update the version of sdk with riverpod

add state notifier on new directory

Author: devkishor8007

lib/main.dart

@@ -1,4 +1,5 @@
-import 'package:exploring_riverpod/page/counterPage.dart';
+import 'package:exploring_riverpod/page/counterPage-notifer.dart';
+// import 'package:exploring_riverpod/page/counterPage.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
@@ -16,7 +17,8 @@ class MyApp extends StatelessWidget {
             backgroundColor: Colors.lightBlue.withBlue(3)),
       ),
       debugShowCheckedModeBanner: false,
-      home: CounterPage(),
+      // home: CounterPage(),  // for ChangeNotifier
+      home: CounterNotiferPage(), // for state notifer
     );
   }
 }

lib/page/counterPage-notifer.dart

@@ -0,0 +1,81 @@
+import 'package:exploring_riverpod/riverpod_counter.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+class CounterNotiferPage extends ConsumerWidget {
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final mq = MediaQuery.of(context).size;
+    var counter = ref.watch(counterNotifierProvider);
+    final appName = ref.watch(appNameRiverpod);
+    return SafeArea(
+      child: Scaffold(
+        appBar: appBar(appName, context),
+        floatingActionButton: rowfloatingActionButton(ref, mq),
+        body: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          crossAxisAlignment: CrossAxisAlignment.center,
+          children: [
+            Center(
+              child: Text(
+                "Value :  " + counter.toString(),
+                style: Theme.of(context)
+                    .textTheme
+                    .headline6!
+                    .copyWith(color: Colors.white),
+              ),
+            ),
+            SizedBox(
+              height: mq.height * 0.02,
+            ),
+            Text(
+              "Hope You'll like this! \nKeep Learning and Stay Safe",
+              style: Theme.of(context)
+                  .textTheme
+                  .caption!
+                  .copyWith(color: Colors.white),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget rowfloatingActionButton(WidgetRef ref, Size mq) {
+    return Row(
+      mainAxisAlignment: MainAxisAlignment.end,
+      children: [
+        FloatingActionButton(
+          onPressed: () {
+            ref.read(counterNotifierProvider.notifier).add();
+          },
+          child: Icon(Icons.add),
+        ),
+        SizedBox(
+          width: mq.width * 0.02,
+        ),
+        FloatingActionButton(
+          onPressed: () {
+            ref.read(counterNotifierProvider.notifier).subtract();
+          },
+          child: Icon(Icons.remove),
+        ),
+      ],
+    );
+  }
+
+  AppBar appBar(String appName, BuildContext context) {
+    return AppBar(
+      backgroundColor: Colors.transparent,
+      elevation: 0,
+      centerTitle: true,
+      title: Text(
+        '$appName',
+        style: Theme.of(context)
+            .textTheme
+            .headline5!
+            .copyWith(color: Colors.white),
+      ),
+    );
+  }
+}

lib/page/counterPage.dart

@@ -25,7 +25,7 @@ class CounterPage extends ConsumerWidget {
                 "Value :  " + applyCount.value.toString(),
                 style: Theme.of(context)
                     .textTheme
-                    .headline6
+                    .headline6!
                     .copyWith(color: Colors.white),
               ),
             ),
@@ -36,7 +36,7 @@ class CounterPage extends ConsumerWidget {
               "Hope You'll like this! \nKeep Learning and Stay Safe",
               style: Theme.of(context)
                   .textTheme
-                  .caption
+                  .caption!
                   .copyWith(color: Colors.white),
             ),
           ],
@@ -53,7 +53,7 @@ class CounterPage extends ConsumerWidget {
       title: Text(
         '$appName',
         style:
-            Theme.of(context).textTheme.headline5.copyWith(color: Colors.white),
+            Theme.of(context).textTheme.headline5!.copyWith(color: Colors.white),
       ),
     );
   }

lib/riverpod_counter.dart

@@ -18,3 +18,13 @@ class CounterRiverpod extends ChangeNotifier {
     notifyListeners();
   }
 }
+
+final counterNotifierProvider =
+    StateNotifierProvider<CounterNotifer, int>((_) => CounterNotifer());
+
+class CounterNotifer extends StateNotifier<int> {
+  CounterNotifer() : super(0);
+
+  void add() => state = state + 1;
+  void subtract() => state = state - 1;
+}

pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.2"
+    version: "2.9.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -21,42 +21,35 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.1"
+    version: "1.2.1"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0"
+    version: "1.16.0"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "1.0.5"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -68,7 +61,7 @@ packages:
       name: flutter_riverpod
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "2.0.2"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -80,28 +73,35 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.11"
+    version: "0.12.12"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.5"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.2"
   riverpod:
     dependency: transitive
     description:
       name: riverpod
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "2.0.2"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -113,7 +113,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.9.0"
   stack_trace:
     dependency: transitive
     description:
@@ -127,7 +127,7 @@ packages:
       name: state_notifier
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.7.0"
+    version: "0.7.2+1"
   stream_channel:
     dependency: transitive
     description:
@@ -141,35 +141,28 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.3"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
+    version: "0.4.12"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
-  flutter: ">=1.17.0"
+  dart: ">=2.18.0 <3.0.0"
+  flutter: ">=3.0.0"

pubspec.yaml

@@ -18,13 +18,13 @@ publish_to: "none" # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.18.0 <3.0.0"
 
 dependencies:
-  cupertino_icons: ^1.0.2
+  cupertino_icons: ^1.0.5
   flutter:
     sdk: flutter
-  flutter_riverpod: ^1.0.3
+  flutter_riverpod: ^2.0.2
 
 dev_dependencies:
   flutter_test: