ShakeDroid
Android Shake Library. Detecting shake event. Source from http://teamtreehouse.com/library/android-development/build-an-android-crystal-ball-app/shaking-things-up/adding-a-shake-detector
Android Shake Library. Detecting shake event. Source from http://teamtreehouse.com/library/android-development/build-an-android-crystal-ball-app/shaking-things-up/adding-a-shake-detector