当收到更改时，传感器值在TextView小部件的屏幕上显示。
When changes are received, the sensor values are displayed on the screen in TextView widgets.
第三个参数是一个系统提示，指出应用程序更新传感器值所需的速度。
The third parameter is a hint for the system to indicate how quickly the application requires updates to the sensor values.
方向和加速表传感器都提供三个数据值。
The orientation and accelerometer sensors each provide three data values.
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