当应用程序关闭或在前台时，flutter get_storage 实例冲突

如何解决当应用程序关闭或在前台时，flutter get_storage 实例冲突

我正在为我的 Flutter 应用程序使用 GetX 和 get_storage。我的应用在 firebase_messaging 中按预期工作。

当应用程序处于后台时，我使用 get_storage 来保存当前消息，在尝试阅读消息列表的同时恢复（点击消息）时与进入后台之前相同。

重现步骤

打开应用
加载服务（包括 FCM）
转到前台
发送/接收消息保存到storage Key（可以看到storage 有消息）
轻点，恢复应用程序存储密钥列表看起来像以前一样后台

我假设我错过了一些反映存储变化的操作。我正手道歉，因为我真的不知道如何使代码尽可能可读。

主要

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await ServicesSer().dependencies();

  runApp(
    GetMaterialApp(
      title: "Application",initialRoute: AppPages.INITIAL,// showPerformanceOverlay: true,locale: TranslationService.locale,fallbackLocale: TranslationService.fallbackLocale,translations: TranslationService(),theme: theme.light,darkTheme: theme.dark,themeMode: await Get.find<StorageCtrl>().getSetting(
                settingKey: 'THEME',settingValue: 'light',) ==
              'light'
          ? ThemeMode.light
          : ThemeMode.dark,getPages: AppPages.routes,debugShowCheckedModeBanner: false,),);
}

服务

class ServicesSer extends Bindings {
  @override
  Future<void> dependencies() async {

    //storageCtrl
    await Get.putAsync<StorageCtrl>(() async {
      await GetStorage.init();
      final storageCtrl = StorageCtrl();
      await storageCtrl.storageCtrlInit();
      return storageCtrl;
    },permanent: true);

    //notifications
    await Get.putAsync<NotificationsCtrl>(() async {
      final notificationsCtrl = NotificationsCtrl();
      await notificationsCtrl.notificationsInit();
      return notificationsCtrl;
    },permanent: true);

    //firebase messaging init
    await Get.putAsync<FirebaseMessageSer>(() async {
      await Firebase.initializeApp();
      final firebaseMessengerSer = FirebaseMessageSer();
      await firebaseMessengerSer.firebaseMessageSerInit();
      return firebaseMessengerSer;
    },permanent: true);
  }
}

FirebaseMessageSer

class FirebaseMessageSer extends GetxService {
  NotificationsCtrl notificationsCtrl = Get.find<NotificationsCtrl>();
  late FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;

  @override
  Future<void> onInit() async {
    super.onInit();
  }

  @override
  void onReady() {
    super.onReady();
  }

  @override
  void onClose() {
    super.onClose();
  }

  Future<void> firebaseMessageSerInit() async {
    await FirebaseMessaging.instance
        .setForegroundNotificationPresentationOptions(
      alert: false,badge: false,sound: false,);
    ;

    FirebaseMessaging.instance.getInitialMessage().then((message) async {
      print('getInitialMessage');
    });

    FirebaseMessaging.onMessage.listen((message) {
      print('onMessage');
      notificationsCtrl.showNotification(message: message);
    });

    FirebaseMessaging.onMessageOpenedApp.listen((message) {
      print('onMessageOpenedApp');
      notificationsCtrl.showNotification(message: message);
    });

    FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);

    print(await FirebaseMessaging.instance.getToken());
  }
}

**//when app is closed or in foreground this function will handle notification**
Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  print('Handling a background message ${message.messageId}');

 ///most probably here is the issue,I need to initiate ctrls again as in foreground they are not longer in memory
 /// creating another instance of storage
 ///showNotification (bellow) saves the message to storage but when I resume the app
 /// the other instance of storage has not been updated
  Get.put(StorageCtrl());
  final notificationsCtrl = Get.put(NotificationsCtrl());
  notificationsCtrl.showNotification(message: message);
}

存储控制

class StorageCtrl extends GetxController {
  final GetStorage storage = GetStorage();

  @override
  Future<void> onInit() async {
    // await storage.erase();
    super.onInit();
  }

