Getting BuildContext in Flutter for localization

Question

I try to localize a String in Flutter with the localization package. The problem is the location where my translation is needed. It is not related to the UI, rather it is somewhere deep in my model, where I don't have access to a BuildContext. Is there any other possibility to still make use of the translation function?

// I don't have a context variable here
MyLocalizations.of(context).trans("foo")

Answer 1

Yes there is. You don't need BuildContext to access strings. Here is my solution:

class Strings {
  Strings._(Locale locale) : _localeName = locale.toString() {
    current = this;
  }

  final String _localeName;

  static Strings current;

  static Future<Strings> load(Locale locale) async {
    await initializeMessages(locale.toString());
    final result = Strings._(locale);
    return result;
  }

  static Strings of(BuildContext context) {
    return Localizations.of<Strings>(context, Strings);
  }

  String get title {
    return Intl.message(
      'Hello World',
      name: 'title',
      desc: 'Title for the Demo application',
    );
  }
}

Future<Null> main() async {
  final Locale myLocale = Locale(window.locale);
  await Strings.load(myLocale);
  runApp(MyApplication());
}

Now you can reference a string as follows:

final title = Strings.current.title;