This SDK enables access to the PubNub Mobile Push Gateway for Android applications. PubNub allows you to deliver APNS and/or GCM push notifications for connections to the PubNub network, to receive published messages in realtime. The Mobile Push Gateway add-on provides a way to fall back to APNS and/or GCM push notifications. PubNub is a Push technology intended specifically for high-message-volume applications and games. It is a cloud-based, real-time messaging service for mobile phones, tablets, TVs, HTML5 web browsers and game consoles.