从Flutter的共享偏好中获取语言 [英] Get language from Shared Prefences in Flutter

问题描述

我想将当前语言保存在变量中，以便在其他页面中使用.我正在使用带有flutter_translate的shared_preferences.

I want to save the current language in a variable to use it in an other page. I'm using shared_preferences with flutter_translate.

在我的app.dart中，我有这个:

In my app.dart I have this :

class TranslatePreferences implements ITranslatePreferences
{
  static const String _selectedLocaleKey = 'selected_locale';

  @override
  Future<Locale> getPreferredLocale() async
  {
    final preferences = await SharedPreferences.getInstance();

    if(!preferences.containsKey(_selectedLocaleKey)) return null;

    var locale = preferences.getString(_selectedLocaleKey);
    return localeFromString(locale);

  }


  @override
  Future savePreferredLocale(Locale locale) async
  {
    final preferences = await SharedPreferences.getInstance();

    await preferences.setString(_selectedLocaleKey, localeToString(locale));

  }


}

如果我打印:

print(TranslatePreferences().getPreferredLocale());

我得到了:"Future< Locale>"的实例

如何管理它以获取getPreferredLocale()的值并将其存储在变量中?

How I can manage it to get the value of the getPreferredLocale() and store in a variable ?

谢谢

推荐答案

final Future<String> futureValue = Future.value("Hello !");

打印同步

void main() {
  futureValue.then((value) => print(value)); // Hello !
}

以 async

void main() async {
  final value = await futureValue;
  print(value); // Hello !
}

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