if (mAspectRatio > 0) {
                    height = (int) (width * mAspectRatio);
                    heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
                } else if (mCameraPreview != null && mCameraPreview.getSurfaceSize().area() > 0) {
                    CameraSize previewSize = mCameraPreview.getSurfaceSize();