Push Notifications in Android Platform

Question

I am looking to write an app that receives pushed alerts from a server. I found a couple of methods to do this.

1. SMS - Intercept the incoming SMS and initiate

Answer 1

C2DM: your app-users must have the gmail account.

MQTT: when your connection reached to 1024, it will stop work because of it used "select model " of linux.

There is a free push service and api for android, you can try it: http://push-notification.org