Lets Jenkins push build result notifications directly to your Android device, using Google's free Cloud Messaging service.
Check out buildwatch.org for more information, and download the Android app from Google Play.
If you have a Sony SmartWatch, build results can also be sent direct direct to your watch!
The plugin provides plenty of inline help, but you can also check out a setup guide and videos at buildwatch.org/setup.html.
https://wiki.jenkins-ci.org/display/JENKINS/GCM+Notification+Plugin