将下图文件中的 deliverAndDrawFrame 方法
修改为
protected void deliverAndDrawFrame(CvCameraViewFrame frame){
Mat modified;
if (mListener != null) {
modified = mListener.onCameraFrame(frame);
} else {
modified = frame.rgba();
}
boolean bmpValid = true;
if (modified!= null) {
try {
Utils.matToBitmap(modified,mCacheBitmap);
} catch(Exceptione) {
Log.e(TAG, "Mattype: " + modified);
Log.e(TAG, "Bitmaptype: " + mCacheBitmap.getWidth() + "*" + mCacheBitmap.getHeight());
Log.e(TAG, "Utils.matToBitmap()throws an exception: " +e.getMessage());
bmpValid = false;
}
}
if (bmpValid&& mCacheBitmap != null) {
Canvas canvas =getHolder().lockCanvas();
if (canvas!= null) {
canvas.drawColor(0,android.graphics.PorterDuff.Mode.CLEAR);
/*if (BuildConfig.DEBUG)
Log.d(TAG, "mStretchvalue: " + mScale);
if (mScale != 0) {
canvas.drawBitmap(mCacheBitmap, new Rect(0,0,mCacheBitmap.getWidth(),mCacheBitmap.getHeight()),
newRect((int)((canvas.getWidth() - mScale*mCacheBitmap.getWidth()) / 2),
(int)((canvas.getHeight() - mScale*mCacheBitmap.getHeight()) / 2),
(int)((canvas.getWidth() -mScale*mCacheBitmap.getWidth()) / 2 + mScale*mCacheBitmap.getWidth()),
(int)((canvas.getHeight() - mScale*mCacheBitmap.getHeight()) / 2 +mScale*mCacheBitmap.getHeight())), null);
} else {
canvas.drawBitmap(mCacheBitmap, new Rect(0,0,mCacheBitmap.getWidth(),mCacheBitmap.getHeight()),
newRect((canvas.getWidth() - mCacheBitmap.getWidth()) / 2,
(canvas.getHeight()- mCacheBitmap.getHeight()) / 2,
(canvas.getWidth() -mCacheBitmap.getWidth()) / 2 + mCacheBitmap.getWidth(),
(canvas.getHeight()- mCacheBitmap.getHeight()) / 2 + mCacheBitmap.getHeight()), null);
}*/
/*----------------------------修改预览旋转90度问题--------------------------------*/
canvas.rotate(90,0,0);
float scale= canvas.getWidth() / (float)mCacheBitmap.getHeight();
float scale2= canvas.getHeight() / (float)mCacheBitmap.getWidth();
if(scale2> scale){
scale = scale2;
}
if (scale!= 0) {
canvas.scale(scale,scale,0,0);
}
canvas.drawBitmap(mCacheBitmap, 0, -mCacheBitmap.getHeight(), null);
/*----------------------------修改预览旋转90度问题--------------------------------*/
if (mFpsMeter != null) {
mFpsMeter.measure();
mFpsMeter.draw(canvas, 20, 30);
}
getHolder().unlockCanvasAndPost(canvas);
}
}
}