package com.example.smartnotices;

import android.util.Log;

import com.example.smartnotices.R;
import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;

public class MyFireBaseMessagingService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Log.e("ISSERVICESTARTED????", "no idea right now");
        super.onMessageReceived(remoteMessage);
        if(remoteMessage.getNotification() != null){
            String title = remoteMessage.getNotification().getTitle();
            String body = remoteMessage.getNotification().getBody();
            NotificationHelper.displayNotification(getApplicationContext(),title,body);
        }
    }
}

package com.example.smartnotices;

import android.app.NotificationManager;
import android.content.Context;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.NotificationManagerCompat;

import com.example.smartnotices.R;

public class NotificationHelper {
    public  static void displayNotification(Context context, String title, String body){
        NotificationCompat.Builder mBuilder =
                new NotificationCompat.Builder(context, "notification_channel")
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setContentText(body)
                        .setContentTitle(title)
                        .setPriority(NotificationCompat.PRIORITY_DEFAULT);
        NotificationManagerCompat mNotificationMgr = NotificationManagerCompat.from(context);
        mNotificationMgr.notify(0 /* ID of notification */, mBuilder.build());
    }
}