当相机最大预览尺寸远小于屏幕尺寸时会报错Crop rectangle does not fit within image data.

[StaticCoder]

我的平板是1920x1200的分辨率，竖屏，摄像头为500w像素，通过Camera.Parameters.getSupportedPreviewSizes()获取支持的预览尺寸，发现最大为1280x768，远小于1920x1200，这样的话就会导致"Crop rectangle does not fit within image data."，查看库里的代码发现：

scanBoxAreaRect = mScanBoxView.getScanBoxAreaRect(height);

source = new PlanarYUVLuminanceSource(data, width, height, scanBoxAreaRect.left,

scanBoxAreaRect.top, scanBoxAreaRect.width(), scanBoxAreaRect.height(), false);

public Rect getScanBoxAreaRect(int previewHeight) {
if (mIsOnlyDecodeScanBoxArea && getVisibility() == View.VISIBLE) {
Rect rect = new Rect(mFramingRect);
float ratio = 1.0f * previewHeight / getMeasuredHeight();

        float centerX = rect.exactCenterX();
        float centerY = rect.exactCenterY();

        float halfWidth = rect.width() / 2f;
        float halfHeight = rect.height() / 2f;
        float newHalfWidth = halfWidth * ratio;
        float newHalfHeight = halfHeight * ratio;

        rect.left = (int) (centerX - newHalfWidth);
        rect.right = (int) (centerX + newHalfWidth);
        rect.top = (int) (centerY - newHalfHeight);
        rect.bottom = (int) (centerY + newHalfHeight);
        return rect;
    } else {
        return null;
    }
}

这样子会导致：

if (left + width > dataWidth || top + height > dataHeight) {
throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
}

虽然能通过app:qrcv_isOnlyDecodeScanBoxArea="false"来解决，但是这样就会导致功能缺失，希望能解决一下，谢谢。

[StaticCoder]

经研究将库里的几行代码改一下就行了：
rect.left = (int) (centerX - newHalfWidth);
rect.right = (int) (centerX + newHalfWidth);
rect.top = (int) (centerY - newHalfHeight);
rect.bottom = (int) (centerY + newHalfHeight);
改成
rect.left = (int)(centerX * ratio - newHalfWidth);
rect.right = (int)(centerX * ratio + newHalfWidth);
rect.top = (int)(centerY * ratio - newHalfHeight);
rect.bottom = (int)(centerY * ratio + newHalfHeight);