我想通过多边形区域裁剪图像,但找不到任何库可以实现它。OpenCV对于这个小事情来说太大了。JJIL [进入链接描述] 只能裁剪矩形区域。也许你有任何想法,我该如何实现它?谢谢帮助!
对于Nidhi:尝试类似这样的方法,如果不起作用-为路径创建另一个画布,然后从中获取位图(用于蒙版),并将此蒙版位图应用于您的初始画布而不是绘制路径。
Bitmap obmp = BitmapFactory.decodeResource(getResources(), R.drawable.image1);
Bitmap resultImg = Bitmap.createBitmap(obmp.getWidth(), obmp.getHeight(), Bitmap.Config.ARGB_8888);
Bitmap maskImg = Bitmap.createBitmap(obmp.getWidth(), obmp.getHeight(), Bitmap.Config.ARGB_8888);
Canvas mCanvas = new Canvas(resultImg);
Canvas maskCanvas = new Canvas(maskImg);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.FILL);;
paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
Path path = new Path();
path.moveTo(view.mx,view.my);
path.lineTo(view.x1,view.y1);
path.lineTo(view.x2,view.y2 );
path.lineTo(view.x3,view.y3);
path.lineTo(view.x4,view.y4);
path.close();
maskCanvas.drawPath(path, paint);
mCanvas.drawBitmap(obmp, 0, 0, null);
mCanvas.drawBitmap(maskImg, 0, 0, paint);