A Flutter plugin for persisting and dynamically changing the theme.

Online Demo: https://fluttercommunity.github.io/persist_theme/

import 'package:flutter/material.dart'; import 'package:persist_theme/persist_theme.dart'; import 'package:provider/provider.dart'; import 'package:scoped_model/scoped_model.dart'; import 'dart:io' show Platform; import 'package:flutter/foundation.dart'; /// main is entry point of Flutter application void main() { // Desktop platforms aren't a valid platform. _setTargetPlatformForDesktop(); return runApp(MyApp()); } /// If the current platform is desktop, override the default platform to /// a supported platform (iOS for macOS, Android for Linux and Windows). /// Otherwise, do nothing. void _setTargetPlatformForDesktop() { TargetPlatform targetPlatform; if (Platform.isMacOS) { targetPlatform = TargetPlatform.iOS; } else if (Platform.isLinux || Platform.isWindows) { targetPlatform = TargetPlatform.android; } if (targetPlatform != null) { debugDefaultTargetPlatformOverride = targetPlatform; } } final _model = ThemeModel(); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return ListenableProvider<ThemeModel>( create: (_) => _model..init(), child: Consumer<ThemeModel>( builder: (context, model, child) { return MaterialApp( theme: model.theme, home: HomeScreen(), ); }, ), ); } } class HomeScreen extends StatelessWidget { @override Widget build(BuildContext context) { final _theme = Provider.of<ThemeModel>(context); return Scaffold( appBar: AppBar( title: const Text('Persist Theme'), ), body: ListView( children: MediaQuery.of(context).size.width >= 480 ? <Widget>[ Flex( direction: Axis.horizontal, children: <Widget>[ Flexible(child: DarkModeSwitch()), Flexible(child: TrueBlackSwitch()), ], ), CustomThemeSwitch(), Flex( direction: Axis.horizontal, children: <Widget>[ Flexible(child: PrimaryColorPicker()), Flexible(child: AccentColorPicker()), ], ), DarkAccentColorPicker(), ] : <Widget>[ DarkModeSwitch(), TrueBlackSwitch(), CustomThemeSwitch(), PrimaryColorPicker(), AccentColorPicker(), DarkAccentColorPicker(), ], ), floatingActionButton: FloatingActionButton( backgroundColor: _theme.accentColor, child: Icon(Icons.add), onPressed: () {}, ), ); } }