Android not receiving PushNotification when App is "closed"

Question

I'm using GCM Service for push notification, it's working fine when App is open or in backgourd, but when app is closed it's Crashing:

Exception:

FATAL EXCEPTION: main Process: br.com.siagri.SiagriAutorize, PID: 15786 android.runtime.JavaProxyThrowable: System.NotSupportedException: Could not activate JNI Handle 0xbeed8498 (key_handle 0xa7376b4) of Java type 'md5d8b390bb35897e87a51d1b4384dffa30/GcmService' as managed type 'SiagriAuth.Droid.Services.GcmService'. ---> System.InvalidOperationException: You MUST call Xamarin.Forms.Init(); prior to using it.

I have followed this tutorial and taked a look at this sample but i dont saw any about/diferent for notification works when the app is closed.

This is my method to recive and process the notification:

 private void CreateNotification(string title, string desc, string approvalCode)
        {
            try
            {
                //Create notification
                var notificationManager = GetSystemService(NotificationService) as NotificationManager;

                //Create an intent to show ui
                var uiIntent = new Intent(this, typeof(MainActivity));

                //Use Notification Builder
                var builder = new NotificationCompat.Builder(this);

                //Create the notification
                //we use the pending intent, passing our ui intent over which will get called
                //when the notification is tapped.
                var notification = builder.SetContentIntent(PendingIntent.GetActivity(this, 0, uiIntent, 0))
                        .SetSmallIcon(Resource.Drawable.icon)
                        .SetTicker(title)
                        .SetContentTitle(title)
                        .SetContentText(desc)
                        .SetPriority((int)NotificationPriority.High)
                        .SetDefaults((int)NotificationDefaults.Sound | (int)NotificationDefaults.Vibrate)
                        //Set the notification sound
                        .SetSound(RingtoneManager.GetDefaultUri(RingtoneType.Notification))
                        //Auto cancel will remove the notification once the user touches it
                        .SetAutoCancel(true).Build();
                //Show the notification

                int uniqueIdentifier = 0;
                for (int i = 0; i < approvalCode.Length; i++)
                {
                    uniqueIdentifier += (int)approvalCode[i];
                }
                notificationManager?.Notify(uniqueIdentifier, notification);
            }
            catch (Exception e)
            {
                Debug.WriteLine(e);
                App.LocalAlert("Erro", "Erro ao criar notificação.");
            }
        }

        protected override void OnMessage(Context context, Intent intent)
        {
            try
            {
                if (intent != null && intent.Extras != null)
                {
                    var messageText = intent.Extras.GetString("message");
                    var approvalCode = intent.Extras.GetString("ApprovalCode");
                    if (!string.IsNullOrEmpty(messageText) && !string.IsNullOrEmpty(approvalCode))
                        CreateNotification($"Solicitação - {approvalCode}", messageText, approvalCode);
                }
            }
            catch (Exception e)
            {
                Debug.WriteLine(e);
                App.LocalAlert("Erro", "Erro ao criar notificação.");
            }
        }

I'm using these assembly:

[assembly: Permission(Name = "myProject.permission.C2D_MESSAGE")]
[assembly: UsesPermission(Name = "myProject.permission.C2D_MESSAGE")]
[assembly: UsesPermission(Name = "com.google.android.c2dm.permission.RECEIVE")]
[assembly: UsesPermission(Name = "android.permission.INTERNET")]
[assembly: UsesPermission(Name = "android.permission.WAKE_LOCK")]
[assembly: UsesPermission(Name = "android.permission.GET_ACCOUNTS")]

And these IntentFilter:

 [BroadcastReceiver(Permission = Constants.PERMISSION_GCM_INTENTS)]
    [IntentFilter(new[] { Constants.INTENT_FROM_GCM_MESSAGE }, Categories = new[] { "br.com.siagri.SiagriAutorize" })]
    [IntentFilter(new[] { Constants.INTENT_FROM_GCM_REGISTRATION_CALLBACK }, Categories = new[] { "br.com.siagri.SiagriAutorize" })]
    [IntentFilter(new[] { Constants.INTENT_FROM_GCM_LIBRARY_RETRY }, Categories = new[] { "br.com.siagri.SiagriAutorize" })]

Any idea of how to make this works for closed apps?

Obs.: I'm already running the app in release mode.

**`i'm gotting an error message`** And what is the error message? — SushiHangover, Jan 18 '18 at 13:11
hi @SushiHangover sory for saying that i got a erro message, the app is crashing. i provider a image. — Pedro Franco, Jan 18 '18 at 13:49
Review the `logcat` for details of the crash and is it crashing during the local notification creation or when the use taps on the notification? — SushiHangover, Jan 18 '18 at 14:00
I don't know where it's crashing cause its closed so i cant debug, and when i run in debug mode, background and open, work fine. @SushiHangover — Pedro Franco, Jan 18 '18 at 15:41
Review the `logcat` for details and/or implmenent a crash reporter — SushiHangover, Jan 18 '18 at 21:59
What is the `SIAGRI Autorize parou`? ANR? Please add [UncaughtExceptionHandler](https://developer.android.com/reference/java/lang/Thread.UncaughtExceptionHandler.html) to get the exception. If it is ANR, please use `adb pull /data/anr/traces.txt` to get the traces file, and edit your question. — Robbit, Jan 19 '18 at 07:20
@JoeLv SIAGRI Autorize is the name of my aplication, and "parou" is stop in portuguese. I don't know how to get exception in this case cause when the application is close i cant debug. — Pedro Franco, Jan 19 '18 at 10:41
Please try [`UnacughtExceptionHanlder`](https://stackoverflow.com/questions/39668236/how-to-properly-write-a-custom-uncaughtexceptionhandler-in-xamarin-android) — Robbit, Jan 19 '18 at 10:43
Visual Studio->tools->Android->Android Device Monitors, select your phone, you will see the log in console. — Robbit, Jan 19 '18 at 10:49
`You MUST call Xamarin.Forms.Init(); prior to using it.`, Xamarin.Forms project? — Robbit, Jan 19 '18 at 11:22
[Have you seen this?](https://stackoverflow.com/questions/10593022/monodroid-error-when-calling-constructor-of-custom-view-twodscrollview/10603714#10603714) maybe you need adjust the code order — Robbit, Jan 19 '18 at 11:33
I don't, but i solve the problema, i was trying to access Database, instantiating my repository on GcmService constructor. Thank's @JoeLv u help me a lot. — Pedro Franco, Jan 19 '18 at 11:43

score 2 · Accepted Answer · answered Jan 19 '18 at 16:31

My error was in the construct of GcmService, i was instantiating my repository there, so i was trying to access the database, i just remove from constructor and put on my registered method, that was where i used it.

 public GcmService() : base(PushHandlerBroadcastReceiver.SenderIds)
    {
        Log.Info(PushHandlerBroadcastReceiver.Tag, "PushHandlerService() constructor");
        _permissaoRepository = new PermissaoRepository(App.SiagriAuthContext);
        _loginRepository = new LoginRepository(App.SiagriAuthContext);
    }

I changed to:

public GcmService() : base(PushHandlerBroadcastReceiver.SenderIds)
    {
        Log.Info(PushHandlerBroadcastReceiver.Tag, "PushHandlerService() constructor");
    }

So i can't access my database when the app is closed, this is quite reasonable. I have make a quick search of try to use database when app is closed but i dont found, but here and here have something about use local database.

Android not receiving PushNotification when App is "closed"

1 Answers1