisAlignment: CrossAxisAlignment.center,
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          Text('count: '),
+          Text(sCount),
+        ],
+      )
+    );
+  }
+
+}