adaptive theme using adaptive_theme plugin

lib/main.dart

@@ -1,31 +1,40 @@
 import 'package:flutter/material.dart';
 import 'package:notes_app/screens/home/home.dart';
 import 'package:notes_app/components/storage.dart';
+import 'package:adaptive_theme/adaptive_theme.dart';
 
-void main() {
-  runApp(MyApp());
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  final savedThemeMode = await AdaptiveTheme.getThemeMode();
+  runApp(MyApp(savedThemeMode: savedThemeMode));
 }
 
 class MyApp extends StatelessWidget {
-  
+  const MyApp({ Key? key, required this.savedThemeMode }) : super(key: key);
+
+  final savedThemeMode;
+
   // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
-      title: 'Notes App',
-      theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // Try running your application with "flutter run". You'll see the
-        // application has a blue toolbar. Then, without quitting the app, try
-        // changing the primarySwatch below to Colors.green and then invoke
-        // "hot reload" (press "r" in the console where you ran "flutter run",
-        // or simply save your changes to "hot reload" in a Flutter IDE).
-        // Notice that the counter didn't reset back to zero; the application
-        // is not restarted.
-        primarySwatch: Colors.blue,
+    return AdaptiveTheme(
+      light: ThemeData(
+        brightness: Brightness.light,
+        primaryColor: Colors.white,
+        accentColor: Colors.black,
+      ),
+      dark: ThemeData(
+        brightness: Brightness.dark,
+        primarySwatch: Colors.red,
+        accentColor: Colors.amber,
+      ),
+      initial: savedThemeMode ?? AdaptiveThemeMode.system,
+      builder: (theme, darkTheme) => MaterialApp(
+        title: 'Simple Notes',
+        theme: theme,
+        darkTheme: darkTheme,
+        home: MyHomePage(storage: CounterStorage(),),
       ),
-      home: MyHomePage(storage: CounterStorage()),
     );
   }
 }

lib/screens/home/home.dart

@@ -79,7 +79,7 @@ class _MyHomePageState extends State<MyHomePage> {
               widget.storage.openNote(context, "");
             },
             tooltip: 'Take a new note',
-            child: Icon(Icons.note_alt_sharp),
+            child: Icon(Icons.add),
           ),
         ),
         onWillPop: () async {
@@ -168,7 +168,7 @@ class _MyHomePageState extends State<MyHomePage> {
   /* DROP DOWN MENUS*/
   DropdownButton btnAppBarMoreSelect() {
     return DropdownButton<String>(
-      icon: const Icon(Icons.more_vert, color: Colors.white),
+      icon: const Icon(Icons.more_vert),
       onChanged: (String? newValue) {
         switch (newValue) {
           case "Delete":
@@ -224,7 +224,7 @@ class _MyHomePageState extends State<MyHomePage> {
 
   DropdownButton btnAppBarMoreNoSelect(BuildContext context) {
     return DropdownButton<String>(
-      icon: const Icon(Icons.more_vert, color: Colors.white),
+      icon: const Icon(Icons.more_vert),
       onChanged: (String? newValue) {
         switch (newValue) {
           case "Select":

lib/screens/settings/settings.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:notes_app/components/storage.dart';
 import 'package:notes_app/screens/home/home.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import 'package:adaptive_theme/adaptive_theme.dart';
 
 class Settings extends StatefulWidget {
   const Settings({Key? key, required this.storage}) : super(key: key);
@@ -135,11 +136,26 @@ class _SettingsState extends State<Settings> {
         });
   }
 
-  void _setTheme(dynamic newTheme) async {
-    final prefs = await SharedPreferences.getInstance();
-    prefs.setString("theme", _theme);
+  void _setTheme(dynamic newTheme) {
+    // final prefs = await SharedPreferences.getInstance();
+
+    // prefs.setString("theme", _theme);
     setState(() {
       _theme = newTheme;
+      switch (_theme) {
+        case "Dark":
+          // sets theme mode to dark
+          AdaptiveTheme.of(context).setDark();
+          break;
+        case "Light":
+          // sets theme mode to light
+          AdaptiveTheme.of(context).setLight();
+          break;
+        case "Follow System":
+          // sets theme mode to system default
+          AdaptiveTheme.of(context).setSystem();
+          break;
+      }
       Navigator.of(context).pop();
     });
   }

pubspec.lock

@@ -1,6 +1,13 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  adaptive_theme:
+    dependency: "direct main"
+    description:
+      name: adaptive_theme
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.0"
   async:
     dependency: transitive
     description:

pubspec.yaml

@@ -30,6 +30,7 @@ dependencies:
   cupertino_icons: ^1.0.3
   path_provider: ^2.0.4
   shared_preferences: ^2.0.7
+  adaptive_theme: ^2.2.0
 
 dev_dependencies:
   flutter_test:

test/widget_test.dart

@@ -1,30 +0,0 @@
-// This is a basic Flutter widget test.
-//
-// To perform an interaction with a widget in your test, use the WidgetTester
-// utility that Flutter provides. For example, you can send tap and scroll
-// gestures. You can also use WidgetTester to find child widgets in the widget
-// tree, read text, and verify that the values of widget properties are correct.
-
-import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'package:notes_app/main.dart';
-
-void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
-    // Build our app and trigger a frame.
-    await tester.pumpWidget(MyApp());
-
-    // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
-
-    // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
-    await tester.pump();
-
-    // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
-  });
-}