Flutter：应用程序的语言环境不受其所有本地化委托的支持

Question

您好，我正在尝试在flutter应用程序中添加BottomNavigationBar，但是当我运行项目时发生错误：

A MaterialLocalizations delegate that supports the ka_GE locale was not found

这是我的应用程序代表：

  supportedLocales: [
    const Locale('en', 'US'),
    const Locale('ka', 'GE'),
    const Locale('ru', 'RU'),
  ],
  localizationsDelegates: [
    const InfosLocalizationsDelegate(),
    GlobalMaterialLocalizations.delegate,
    GlobalWidgetsLocalizations.delegate
  ],
  locale: Locale('ka')

这是Custom LocalizationsDelegate：

class CLocalizationsDelegate
    extends LocalizationsDelegate<CLocalizations> {
  const CLocalizationsDelegate();

  @override
  bool isSupported(Locale locale) =>
      ['en', 'ka', 'ru'].contains(locale.languageCode);

  @override
  Future<CLocalizations> load(Locale locale) async {
    CLocalizations localizations = new CLocalizations(locale);
    await localizations.load();
    print("Load ${locale.languageCode}");
    return localizations;
  }

  @override
  bool shouldReload(CLocalizationsDelegate old) => false;
}

是的，我知道问题是“ ka”，因为MaterialLocalizations不支持该问题，但我必须解决该问题，所以你们可以帮我吗？

Answer 1

将GlobalCupertinoLocalizations也添加到 localizationsDelegates 中也可以解决这个问题。

return MaterialApp(
  localizationsDelegates: const [
    GlobalMaterialLocalizations.delegate,
    GlobalWidgetsLocalizations.delegate,
    GlobalCupertinoLocalizations.delegate,
  ],
  // ...
);

Answer 2

您可以实现自定义MaterialLocalizations委托

class MaterialLocalizationKaDelegate extends LocalizationsDelegate<MaterialLocalizations> {
  @override
  bool isSupported(Locale locale) {
    return locale.countryCode == "GE" && locale.languageCode == "ka";
  }

  @override
  Future<MaterialLocalizations> load(Locale locale) async {
    return MaterialLocalizationKa();
  }

  @override
  bool shouldReload(Foo old) {
    return false;
  }
}

class MaterialLocalizationKa extends MaterialLocalizations {
  // TODO: implement KA localization yourself
}