【Flutter】多语言方案二：GetX 版

介绍

多语言方案：GetX版，需要手动自定义字符串引用常量，优点不需要自己管理状态。

运行效果

在这里插入图片描述

一、安装 GetX

dependencies:
get: ^4.6.6

二、使用

1.语言配置在lib/core下创建一个language文件夹，文件夹下创建一个local.dart文件

class Local {static const String appName = 'BraveComponent';static const String helloWorld = '你好，世界';static const String followerSystemLanguage = '跟随系统语言';static const String simplifiedChinese = '简体中文';static const String traditionalChinese = '繁体中文';static const String english = '英文';static const String setting = '设置';static const String multiLanguage = '多语言';static const String theme = '主题';
}

2.language文件夹下创建一个messages.dart文件

import 'package:get/get.dart';import 'local.dart';class Messages extends Translations {@overrideMap<String, Map<String, String>> get keys => {'zh_CN': {Local.appName: 'BraveComponent',Local.helloWorld: '你好，世界',Local.followerSystemLanguage: '跟随系统语言',Local.simplifiedChinese: '简体中文',Local.traditionalChinese: '繁体中文',Local.english: '英文',Local.setting: '设置',Local.multiLanguage: '多语言',Local.theme: '主题',},'zh_HK': {Local.appName: 'BraveComponent',Local.helloWorld: '妳好，世界',Local.followerSystemLanguage: '跟隨系統語言',Local.simplifiedChinese: '簡體中文',Local.traditionalChinese: '繁體中文',Local.english: '英文',Local.setting: '設置',Local.multiLanguage: '多語言',Local.theme: '主題',},'en_US': {Local.appName: 'BraveComponent',Local.helloWorld: 'HelloWorld',Local.followerSystemLanguage: 'FollowerSystemLanguage',Local.simplifiedChinese: 'SimplifiedChinese',Local.traditionalChinese: 'TraditionalChinese',Local.english: 'English',Local.setting: 'Setting',Local.multiLanguage: 'MultiLanguage',Local.theme: 'Theme',},};
}

3. 主入口MaterialApp改成GetMaterialApp

main.dart类

import 'package:flutter/material.dart';import 'app.dart';
import 'core/cache/cache/cache.dart';
import 'l10n_app.dart';void main() async {await Cache.instance.init();// runApp(L10nApp()); //flutter_localizations与GetX配合版的多语言runApp(const App()); //GetX版多语言
}

app.dart类

import 'package:brave_component/core/utils/language_utils.dart';
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:get/get.dart';import 'core/language/messages.dart';
import 'l10n/l10n.dart';
import 'routes/route_pages.dart';
import 'routes/route_path.dart';class App extends StatefulWidget {const App({super.key});@overrideState<App> createState() => AppState();
}class AppState extends State<App> {@overrideWidget build(BuildContext context) {return GetMaterialApp(initialRoute: RoutePath.main,getPages: RoutePages.getPages,title: 'component',theme: ThemeData(colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),useMaterial3: true,),translations: Messages(),locale: LanguageUtils.getLocale(),fallbackLocale: const Locale("zh", "CN"),localeResolutionCallback: (deviceLocale, supportedLocales) {print('当前语言：${deviceLocale.toString()}');return;},supportedLocales: AppLocalizations.supportedLocales,localizationsDelegates: const [AppLocalizations.delegate,GlobalCupertinoLocalizations.delegate,GlobalWidgetsLocalizations.delegate,GlobalMaterialLocalizations.delegate],);}
}

language_utils.dart类

import 'package:brave_component/l10n/l10n.dart';
import 'package:flutter/widgets.dart';
import 'package:get/get.dart';import '../../l10n_app.dart';
import '../cache/helpers/cache_helper.dart';
import '../enums/language.dart';class LanguageUtils {static String getLanguage(BuildContext context, String code) {late String language;switch (code) {case 'fs-Lan':language = context.l10n.followerSystemLanguage;break;case 'zh-CN':language = context.l10n.simplifiedChinese;break;case 'zh-HK':language = context.l10n.traditionalChinese;break;case 'en-US':language = context.l10n.english;break;default:language = context.l10n.followerSystemLanguage;break;}return language;}static Locale? getLocale() {Locale? locale;String code = CacheHelper.countryCode;List<String> lang = code.split('-');locale = (code == Language.fsLan.countryCode)? Get.deviceLocale: Locale(lang[0], lang[1]);return locale;}static void updateLocale(String countryCode, {bool isL10n = false}) {List<String> lang = countryCode.split('-');Get.updateLocale((countryCode == Language.fsLan.countryCode)? Get.deviceLocale!: Locale(lang[0], lang[1]));CacheHelper.saveCountryCode(countryCode);if (isL10n) {L10nAppState.setting.changeLocale!();}}
}

