How to Save a FCM token in Android?

Question

I am following this to register my deivce in Firebase

Here I am trying to display and save the notification token

    public class MyFirebaseInstance         


        

Answer 1

May be it takes some time to generate token. If you don't get it you can generate it as follow: (Reference:https://firebase.google.com/docs/cloud-messaging/android/client?authuser=0)

 FirebaseInstanceId.getInstance().getInstanceId()
                    .addOnCompleteListener(new OnCompleteListener() 
 {
                        @Override
                        public void onComplete(@NonNull Task task) 
   {
                            if (!task.isSuccessful()) {
                                Log.w(TAG, "getInstanceId failed", 
                                task.getException());
                                return;
                            }

                            // Get new Instance ID token
                            String token = task.getResult().getToken();
                            //Here you will surely get the token so store it in 
                            //sharedpreference for future use

                        }
 });