FirebaseInstanceId.getInstance().deleteInstanceId(); throw java.io.IOException: SERVICE_NOT_AVAILABLE in offline

Question

I want to unsubscribe from firebase push notification when user logout from application.

For it I use FirebaseInstanceId.getInstance().deleteInstanceId();

It works when the device have internet connection. If the device does not have internet connection "java.io.IOException: SERVICE_NOT_AVAILABLE" is occurred.

How correct unsubscribe from push notification if device doesn't have internet connection ?

Answer 1

From the Firebase documentation :

To unsubscribe, the client app calls Firebase Cloud Messaging unsubscribeFromTopic() with the topic name.

If there is no internet connection, this will queue up the unsubscribe until the client is connected again.