Android监听距离传感器

//在activity或service等创建时定义注册监听器
private SensorManager mSensorMgr;
private Sensor mGnPSensor;

//获取传感器管理类及距离传感器
mSensorMgr = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
mGnPSensor = mSensorMgr.getDefaultSensor(Sensor.TYPE_PROXIMITY);

//在传感器管理类中注册距离传感器的监听器
mSensorMgr.registerListener(mGnPSensorEventListener, mGnPSensor, 12000);

//定义监听器        
private final SensorEventListener mGnPSensorEventListener = new SensorEventListener() {
        @Override
        public void onSensorChanged(SensorEvent event) {
            if (event.sensor.getType() == Sensor.TYPE_PROXIMITY) {
                swithcGnPSensorTag(event);
            }
        }

        @Override
        public void onAccuracyChanged(Sensor sensor, int accuracy) {

        }

    };

private void swithcGnPSensorTag(SensorEvent event) {
           //event.values[0]为0，表示靠近，否则是远离
    if (event.values[0] != 0) {
        mGnPSensorTag = true;
    } else {
        mGnPSensorTag = false;
    }
}

//最后记得在activity或service等销毁时注销监听器
mSensorMgr.unregisterListener(mGnPSensorEventListener);