The Quickblox Android SDK by Quickblox offers a transition guide of versions along with references to run samples on Android Studio and Eclipse. Push notifications, simple Android custom objects, and simple Android chat are some of the examples available with images and code.
The Internet runs on standards. Without standards, we wouldn't have the Domain Name System (DNS) which resolves hostnames to Internet Protocol (IP) addresses, or the HyperText Transfer Protocol (HTTP) which served up this very web page. Even web service APIs, which can vary wildly depending on the back-end service, depend on standards like XML and JSON to make third-party development possible. And now, the W3C is jumping into the fray with a Working Draft for a general webapp Push API.
Urban Airship, the most globally deployed mobile push messaging service, has announced three new world-class events will utilize its push messaging platform to keep attendees and viewers more engaged than ever before. The Bonnaroo Music and Arts Festival, the 60th annual Cannes Lions International Festival of Creativity, and the 127th Wimbledon Championships will all use Urban Airship for feature rich mobile apps and push messaging to enhance each event's experience.