Question

我使用以下（假设是非常标准的）代码来检索平板电脑设备的方向以实现增强现实（因此后置摄像头应指向有效的方向）。

private Sensor mAccelerometer;
private Sensor mMagnetometer;
private float[] mLastAccelerometer = new float[3];
private boolean mLastAccelerometerSet = false;
private float[] mLastMagnetometer = new float[3];
private boolean mLastMagnetometerSet = false;

private Sensor mAccelerometer;
private Sensor mMagnetometer;
private float[] mLastAccelerometer = new float[3];
private boolean mLastAccelerometerSet = false;
private float[] mLastMagnetometer = new float[3];
private boolean mLastMagnetometerSet = false;
private float[] inR = new float[9]; 
private float[] mR = new float[9];
private float[] mOrientation = new float[3];
...
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
...     
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mMagnetometer = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
...
mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_FASTEST);
mSensorManager.registerListener(this, mMagnetometer, SensorManager.SENSOR_DELAY_FASTEST);
...
public void onSensorChanged(SensorEvent event) {
    synchronized (this) {
       if (event.sensor == mAccelerometer) {
            System.arraycopy(event.values, 0, mLastAccelerometer, 0, event.values.length);

            mLastAccelerometerSet = true;

        } else if (event.sensor == mMagnetometer) {
            System.arraycopy(event.values, 0, mLastMagnetometer, 0, event.values.length);

            mLastMagnetometerSet = true;
        }

        if (mLastAccelerometerSet && mLastMagnetometerSet && scene.camera() != null && mPlane1 != null) {
            SensorManager.getRotationMatrix(inR, null, mLastAccelerometer, mLastMagnetometer);
            SensorManager.remapCoordinateSystem(inR, SensorManager.AXIS_X, SensorManager.AXIS_Z, mR);
            SensorManager.getOrientation(mR, mOrientation);

            /* my code that handles mOrientation */
        }
    }
}

问题是此代码在三星Galaxy Tab 10.1 （P7500，第一版）上完美运行。使用相同的代码在华硕Transformer Pad Infinity（TF700）上运行时，第一个值mOrientation [0]仅在我自己旋转平板电脑时在+2.0和+3.0之间变化（我希望它会介于0和3.14之间。

设备有问题或是否有其他我忽略的变量？

Answer 1

华硕TF700的硬件肯定存在一些错误。它可以是我们拥有的特定版本，也可以是设备的设计版本。使用其他Android设备，应用程序按预期工作。

使用增强现实时传感器的x值错误

1 个答案: