adaptive_theme 2.0.0-nullsafety.1

Allows to change between light and dark theme dynamically and add system adaptive theme support.

example/lib/main.dart

import 'package:adaptive_theme/adaptive_theme.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  final savedThemeMode = await AdaptiveTheme.getThemeMode();
  runApp(MyApp(savedThemeMode: savedThemeMode));
}

class MyApp extends StatelessWidget {
  final AdaptiveThemeMode? savedThemeMode;

  const MyApp({Key? key, this.savedThemeMode}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return AdaptiveTheme(
      light: ThemeData(
        brightness: Brightness.light,
        primarySwatch: Colors.red,
        accentColor: Colors.amber,
      ),
      dark: ThemeData(
        brightness: Brightness.dark,
        primarySwatch: Colors.red,
        accentColor: Colors.amber,
      ),
      initial: savedThemeMode ?? AdaptiveThemeMode.light,
      builder: (theme, darkTheme) => MaterialApp(
        title: 'Adaptive Theme Demo',
        theme: theme,
        darkTheme: darkTheme,
        home: MyHomePage(),
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return AnimatedTheme(
      duration: Duration(milliseconds: 300),
      data: Theme.of(context),
      child: Scaffold(
        appBar: AppBar(
          title: Text('Adaptive Theme Demo'),
        ),
        body: SizedBox.expand(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.center,
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              ElevatedButton(
                onPressed: () {
                  AdaptiveTheme.of(context).toggleThemeMode();
                },
                child: Text('Toggle Theme Mode'),
              ),
              ElevatedButton(
                onPressed: () {
                  AdaptiveTheme.of(context).setDark();
                },
                child: Text('Set Dark'),
              ),
              ElevatedButton(
                onPressed: () {
                  AdaptiveTheme.of(context).setLight();
                },
                child: Text('set Light'),
              ),
              ElevatedButton(
                onPressed: () {
                  AdaptiveTheme.of(context).setSystem();
                },
                child: Text('Set System Default'),
              ),
            ],
          ),
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: () {},
          child: Icon(Icons.add),
        ),
      ),
    );
  }
}