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 somewh

Answer 1

I am not sure if i did it right (from performance point of view) and maybe someone can comment on this but i have rx BehaviorSubject in my AppLocalization and fire event once new locales are loaded. I am listening to it in my main.dart and doing setState on receiving an event. I checked performance tab but did not noticed any big changes in it once comparing my method vs accessing translations through context (inherited widget).

Answer 2

No, there is no other way because it is stored using an InheritedWidget, which is a part of the build tree and thus can only be accessed with a reference to it (the BuildContext).
You will need to pass your context to somewhere deep in your model.

Answer 3

I know this question is dated way back. But I came across this issue when implementing my application, and I dont see any "nice" way to handle it. So here is my approach

class LanguageService {
  static String defaultLanguage = 'en';

  static Map<String, Map<String, String>> _localizedValues = {
    'en': {
      'title': 'Storefront',
      'language': 'Language',
      'googleLogin': 'Login with Google'
    },
    'vn': {
      'title': 'Cửa hàng',
      'language': 'Ngôn ngữ',
      'googleLogin': 'Đăng Nhập với Google'
    }
  };

  static set language(String lang) {
    defaultLanguage = lang;
  }

  static String get title {
    return _localizedValues[defaultLanguage]['title'];
  }

  static String get language {
    return _localizedValues[defaultLanguage]['language'];
  }

  static String get googleLogin {
    return _localizedValues[defaultLanguage]['googleLogin'];
  }

}

Now you can reference a string as follows:

String title = LanguageService.title;

You can find the detailed tutorial here

Answer 4

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;