First I created the GetxController class

  final languageController = GetStorage();

  var myLocal = [];

  void saveLocale(List list) {
    languageController.write('savedLocale', list);
  }

  @override
  void onInit() {
    List<dynamic>? savedLocale = languageController.read('savedLocale');
    if (savedLocale != null) {
      myLocal = savedLocale;
    }
    super.onInit();
  }
}

Then I initialized GetStorage in main.dart

final myLocal = LanguageController().myLocal;

void main() async {
  print(myLocal);
  await GetStorage.init();

  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      translations: LocaleString(),
      locale: myLocal.isNotEmpty
          ? Locale(myLocal[0], myLocal[1])
          : Locale('en', 'US'),
      debugShowCheckedModeBanner: false,
      home: HomeScreen(),
    );
  }
}

And then in the dialog after setting the locale I writes it in storage

Future<dynamic> myMaterialDialog(BuildContext context) {
  final LanguageController languageController = Get.find();

  return showDialog(
      context: context,
      builder: (context) {
        return AlertDialog(
          title: Text(chooseLanguage.tr),
          content: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              TextButton(
                onPressed: () {
                  Get.back();
                  Get.updateLocale(Locale('en', 'US'));
                  languageController.saveLocale(['en', 'US']);
                },
                child: Text(englishLanguage.tr),
              ),
              TextButton(
                onPressed: () {
                  Get.back();
                  Get.updateLocale(Locale('ru', 'RU'));
                  languageController.saveLocale(['ru', 'RU']);
                },
                child: Text(russianLanguage.tr),
              ),
            ],
          ),
        );
      });
}

And it's not working, every time I restarted my app it's shows 1 what myLocale is empty

To check if saveLocale() method is working, I created printSavedLocale() method

 void printSavedLocale() {
    print(languageController.read('savedLocale'));
  }

and put it to dialoge button after saveLocale() and it's printing my saved locale, but after restarting saved locale is null

CodePudding user response：

use this static methods. put them anywhere in your project:

void setData(String key, dynamic value) => GetStorage().write(key, value);

int? getInt(String key) => GetStorage().read(key);

String? getString(String key) => GetStorage().read(key);

bool? getBool(String key) => GetStorage().read(key);

double? getDouble(String key) => GetStorage().read(key);

dynamic getData(String key) => GetStorage().read(key);

void clearData() async => GetStorage().erase();

CodePudding user response：

I can solove this by reading from the storage directly from main.dart

final LanguageController languageController = Get.put(LanguageController());
final myLocal = LanguageController().readSavedLocale();

void main() async {
  await GetStorage.init();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      translations: LocaleString(),
      locale: myLocal.isNotEmpty
          ? Locale(myLocal[0], myLocal[1])
          : Locale('en', 'US'),
      debugShowCheckedModeBanner: false,
      home: HomeScreen(),
    );
  }
}

And readSavedLocale() method is

List readSavedLocale() {
    var savedLocale = languageController.read('savedLocale');
    return savedLocale;
  }