app does not load on device language

[moosalim]

Hello

THanks for the code,

I have noticed the the app does always load on english language. is there a way to make the app load based on device language when open for first time. Then the users can change the language if they want from the drop down menu

[podcoder]

Hello dear,
localeResolutionCallback should do the work.

  Locale _locale ;
 Widget build(BuildContext context) {
  
    return MaterialApp(
        debugShowCheckedModeBanner: false,
        title: "Flutter Localization Demo",
        theme: ThemeData(primarySwatch: Colors.blue),
        locale: _locale,
        supportedLocales: [
          Locale("en", "US"),
          Locale("fa", "IR"),
          Locale("ar", "SA"),
          Locale("hi", "IN")
        ],
        localizationsDelegates: [
          DemoLocalization.delegate,
          GlobalMaterialLocalizations.delegate,
          GlobalWidgetsLocalizations.delegate,
          GlobalCupertinoLocalizations.delegate,
        ],
        localeResolutionCallback: (deviceLocal, supportedLocales) {
          for (var supportedLocale in supportedLocales) {
            if (supportedLocale.languageCode == deviceLocal.languageCode &&
                supportedLocale.countryCode == deviceLocal.countryCode) {
                _locale = deviceLocale // This should do the trick, but I haven't tested
              return supportedLocale;
            }
          }
          return supportedLocales.first;
        },
        onGenerateRoute: CustomRouter.generatedRoute,
        initialRoute: homeRoute,
      );
  }