class to access registration token

MyInstanceIdService.java

package com.cb.androidwarriorfcmdemo;

import android.util.Log;
import com.google.firebase.iid.FirebaseInstanceId;
import com.google.firebase.iid.FirebaseInstanceIdService;

/**
 * Created by kundan on 1/26/2017.
 */

public class MyInstanceIdService extends FirebaseInstanceIdService {

    @Override
    public void onTokenRefresh() {
        super.onTokenRefresh();
        
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
        Log.d("fcmtoken", "Refreshed token: " + refreshedToken);
    }
}