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OnNotificationOpened called every time App is launched on Android, without tapping notifications, Xamarin Forms

See original GitHub issue

๐Ÿ› Bug Report


In release build, whenever I launch my App by tapping its icon, the CrossFirebasePushNotification.Current.OnNotificationOpened is fired even though no notification has been tapped on or received. This does not happen while debugging the app. However, If I stop debugging, and just tap the debug build version of the App and it opens, still the same event is fired. Only when connected to Visual Studio and started in debug mode from there is the event not fired.

Plugin.FirebasePushNotification version 3.3.13-beta (tried version 3.3.10 but still the same) Xamarin Forms v4.6.0.616-pre4


    public class MainApplication : Application
        protected MainApplication(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)

        public override void OnCreate()
              //Set the default notification channel for your app when running Android Oreo
	        if (Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.O)
		        //Change for your default notification channel id here
		        FirebasePushNotificationManager.DefaultNotificationChannelId = "DefaultChannel";

		        //Change for your default notification channel name here
		        FirebasePushNotificationManager.DefaultNotificationChannelName = "General";

            FirebasePushNotificationManager.NotificationActivityType = typeof(MainActivity);
            //If debug you should reset the token each time.

            CrossFirebasePushNotification.Current.OnNotificationOpened += async (s,p) =>
                Toast.MakeText(Application.Context, "Why on earth is this toast appearing when i just launched the app normally", ToastLength.Short).Show();





     protected override void OnNewIntent(Intent intent)

 protected override void OnCreate(Bundle savedInstanceState)

            FormsAppCompatActivity.ToolbarResource = Resource.Layout.Toolbar;
            FormsAppCompatActivity.TabLayoutResource = Resource.Layout.Tabbar;


            // Inicializando FFImageLoading
            FFImageLoading.Forms.Platform.CachedImageRenderer.Init(enableFastRenderer: true);
            var config = new Configuration
                ExecuteCallbacksOnUIThread = false,
                HttpClient = new HttpClient(new AndroidClientHandler() 
                    AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate, 

            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);

            // Inicializando Xamarin.Essentials
            Xamarin.Essentials.Platform.Init(this, savedInstanceState);

            LoadApplication(new App());



What am I missing?


  • ๐Ÿ“ฑ iOS
  • [X ] ๐Ÿค– Android
  • ๐Ÿ WPF
  • ๐ŸŒŽ UWP
  • ๐ŸŽ MacOS
  • ๐Ÿ“บ tvOS
  • ๐Ÿ’ Xamarin.Forms

Issue Analytics

  • State:open
  • Created 3 years ago
  • Reactions:1
  • Comments:8

github_iconTop GitHub Comments

devpersoncommented, Nov 17, 2022

Itโ€™s better to move to Xamarin OneSignal

thomasgallikercommented, Nov 18, 2022

Guys, I might have found a solution for this problem. It seems as Android recycles the Intent which launched an Activity (and with the Intent it recycles the Extras in it). I tested several scenarios and it looks like the following code can be used in OnCreate an OnNewIntent (instead of just calling FirebasePushNotificationManager.ProcessIntent):

private static void CheckAndProcessIntent(Activity activity, Intent intent)
    var launchedFromHistory = intent.Flags.HasFlag(ActivityFlags.LaunchedFromHistory);
    if (!launchedFromHistory)
        FirebasePushNotificationManager.ProcessIntent(activity, intent, enableDelayedResponse: false);

Is this something, they should integrate into this plugin? Or anyone still doing maintenance here?

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