4. 配置及调用

translations: Messages(),//所有的多语言翻译资源
locale: Get.deviceLocale,//跟随系统设置语言 持久化以后这里改一下
fallbackLocale: Locale("zh", "CN"),//未提供当前Locale翻译时，备用的翻译

  - 使用   Text(Local.helloWorld.tr)

5.多语言切换

multi_language_view.dart类

import 'package:brave_component/core/enums/language.dart';
import 'package:brave_component/core/language/local.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';import '../../../../../core/res/colours.dart';
import '../../../../../widgets/base/texts.dart';
import 'multi_language_logic.dart';class MultiLanguagePage extends StatelessWidget {MultiLanguagePage({super.key});final logic = Get.find<MultiLanguageLogic>();@overrideWidget build(BuildContext context) {return Scaffold(appBar: AppBar(title: Texts.fontSize18Normal(Local.multiLanguage.tr,color: Colours.titleColor),leading: GestureDetector(onTap: () {Get.back(result: 'changeLanguage');},child: const Icon(Icons.arrow_back),),),body: Container(padding: const EdgeInsets.symmetric(vertical: 15),// child: ListView(//   children: ListTile.divideTiles(//           context: context,//           tiles: Language.values//               .map((e) =>//                   GetBuilder<MultiLanguageLogic>(builder: (logic) {//                     return ListTile(//                       title: Texts.fontSize14Normal(e.title,//                           color: Colours.titleColor),//                       trailing: e.countryCode == logic.countryCode//                           ? const Icon(Icons.check,//                               color: Colours.primaryColor)//                           : null,//                       onTap: () {//                         logic.changeLanguage(e.countryCode);//                       },//                     );//                   }))//               .toList())//       .toList(),// ),child: ListView.separated(itemBuilder: (context, index) {return _itemContent(context, index);},separatorBuilder: (_, index) => const Divider(),itemCount: Language.values.length),),);}Widget _itemContent(BuildContext context, int index) {return GetBuilder<MultiLanguageLogic>(builder: (logic) {return Container(padding: const EdgeInsets.symmetric(horizontal: 15),height: 44,child: GestureDetector(onTap: () {logic.changeLanguage(Language.values[index].countryCode);},child: Row(children: [Expanded(child: Texts.fontSize14Normal(Language.values[index].title,color: Colours.titleColor)),Visibility(visible:logic.countryCode == Language.values[index].countryCode,child: const Icon(Icons.check, color: Colours.primaryColor))],),),);});}
}

multi_language_logic.dart类

import 'package:brave_component/core/cache/helpers/cache_helper.dart';
import 'package:get/get.dart';import '../../../../../core/utils/language_utils.dart';class MultiLanguageLogic extends GetxController {late String countryCode;@overridevoid onInit() {super.onInit();countryCode = CacheHelper.countryCode;}void changeLanguage(String code) {countryCode = code;LanguageUtils.updateLocale(code);update();}
}

multi_language_binding.dart类


import 'package:get/get.dart';import 'multi_language_logic.dart';class MultiLanguageBinding extends Bindings {@overridevoid dependencies() {Get.lazyPut(() => MultiLanguageLogic());}
}

language.dart类

enum Language {fsLan(title: "跟随系统语言", countryCode: "fs-Lan"),zhCN(title: "简体中文", countryCode: "zh-CN"),zhHK(title: "繁体中文", countryCode: "zh-HK"),enUS(title: "English", countryCode: "en-US");final String title;final String countryCode;const Language({required this.title, required this.countryCode});
}

这里关于GetX的binding用法不会的可以参考Flutter 多语言、主题切换之GetX库！这个博主开发的GetX插件，生成模版代码提高研发效率，建议看看用起来。

持久化就不赘述了，参考源码

源码

上一篇多语言方案一：flutter_localizations 与 GetX 配合版