我想将当前语言保存在变量中,以便在其他页面中使用它。我正在使用带有flutter_translate的shared_preferences。
在我的app.dart中,我有这个:
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:Instance of 'Future<Locale>'
如何管理它以获取getPreferredLocale()的值并将其存储在变量中?
谢谢
final Future<String> futureValue = Future.value("Hello !");
在同步中打印将来的值
void main() {
futureValue.then((value) => print(value)); // Hello !
}
在异步中打印将来的值
void main() async {
final value = await futureValue;
print(value); // Hello !
}