相機應用在沒有傳感器提供方向數據時，照片方向計算錯誤

public static int getJpegRotation(int cameraId, int orientation) {
        // See android.hardware.Camera.Parameters.setRotation for
        // documentation.
        int rotation = 0;
        if (orientation != OrientationEventListener.ORIENTATION_UNKNOWN) {
            CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId];
            if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
                rotation = (info.orientation - orientation + 360) % 360;
            } else {  // back-facing camera
                rotation = (info.orientation + orientation) % 360;
            }
        }//  +{
        else if(orientation == OrientationEventListener.ORIENTATION_UNKNOWN) {
            // If no orientation sensor exists, the jpg rotation needs to be modified
            Log.d(TAG, "getJpegRotation: no orientation sensor data received");
            int baseOrientation = SystemProperties.getInt("ro.cam.jpg.ori.base", 0);
            CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId];
            if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
                rotation = (info.orientation - baseOrientation + 360) % 360;
            } else {  // back-facing camera
                rotation = (info.orientation + baseOrientation) % 360;
            }
            Log.d(TAG, "getJpegRotation: new rotation = " + rotation);
        }
        // +}
        return rotation;
    }