Flutter国际化

目录

效果演示

实现步骤

1.添加Flutter Intl插件

2.初始化项目

在Android Studio中点击Tools->Flutter Intl->Initialize for the Project

会生成如下这些文件

3.添加语言

在Android Studio中点击Tools->Flutter Intl->Add Locale

添加完之后会生成新添加的文件

4.增加多语言字段

在上面生成的文件中增加字段即可，这里我只加了英语和中文
intl_en.arb

{
  "hello": "hello",
  "confirm": "confirm",
  "cancel": "cancel"
}

intl_zh.arb

{
  "hello": "你好",
  "confirm": "确认",
  "cancel": "取消"
}

5.增加配置

在main.dart中增加如下配置

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      // =============增加的===============
      supportedLocales: S.delegate.supportedLocales,
      localizationsDelegates: const [
        // ... app-specific localization delegate[s] here
        S.delegate,
        GlobalMaterialLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate
      ],
    // =============增加的===============
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

6.增加切换语言页面

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);
  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: ListView.builder(
            itemCount: 3,
            itemExtent: 50,
            itemBuilder: (BuildContext context, int index){
              if(index == 1){
                return GestureDetector(
                  onTap: (){
                    S.load(Locale.fromSubtags(languageCode: 'zh'));
                    setState(() {

                    });
                  },
                  child: ListTile(title: Text("中文")),
                );
              }else if(index == 2){
                return GestureDetector(
                  onTap: (){
                    S.load(Locale.fromSubtags(languageCode: 'en'));
                    setState(() {

                    });
                  },
                  child: ListTile(title: Text("英语")),
                );
              }
              return ListTile(title: Text(S.of(context).hello));
            }
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: (){
          _incrementCounter();
        },
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

这里切换语言的关键代码如下：

S.load(Locale.fromSubtags(languageCode: 'en'));
//切换完更新下状态
setState(() {

});

案例源码

https://gitee.com/itfitness/flutter-multilingual