（1） yaml文件添加依賴
dependencies:
flutter:
sdk: flutter
flutter_localizations:
sdk: flutter
（2） 創(chuàng)建類文件：數(shù)據(jù)類
class YYYLocalizations {
YYYLocalizations(this.locale);
Locale? locale;
static YYYLocalizations of(BuildContext context) {
return Localizations.of(context, YYYLocalizations);
}
/// 國(guó)際化數(shù)據(jù)data字典
Map<String, Map<String, String>> data = {};
/// 從json中加載數(shù)據(jù)
Future<void> loadI18nJson() async {
String path = "assets/json/i18n.json";
final result = await rootBundle.loadString(path);
Map<String, dynamic> dataDict = json.decode(result);
data = dataDict.map((key, value) {
return MapEntry(key, value.cast<String, String>());
});
}
/// 手寫(xiě)對(duì)應(yīng)字段的get方法
String? get title1 {
return data[locale?.languageCode]?["title1"];
}
String? get title2 {
return data[locale?.languageCode]?["title2"];
}
String? get title3 {
return data[locale?.languageCode]?["title3"];
}
String? get title4 {
return data[locale?.languageCode]?["title4"];
}
String? get title5 {
return data[locale?.languageCode]?["title5"];
}
}
（3） 創(chuàng)建類文件：代理delegate類
class YYYLocalizationDelegate extends LocalizationsDelegate<YYYLocalizations> {
static YYYLocalizationDelegate delegate = YYYLocalizationDelegate();
/// 支持的語(yǔ)言編碼
@override
bool isSupported(Locale locale) {
return ["zh", "en"].contains(locale.languageCode);
}
/// 加載國(guó)際化數(shù)據(jù)并返回
@override
Future<YYYLocalizations> load(Locale locale) async {
YYYLocalizations localizations = YYYLocalizations(locale);
await localizations.loadI18nJson(); //異步加載數(shù)據(jù)
return localizations;
//return SynchronousFuture(YYYLocalizations(locale)); //同步本地?cái)?shù)據(jù)
}
/// 是否重新加載數(shù)據(jù)資源
@override
bool shouldReload(covariant LocalizationsDelegate<YYYLocalizations> old) {
return false;
}
}
（4） MaterialApp中進(jìn)行配置
MaterialApp(
supportedLocales: [
Locale('zh'),
Locale("en"),
],
localizationsDelegates: [
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
GlobalCupertinoLocalizations.delegate,
YYYLocalizationDelegate.delegate, //手動(dòng)創(chuàng)建的
],
);
（6） 不同界面中獲取國(guó)際化配置的內(nèi)容
YYYLocalizations.of(context).bottomBarTitle1;
YYYLocalizations.of(context).bottomBarTitle2;
YYYLocalizations.of(context).bottomBarTitle3;
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