  @override
  void onReady() {
    super.onReady();
  }

  @override
  void onClose() {
    super.onClose();
  }

  Future<void> storageCtrlInit() async {
    await initTheme();
  }

  ///////////////////////////////////////////////////////////////////////
  ///THEME
  Future<void> initTheme() async {
    final userTheme = await getSetting(
      settingKey: 'THEME',);

    ///FIXME status bar on android has wrong color
    if (userTheme == 'light') {
      SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
        statusBarColor: lightPrimaryAppColor,));
      SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle.dark);
    } else {
      SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
        statusBarColor: darkPrimaryAppColor,));
      SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle.light);
    }
  }

  Future<void> changeTheme() async {
    final theme = Get.isDarkMode ? ThemeMode.light : ThemeMode.dark;

    setSetting(
      settingKey: 'THEME',settingValue: theme.toString().split('.')[1],);
    await initTheme();
    Get.changeThemeMode(theme);
  }

 
  ///////////////////////////////////////////////////////////////////////
  ///STORAGE
  /// settingValue will be a default value return if key is null
  dynamic getSetting(
      {required String settingKey,dynamic settingValue})  {
    final setting = storage.read(settingKey);
    return setting != null ? setting : settingValue;
  }

  Future<void> setSetting(
      {required String settingKey,dynamic settingValue}) async {
    await storage.write(settingKey,settingValue);
    print('settingKey: $settingKey - settingValue: $settingValue');
  }
}

通知Ctrl

我知道在使用存储时有很多异步，正在测试这是否可能有什么关系

Future<void> showNotification({required RemoteMessage message}) async {
    print('showNotification');

    final data = message.data;
    
    **//when on background,I can see that adding the message to the storage works as expected**
    await addRemoteMessage(message: message);

    NotificationDetails _notificationDetails;

    switch (data['notificationType']) {
      case 'bigImagePushNotification':
        _notificationDetails =
            await notificationDetailsBigImage(message: message);
        break;
      case 'smallImagePushNotification':
        _notificationDetails =
            await notificationDetailsTileImage(message: message);
        break;
      default:
        _notificationDetails = notificationDetailsNormal(message: message);
    }

    flutterLocalNotificationsPlugin.show(
      message.notification.hashCode,data['title'],data['excerpt'],_notificationDetails,payload: message.messageId,);
    
  }

Future<void> addRemoteMessage({
    required RemoteMessage message,}) async {
    final _message = MessageModel(
      message.messageId!,message.data['action'],message.data['id'],message.data['notificationType'],message.data['title'],message.data['excerpt'],message.data['featuredImage'],// DateTim.toIso8601String(),);

    var _messages = await getRemoteMessages();
    _messages.add(_message);

    await saveRemoteMessages(messages: _messages);
  }

Future<List<MessageModel>> getRemoteMessages() async {
    var messageList = <MessageModel>[];

    final list = await storageCtrl.getSetting(
      settingKey: 'MESSAGES',settingValue: <Map<String,dynamic>>[],);

    for (var _message in list) {
      messageList.add(MessageModel.fromJson(_message));
    }

    return messageList;
  }

Future<void> saveRemoteMessages({
    required List<MessageModel> messages,}) async {
    var _messagesList = <Map<String,dynamic>>[];

    for (var _message in messages) {
      _messagesList.add(json.decode(jsonEncode(_message)));
    }

    await storageCtrl.setSetting(
      settingKey: 'MESSAGES',settingValue: _messagesList,);
  }


Future onSelectNotification(String? payload) async {
    print('onSelectNotification');

    **/////When selected notification triggers app Resumes**
    ** //// but getRemoteMessage have the same list before going on background**

    final _message = await getRemoteMessage(messageId: (payload)!);
    await removeRemoteMessage(messageId: payload);
    await notificationHandler(
      message: _message,);
  }

我应该使用 Fenix 来重新创建 storageCtrl 吗？希望有更多经验的人可以指出我遗漏了什么，或者告诉我这是否是默认行为。

提前致谢

当应用程序关闭或在前台时，flutter get_storage 实例冲突

如何解决当应用程序关闭或在前台时，flutter get_storage 实例冲突

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