android - android方向传感器的替代品是什么？

Question

您好，我正在为 Android 开发一款 3D 游戏。

我目前正在尝试在我的游戏中添加一个传感器，以允许玩家倾斜 android 作为其控件。

理想情况下，我想使用 ORIENTATION 传感器，但我注意到它已被弃用。有谁知道如何在 android 中检测倾斜并且不使用这个传感器？

Answer 1

没有实际的“方向”传感器 - 这实际上是(曾经)一个复合传感器，由加速度计和磁强计组合生成。

来自 http://developer.android.com/reference/android/hardware/SensorEvent.html

“此传感器类型由于遗留原因而存在，请使用 getRotationMatrix() 和 remapCoordinateSystem() 和 getOrientation() 来计算这些值。”

public class OrientationTestActivity extends Activity implements SensorEventListener
{
    private SensorManager mSensorManager;
    private Sensor mAccelerometer;
    private Sensor mMagnetometer;

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

    private float[] mR = new float[9];
    private float[] mOrientation = new float[3];

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
        mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        mMagnetometer = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
    }

    protected void onResume() {
        super.onResume();
        mLastAccelerometerSet = false;
        mLastMagnetometerSet = false;
        mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
        mSensorManager.registerListener(this, mMagnetometer, SensorManager.SENSOR_DELAY_NORMAL);
    }

    protected void onPause() {
        super.onPause();
        mSensorManager.unregisterListener(this);
    }

    public void onAccuracyChanged(Sensor sensor, int accuracy) {
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        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) {
            SensorManager.getRotationMatrix(mR, null, mLastAccelerometer, mLastMagnetometer);
            SensorManager.getOrientation(mR, mOrientation);
            Log.i("OrientationTestActivity", String.format("Orientation: %f, %f, %f",
                                                           mOrientation[0], mOrientation[1], mOrientation[2]));
        }
    }
}