android - android中的onSensorChanged在模拟器中不断被触发

Question

我正在使用 ACCELEROMETER 传感器并通过以下方式注册了一个监听器

mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    mAcceleratorSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    mSensorManager.registerListener(this, mAcceleratorSensor , SensorManager.SENSOR_DELAY_NORMAL);

这就是我的 onSensorChanged 的​​样子

@Override
public final void onSensorChanged(SensorEvent event) {
    int sensorType = event.sensor.getType();
    switch(sensorType){
        case Sensor.TYPE_ACCELEROMETER:
            float valueX = event.values[0];
            float valueY = event.values[1];
            float valueZ = event.values[2];
            Log.d(TAG, "Sensor Changed value:"+valueX+":"+valueY+":"+valueZ);
            break;

    }

然而这是我在日志中看到的

01-12 02:01:18.063 19691-19691/com.taxis.locationupdates2 D/LocationActivity: Sensor Changed value:2.0:2.0:2.0
01-12 02:01:18.129 19691-19691/com.taxis.locationupdates2 D/LocationActivity: Sensor Changed value:2.0:2.0:2.0

即使值没有变化，它也会无限循环地调用 onSensorChanged。我还没有用真实的设备测试过它。是否有任何设置来控制它。

Answer 1

该方法的命名很糟糕。

来自 the android docs对于 onSensorChanged:

Called when there is a new sensor event. Note that "on changed" is somewhat of a misnomer, as this will also be called if we have a new reading from a sensor with the exact same sensor values (but a newer timestamp).