Android Xoom 加速度计精度总是不可靠

Question

我正在为 Android 开发一个简单的指南针类型的应用程序，在 Xoom WiFi 上进行测试。加速度计读数的准确性始终为 SensorManager.SENSOR_STATUS_UNRELIABLE。磁场读数始终准确 SensorManager.SENSOR_STATUS_ACCURACY_HIGH。这可能是 Xoom 中的错误，还是我的代码有问题？

onCreate:
mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
accelGravitySensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
magSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);

onResume:
mSensorManager.registerListener(accelListener, accelGravitySensor, SensorManager.SENSOR_DELAY_NORMAL);
mSensorManager.registerListener(magListener, magSensor, SensorManager.SENSOR_DELAY_NORMAL);

private final SensorEventListener accelListener = new SensorEventListener() {
  public void onSensorChanged(SensorEvent event) {
    Log.d(TAG, "accel (" + event.values[0] + ", " + event.values[1] + ", " + event.values[2] + ") accuracy=" + accuracyTag(event.accuracy));
  }
  public void onAccuracyChanged(Sensor sensor, int accuracy) {}
};

Answer 1

这看起来像是 xoom 中的错误。检查这些帖子:

http://community.developer.motorola.com/t5/Android-App-Development-for/Xoom-magnetometer-Y-axis-always-reads-zero/td-p/14184

http://community.developer.motorola.com/t5/Android-App-Development-for/Q-Compass-Behavior-when-Xoom-is-held-in-different-orientations/td-p/14332