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lib/cases/counter/counter_page.dart

@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+
+class CounterPage extends StatefulWidget {
+  const CounterPage({super.key});
+
+
+
+  @override
+  State<CounterPage> createState() => _CounterPageState();
+}
+
+class _CounterPageState extends State<CounterPage> {
+  int _counter = 0;
+
+  void _incrementCounter() {
+    setState(() {
+      _counter++;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            const Text(
+              'You have pushed the button this many times:',
+            ),
+            Text(
+              '$_counter',
+              style: Theme.of(context).textTheme.headlineMedium,
+            ),
+          ],
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _incrementCounter,
+        tooltip: 'Increment',
+        child: const Icon(Icons.add),
+      ),
+    );
+  }
+}