安卓指南针，使用了一个TextView控件显示角度的装置型。另外，还用一个指南针的图像指向南北方向。首先，该设备的传感器管理器需要被初始化时，应用程序被初始化。同时，需要注册设备的方位传感器当应用程序被激活和注销它当应用程序暂停，以节省电池。-Android compass, use a TextView control device type display angle. In addition, an image with a compass pointing north and south. First, the sensor Manager needs the device is initialized, the application is initialized. Meanwhile, the need to register the device orientation sensor when the application is activated and canceled it when the application is halted to conserve battery.