Source code to Implement push notification for Sending and Receive messages via GCM for Android Studio

GCM Model Diagram

Send a message using GCM HTTP connection server protocol:

  https://gcm-http.googleapis.com/gcm/send

Content-Type:application/json

Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA

{

    "to": "/topics/foo-bar",

    "data": {

      "message": "This is a GCM Topic Message!",

     }

  }

Handle a downstream message on an Android device:

  @Override

  public void onMessageReceived(String from, Bundle data) {

     String message = data.getString("message");

     Log.d(TAG, "From: " + from);

     Log.d(TAG, "Message: " + message);

     // Handle received message here.

  }