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更新时间：2022-02-04 04:34:55
我在尝试实现 OpenCV 时遇到了同样的问题.我能够通过对 deliveryAndDrawFrame 方法进行以下更改来修复它.
I had the same problem trying to implement OpenCV. I was able to fix it by making the following changes to the deliverAndDrawFrame method.
旋转画布对象
Rotate the canvas object
Canvas canvas = getHolder().lockCanvas();
// Rotate canvas to 90 degrees
canvas.rotate(90f, canvas.getWidth()/2, canvas.getHeight()/2);
在绘制之前调整位图的大小以适合整个画布大小
Resize the bitmap to fit entire size of canvas before drawing
// Resize
Bitmap bitmap = Bitmap.createScaledBitmap(mCacheBitmap, canvas.getHeight(), canvas.getWidth(), true);
// Use bitmap instead of mCacheBitmap
canvas.drawBitmap(bitmap, new Rect(0,0,bitmap.getWidth(), bitmap.getHeight()), new Rect(
(int)((canvas.getWidth() - mScale*bitmap.getWidth()) / 2),
(int)((canvas.getHeight() - mScale*bitmap.getHeight()) / 2),
(int)((canvas.getWidth() - mScale*bitmap.getWidth()) / 2 + mScale*bitmap.getWidth()),
(int）((canvas.getHeight() - mScale*bitmap.getHeight()) / 2 + mScale*bitmap.getHeight()
)), null);
// Unlock canvas
getHolder().unlockCanvasAndPost(canvas);