How to handle FirebaseInstanceId.getInstance().getToken() = null

Question

I have just migrated to FCM. I have added my class that extends from FirebaseInstanceIdService to receive a refreshedToken as and when appropriate.

My question is sp

Answer 1

depending on your application logic you can write the code to handle the "new" token directly in the FirebaseInstanceIdService.onTokenRefresh() method, or you can use a LocalBroadcast to send this information to your activity if you need to change the UI when this event happens.

Note that when onTokenRefresh() is called your activity could be closed.

A possible implementation could a mix of the two options:

1. add some logic in onTokenRefresh() to send the token to your server
2. use a LocalBroadcastReceiver to inform your activity, if you have a piece of UI that need to change when the token is available.