responsive_theme 0.0.3
responsive_theme: ^0.0.3 copied to clipboard
Adaptive Styles – from DARK to BRIGHT. Powerful Theme Solution for Flutter Apps. "#flutter" "#responsive" "#theme"
import 'package:flutter/material.dart';
import 'package:responsive_theme/responsive_theme.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();
runApp(MultiProvider(providers: [ChangeNotifierProvider(create: (context) => ThemeProvider())], child: MyApp()));
}
/// First, create your color configurations:
/// Make lib/config/theme/app_colors.dart file for this
class AppColors {
final Color background;
final Color primary;
final Color secondary;
final Color accent;
final Color error;
final Color success;
/// add other as per you need. make sure to add new properties in toThemeColor() and ThemeColorKey extension
const AppColors({required this.background, required this.primary, required this.secondary, required this.accent, required this.error, required this.success});
/// Important for responsive_theme
ThemeColor toThemeColor() {
return {'background': background, 'primary': primary, 'secondary': secondary, 'accent': accent, 'error': error, 'success': success};
}
// Colors for light theme
factory AppColors.light() => AppColors(
background: Color(0xFFFFFFFF),
primary: Color(0xFF6200EE),
secondary: Color(0xFF03DAC6),
accent: Color(0xFF3700B3),
error: Color(0xFFB00020),
success: Color(0xFF4CAF50),
);
// Colors for dark theme
factory AppColors.dark() => AppColors(
background: Color(0xFF121212),
primary: Color(0xFFBB86FC),
secondary: Color(0xFF03DAC6),
accent: Color(0xFF03DAC5),
error: Color(0xFFCF6679),
success: Color(0xFF4CAF50),
);
}
/// this extention make easy to access colors
extension ThemeColorKey on ThemeColor {
Color get background => this['background']!;
Color get primary => this['primary']!;
Color get secondary => this['secondary']!;
Color get accent => this['accent']!;
Color get error => this['error']!;
Color get success => this['success']!;
ThemeColor toThemeColor() => this;
}
/// Then, create theme switching logic file:
/// Make lib/config/theme/theme_provider.dart file for this
/// (you can use any other state management technique i.e, theme_bloc.dart)
class ThemeProvider with ChangeNotifier {
ThemeProvider();
bool get darkTheme => _darkTheme;
bool _darkTheme = false;
AppThemeMode get theme => _darkTheme ? AppThemeMode.dark : AppThemeMode.light;
void toggleTheme({bool? isDark}) async {
_darkTheme = isDark ?? !_darkTheme;
// Shared Pref for store theme
final sp = await SharedPreferences.getInstance();
sp.setBool("isDarkTheme", _darkTheme);
notifyListeners();
}
void loadCurrentTheme(BuildContext context, {ThemeMode themeMode = ThemeMode.system}) async {
final sp = await SharedPreferences.getInstance();
final isDarkMode = sp.getBool("isDarkTheme");
if (isDarkMode == null) {
final useDarkTheme = switch (themeMode) {
ThemeMode.system => AppResponsiveTheme.colorModeOf(context) == AppThemeMode.dark,
ThemeMode.light => false,
ThemeMode.dark => true,
};
_darkTheme = useDarkTheme;
} else {
_darkTheme = isDarkMode;
}
notifyListeners();
}
}
/// My App - Responsive Theme Configuration
///
class MyApp extends StatefulWidget {
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
@override
void initState() {
super.initState();
/// TODO : must implement '[ThemeConfig.init]' to make responsive design
WidgetsBinding.instance.addPostFrameCallback((_) {
ThemeConfig.init(context);
context.read<ThemeProvider>().loadCurrentTheme(context);
});
}
@override
Widget build(BuildContext context) {
/// see Theme Switching section
return Consumer<ThemeProvider>(
builder: (context, state, _) {
return AppResponsiveTheme(
themeMode: state.theme,
config: ColorConfig(lightColors: AppColors.light().toThemeColor(), darkColors: AppColors.dark().toThemeColor()),
child: MaterialApp(
title: 'Responsive Theme App',
theme: state.darkTheme ? ThemeData.dark() : ThemeData.light(),
// themeMode: state.darkTheme ? ThemeMode.dark : ThemeMode.light,
debugShowCheckedModeBanner: false,
home: MyHomePage(),
),
);
},
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key});
final String title = "Responsive Theme Demo";
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: context.colors.background,
appBar: AppBar(
title: Txt.title18(widget.title),
actions: [
IconButton(
onPressed: () {
context.read<ThemeProvider>().toggleTheme();
},
icon: Icon(Icons.brightness_4_outlined),
),
],
),
body: Center(
child: ListView(
padding: Insets.medium16.paddingAll,
children: <Widget>[
VGap.large24(),
Txt.title24('Welcome to Responsive Theme', color: context.colors.primary, style: TextStyle(fontStyle: FontStyle.italic)),
VGap.medium16(),
Txt.regular16('Build beautiful responsive apps with ease', color: context.colors.success),
VGap.large24(),
const Txt.regular16('You have pushed the button this many times:'),
Txt('$_counter', style: context.textTheme?.title18),
VGap.large24(),
// Different text styles
Txt.titleX('Extra Large Title'),
Txt.title32('Large Title'),
Txt.title24('Medium Title'),
Txt.title18('Small Title'),
Txt.regular16('Regular text'),
Txt.regular14('Regular smaller text'),
Txt.small13('Small text'),
Txt.tiny12('Tiny text'),
// Specialized styles
Txt.appbar('App Bar Title'),
Txt.button('Button Text'),
// With additional styling
Txt.title24('Styled Title', color: context.colors.primary, maxLines: 2, textAlign: TextAlign.center),
VGap.large24(), // vertical gap
Row(
children: [
Icon(Icons.star),
HGap.xsmall8(), // horizontal gap
Txt.small13('Rating'),
],
),
VGap.large24(), // vertical gap
Padding(
padding: (Insets.medium16 + 4.0).paddingAll,
child: InkWell(
borderRadius: RadiusSize.medium16.borderRadiusCircular,
onTap: () {},
child: Container(
margin: EdgeInsets.all(4),
padding: Insets.medium16.paddingAll, // responsive padding/margin
decoration: BoxDecoration(
color: context.colors.primary,
// responsive radius size with extension
borderRadius: RadiusSize.medium16.borderRadiusCircular,
),
child: Txt.button('Rounded Container Button'),
),
),
),
VGap.large24(), // vertical gap
// Width-based scaling (scales with screen width)
Container(width: 20.w, height: 30.h, color: context.colors.error, child: Center(child: Txt.title18("Error color container"))),
VGap.large24(), // vertical gap
// Relative scaling (considers both dimensions)
Container(width: 15.r, height: 15.r, color: context.colors.secondary, child: Center(child: Txt.title18("Secondary color container"))),
// Text scaling (adjusts for different screen sizes)
Text('Responsive Text', style: TextStyle(fontSize: 2.t)),
VGap.large24(), // vertical gap
],
),
),
floatingActionButton: FloatingActionButton(onPressed: _incrementCounter, tooltip: 'Increment', child: const Icon(Icons.add)),
);
}
}