InstanceIDService.java

package com.couchbase.gcmexample;

import com.google.firebase.iid.FirebaseInstanceIdService;

public class InstanceIDService extends FirebaseInstanceIdService {

    private static final String TAG = "MyFirebaseIIDService";

    @Override
    public void onTokenRefresh() {
        // Get updated InstanceID token.
        // String refreshedToken = FirebaseInstanceId.getInstance().getToken();
        // Log.d(TAG, "Refreshed token: " + refreshedToken);

        // If you want to send messages to this application instance or
        // manage this apps subscriptions on the server side, send the
        // Instance ID token to your app server.
    }
}