Cyberlander Cyberlander - 5 months ago 117
Android Question

Firebase Cloud Messaging: No Token and strange notification behavior

I have a Problem with Firebase Cloud Messaging:
I implemented a little App with the 2 extended Services FirebaseInstanceIdService and FirebaseMessagingService.

If I start the application and send a notification via
Firebase Console, I get the notification on my device.
Everything works.
If I open the App again, it hangs up and produces a black
screen. There is no output on the Android Studio console then.
I also don't get a second notification from Firebase console.
Then I get a Dialog: "The Application does not react etc"
After opening the app again it works fine again.

I also do not get an Token in the Logcat (?)

Firebase InstanceIdService:

public class InstanceIdService extends FirebaseInstanceIdService
{
private static final String TAG = "InstanceIdService";

@Override
public void onTokenRefresh()
{
String token = FirebaseInstanceId.getInstance().getToken();
Log.e(TAG, "!!!!!!!!!!!!!!!!!! Got token: " + token);
}
}


FirebaseMessagingService:

public class MyFirebaseMessagingService extends FirebaseMessagingService
{
@Override
public void onMessageReceived(RemoteMessage remoteMessage)
{
sendNotification(remoteMessage);
}

public void sendNotification(RemoteMessage remoteMessage)
{
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,PendingIntent.FLAG_ONE_SHOT);

Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setContentTitle(remoteMessage.getFrom())
.setContentText(remoteMessage.getNotification().getBody())
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent);
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notificationBuilder.build());
}
}


The only errors on the Android Studio Console is
"Failed to load module descriptor class" but that is
a known bug.

I hope you can help me.

Best Regards,
Felix

EDIT: error message From the Firebase console:

Exception java.lang.RuntimeException: Parcel android.os.Parcel@4215be98: Unmarshalling unknown type code 1936206469 at offset 68
android.os.Parcel.readValue (Parcel.java:2087)
android.os.Parcel.readArrayMapInternal (Parcel.java:2321)
android.os.Bundle.unparcel (Bundle.java:249)
android.os.Bundle.getString (Bundle.java:1118)
com.google.firebase.messaging.FirebaseMessagingService.zzT ()
com.google.firebase.messaging.FirebaseMessagingService.zzm ()
com.google.firebase.iid.zzb$2.run ()
java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1112)
java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:587)
java.lang.Thread.run (Thread.java:841)

Answer

I also do not get an Token in the Logcat (?)

onTokenRefresh() method is called when generating a new token for you. It is not called everytime you open the app. However you can get the token using FirebaseInstanceId.getInstance().getToken();

If I start the application and send a notification via Firebase Console, I get the notification on my device. Everything works. If I open the App again, it hangs up and produces a black screen.

I faced a similar issue, this generally happens if you have no or slow internet connection. No solution yet. :(

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