`locale` resets after closing and opening the app

[baimamboukar]

Describe the bug

My active locale resets when I close and reopen the app.

• I'm persisting my rawLocale 'fr', 'en', and 'de' using hydrated_bloc
• The raw locale is being persisted pretty fine
• But when I close and reopen the app, the active locale resets itself and goes to fallback locale, which is 'en', Meanwhile my persisted raw locale is pretty fine

This is my app.dart

BlocBuilder<ThemeCubit, bool>(
        builder: (BuildContext context, bool isDarkMode) {
          return BlocBuilder<LanguageCubit, String>(
            builder: (context, lang) {
              return MaterialApp.router(
                theme: theme.toThemeData(Brightness.light),
                //theme: FlexThemeData.light(scheme: FlexScheme.hippieBlue),
                darkTheme: theme.toThemeData(Brightness.dark),
                themeMode: isDarkMode ? ThemeMode.dark : ThemeMode.light,
                localizationsDelegates: AppLocalizations.localizationsDelegates,
                supportedLocales: AppLocaleUtils.supportedLocales,
                locale: Locale(lang), // was TranslationProvider.of(context).flutterLocale
                routerConfig: _router.config(
                  navigatorObservers: () => <NavigatorObserver>[
                    FirebaseAnalyticsObserver(
                      analytics: FirebaseAnalytics.instance,
                    ),
                    EliteRouterObserver(),
                  ],
                ),
                debugShowCheckedModeBanner: false,
              );
            },
          );
        },
      ),

This is how I wrapped my MaterialApp widget with TranslationProvider

await runZonedGuarded(
    () async => runApp(
      TranslationProvider(
        child: await builder(),
      ),
    ),
    (error, stackTrace) => log(error.toString(), stackTrace: stackTrace),
  );

To Reproduce
Steps to reproduce the behavior:

1. Wrap material with TranslationProvider
2. use TranslationProvider.of(context)flutterLocale as MaterialApp locale's attribute
3. Persist your locale
4. Trigger interaction that changes active locale
5. The locale is changed

Expected behavior
The locale changes and updates screen, but when you close and reopen app, the locale is reset and goes to fallback locale

[Tienisto]

Please provide a minimal example so we are sure that the bug is in the library and not in your application code.

The official example works when we minimize and resume the app.

If you don't mean resume but actually "start", then check if LocaleSettings.setLocaleRaw works. If it works, then the library part is done. Possible errors are LocaleSettings.setLocaleRaw doesn't get called or get called with a wrong value.

[Tienisto]

Closed due to inactivity.