Flutter 国际化demo

import 'package:flutter/material.dart'; import 'package:loca/language_tool.dart'; import 'package:loca/shared_preferences_manager.dart'; import 'package:flutter_localizations/flutter_localizations.dart'; import 'generated/l10n.dart'; void main() async{ WidgetsFlutterBinding.ensureInitialized(); final c = await SharedPreferencesManager().getLanguage(); LanguageTool.currentSettingLanguage = c; runApp(const MyApp()); } class MyApp extends StatelessWidget { const MyApp({super.key}); // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple), useMaterial3: true, ), locale: LanguageTool.supportedLocales[LanguageTool.currentSettingLanguage] , supportedLocales: LanguageTool.supportedLocales.values, localizationsDelegates: const [ GlobalCupertinoLocalizations.delegate, GlobalMaterialLocalizations.delegate, GlobalWidgetsLocalizations.delegate, S.delegate, ], home: const MyHomePage(title: 'Flutter Demo Home Page'), ); } } class MyHomePage extends StatefulWidget { const MyHomePage({super.key, required this.title}); final String title; @override State<MyHomePage> createState() => _MyHomePageState(); } class _MyHomePageState extends State<MyHomePage> { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( backgroundColor: Theme.of(context).colorScheme.inversePrimary, title: Text(widget.title), ), body: Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ GestureDetector( onTap: (){ SharedPreferencesManager().setLanguage(""); SharedPreferencesManager().getLanguage().then((value){ LanguageTool.currentSettingLanguage = value; runApp(const MyApp()); }); }, child: const Text( "跟随系统", style: TextStyle(fontSize: 18), ), ), const SizedBox(height: 20,), GestureDetector( onTap: (){ SharedPreferencesManager().setLanguage("简体中文"); SharedPreferencesManager().getLanguage().then((value){ LanguageTool.currentSettingLanguage = value; runApp(const MyApp()); }); }, child: const Text( "切换成中文", style: TextStyle(fontSize: 18), ), ), const SizedBox(height: 20,), GestureDetector( onTap: (){ SharedPreferencesManager().setLanguage("English"); SharedPreferencesManager().getLanguage().then((value){ LanguageTool.currentSettingLanguage = value; runApp(const MyApp()); }); }, child: const Text( "切换成英文", style: TextStyle(fontSize: 18), ), ), const SizedBox(height: 20,), GestureDetector( onTap: (){ SharedPreferencesManager().setLanguage("日本語"); SharedPreferencesManager().getLanguage().then((value){ LanguageTool.currentSettingLanguage = value; runApp(const MyApp()); }); }, child: const Text( "切换成日文", style: TextStyle(fontSize: 18), ), ), const SizedBox(height: 50,), Text( S.current.app_name, style: Theme.of(context).textTheme.headlineMedium, ), ], ), ), // This trailing comma makes auto-formatting nicer for build methods. ); } }