Add an option to automatically sync the current locale with the system locale

[bratan]

Add an option to automatically sync the current locale with the system locale.

So when the system locale is changed, the current/app locale will be reloaded as well (if supported).

Reference: #20

[diegoveloper]

Can you detect the language change in localeResolutionCallback then rebuild the LocalizationProvider ?

[bratan]

There are some issues preventing this from working currently but yes, I think this will be the way to go.

[doc-rj-celltrak]

Thanks for the great package, we may be using it in our app. Is this enhancement still planned?

[kuhnroyal]

@bratan Can you elaborate on why the flutter_device_locale package is needed. The same functionality and the syncing is available in plain Flutter via WidgetsBinding.instance.addObserver(...) or am I missing something?

[bratan]

@kuhnroyal - Because of some iOS issues where different values for the current/selected locale are returned depending on the environment (debug/release) and device type simulator/real device.

So by using flutter_device_locale the real locale is always used regardless of the environment.

More info:
flutter/flutter#14128
#15

[kuhnroyal]

@bratan Thanks, Right I now remember this issue. I though this is solved by adding the correct plist entries tho.

[diegoveloper]

@bratan what about doing this

    final currentLocale = WidgetsBinding.instance.window.locale;
    final locale = currentLocale != null && currentLocale.countryCode != null
        ? currentLocale
        : Localizations.localeOf(context);

to avoid using flutter_device_locale , btw any progress on this issue? thanks for this great package!

[doc-rj-celltrak]

Hi @bratan is there any update on this issue? Thanks.

[bratan]

Hi, there is no update currently as I`m quite busy these days, probably in the near future.

[doc-rj-celltrak]

If anyone wants to implement this themselves, you can use a WidgetsBindingObserver and override didChangeLocales(). Do this with a StatefulWidget below LocalizedApp and above MaterialApp.

When a system locale change is detected, you can do something like this:

    Future<void> _didChangeLocales(
    BuildContext context,
    List<Locale>? locales,
  ) async {
    if (locales != null && locales.isNotEmpty &&
        locales.first != LocalizedApp.of(context).delegate.currentLocale) {
      if (Platform.isAndroid) {
        Restart.restartApp();
      }
    }
  }

In my case, I'm restarting the app natively for Android, due to problems trying to force-rebuild the entire widget tree. I'm using the restart_app plugin to do that.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.