locale_switcher 0.4.0

A widget for switching the locale of your application with 2 lines of code.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:locale_switcher/locale_switcher.dart';

/// Just useful extension
extension LocaleWithDelegate on Locale {
  /// Get class with translation strings for this locale.
  AppLocalizations get tr => lookupAppLocalizations(this);
}

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return LocaleManager(
      child: MaterialApp(
        locale: LocaleManager.locale.value,
        localizationsDelegates: AppLocalizations.localizationsDelegates,
        supportedLocales: AppLocalizations.supportedLocales,
        title: LocaleManager.locale.value.tr.example,
        home: MyHomePage(title: LocaleManager.locale.value.tr.example),
        debugShowCheckedModeBanner: false,
        theme: ThemeData(
          colorScheme: ColorScheme.fromSeed(seedColor: Colors.lightBlue[900]!),
          useMaterial3: true,
          textTheme: const TextTheme(bodyMedium: TextStyle(fontSize: 22)),
        ),
      ),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  Widget build(BuildContext context) {
    final loc = AppLocalizations.of(context);
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Center(
              child: SizedBox(
                width: 400,
                child: LocaleSwitcher(
                  title: loc.chooseLanguage,
                ),
              ),
            ),
            Center(
              child: SizedBox(
                width: 400,
                child: LocaleSwitcher(
                  title: loc.chooseLanguage,
                  numberOfShown: 2,
                ),
              ),
            ),
            const CounterWidget(),
          ],
        ),
      ),
    );
  }
}

/// OPTIONAL!!!
class CounterWidget extends StatefulWidget {
  const CounterWidget({super.key});

  @override
  State<CounterWidget> createState() => _CounterWidgetState();
}

class _CounterWidgetState extends State<CounterWidget> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    final loc = AppLocalizations.of(context);
    return Padding(
      padding: const EdgeInsets.all(20.0),
      child: Column(
        children: [
          const Divider(),
          const SizedBox(
            height: 20,
          ),
          Text(
            loc.counterDescription,
            textAlign: TextAlign.center,
            softWrap: false,
            overflow: TextOverflow.fade,
          ),
          Text(
            '$_counter',
            style: Theme.of(context).textTheme.headlineMedium,
          ),
          FloatingActionButton(
            onPressed: _incrementCounter,
            tooltip: loc.increment,
            child: const Icon(Icons.add),
          ),
        ],
      ),
    );
  }
}