要在Android应用程序中计算设备的方向，可以使用SensorManager类。下面是代码示例，演示如何获取设备的朝向：

首先，在AndroidManifest.xml文件中添加以下权限：

然后，在你的Activity类中，添加以下代码：

public class MainActivity extends AppCompatActivity implements SensorEventListener {

private SensorManager sensorManager;
private Sensor accelerometerSensor;
private Sensor magnetometerSensor;

private float[] accelerometerData = new float[3];
private float[] magnetometerData = new float[3];

private float[] rotationMatrix = new float[9];
private float[] orientationAngles = new float[3];

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    assert sensorManager != null;
    accelerometerSensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    magnetometerSensor = sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
}

@Override
protected void onResume() {
    super.onResume();
    sensorManager.registerListener(this, accelerometerSensor, SensorManager.SENSOR_DELAY_UI);
    sensorManager.registerListener(this, magnetometerSensor, SensorManager.SENSOR_DELAY_UI);
}

@Override
protected void onPause() {
    super.onPause();
    sensorManager.unregisterListener(this);
}

@Override
public void onSensorChanged(SensorEvent event) {
    if (event.sensor == accelerometerSensor) {
        System.arraycopy(event.values, 0, accelerometerData, 0, event.values.length);
    } else if (event.sensor == magnetometerSensor) {
        System.arraycopy(event.values, 0, magnetometerData, 0, event.values.length);
    }

    boolean success = SensorManager.getRotationMatrix(rotationMatrix, null, accelerometerData, magnetometerData);
    if (success) {
        SensorManager.getOrientation(rotationMatrix, orientationAngles);
        float azimuth = (float) Math.toDegrees(orientationAngles[0]);
        float pitch = (float) Math.toDegrees(orientationAngles[1]);
        float roll = (float) Math.toDegrees(orientationAngles[2]);

        Log.d("