Reading sensor data - using the Android Sensor Framework in the previous chapter for details on reading sensor data Refer to the getRotationMatrix() Developer Document at http://developer.android.com/reference/android/hardware/SensorManager.html#getRotationMatrix(float[], float[], float[], float[]) Refer to the getOrientation() Developer Document at http://developer.android.com/reference/android/hardware/SensorManager.html#getOrientation(float[], float[]) Refer to the RotateAnimation Developer Document at http://developer.android.com/reference/android/view/animation/RotateAnimation.html