Flutter开发之——国际化支持

import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n.dart';
 
void main() => runApp(MyApp());
 
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
      localizationsDelegates: AppLocalizations.localizationsDelegates,
      supportedLocales: AppLocalizations.supportedLocales,
    );
  }
}
 
class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);
 
  final String title;
 
  @override
  _MyHomePageState 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: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(AppLocalizations.of(context)!.helloWorld),
            Text('You have pushed the button this many times:'),
            Text('$_counter', style: Theme.of(context).textTheme.headline4),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

这段代码示例展示了如何在Flutter应用中添加国际化支持。首先，在main函数中启动应用，并构建一个MaterialApp。在MaterialApp中，我们设置了本地化代理和支持的地区列表。在主页MyHomePage中，我们使用AppLocalizations.of(context)!.helloWorld来获取国际化字符串。这样，只要设备的语言设置与支持的语言匹配，就会显示对应语言的文本。