要获得方位角，可以使用加速度计和磁场传感器。您可以使用以下代码来记录方位角值。

public class MainActivity extends AppCompatActivity {
    private int mAzimuth = 0; // degree
    private SensorManager mSensorManager = null;
    private Sensor mAccelerometer;
    private Sensor mMagnetometer;
    boolean haveAccelerometer = false;
    boolean haveMagnetometer = false;
    @Override
    protected void onCreate( Bundle savedInstanceState ) {
        super.onCreate(savedInstanceState);
        mSensorManager = (SensorManager) getSystemService(Service.SENSOR_SERVICE);
        this.mAccelerometer = this.mSensorManager.getDefaultSensor( Sensor.TYPE_ACCELEROMETER );
        this.haveAccelerometer = this.mSensorManager.registerListener( mSensorEventListener, this.mAccelerometer, SensorManager.SENSOR_DELAY_GAME );
        this.mMagnetometer = this.mSensorManager.getDefaultSensor( Sensor.TYPE_MAGNETIC_FIELD );
        this.haveMagnetometer = this.mSensorManager.registerListener( mSensorEventListener, this.mMagnetometer, SensorManager.SENSOR_DELAY_GAME );
        if ( haveAccelerometer && haveMagnetometer ) {
            // ready to go
        } else {
            // unregister and stop
        }
    }
    private SensorEventListener mSensorEventListener = new SensorEventListener() {
        float[] gData = new float[3]; // accelerometer
        float[] mData = new float[3]; // magnetometer
        float[] rMat = new float[9];
        float[] iMat = new float[9];
        float[] orientation = new float[3];
        public void onAccuracyChanged(Sensor sensor, int accuracy ) {}
        @Override
        public void onSensorChanged( SensorEvent event ) {
            float[] data;
            switch ( event.sensor.getType() ) {
                case Sensor.TYPE_ACCELEROMETER:
                    gData = event.values.clone();
                    break;
                case Sensor.TYPE_MAGNETIC_FIELD:
                    mData = event.values.clone();
                    break;
                default: return;
            }
            if ( SensorManager.getRotationMatrix( rMat, iMat, gData, mData ) ) {
                mAzimuth= (int) ( Math.toDegrees( SensorManager.getOrientation( rMat, orientation )[0] ) + 360 ) % 360;
                Log.d("AzimuthTag", "Azimuth:"+mAzimuth);
            }
        }
    };
}

来源