重力加速度传感器STK8312，android驱动，替代MMA7660-Gravity sensor STK8312, android-driven, alternative MMA7660

STK8312重力IC, 驱动程序代码,读取重力感应的方向值，还有点击，敲打，自由落体等标志。(STK8312 sensor IC, driver code, read the direction value of gravity induction, and click, knock, free falling and other signs.)