用ANDROID手机模拟方向盘操纵杆，键盘模式将重力感应器信号提取并翻译成键盘控制信号，方向盘模式将重力感应器信号翻译成方向盘扭动角度-Steering wheel with analog joystick ANDROID phone, keyboard mode signal extraction gravity sensor and translated into the keyboard control signal, the s