Rect rect = new Rect (0,0,400,400);//假设这个400的bitMap区域里面有之前画的path内容
Canvas canvas = new Canvas(bitMap);
canvas.save();
canvas.clipRect(rect);
canvas.drawColor(0xff95c345);
canvas.drawPath(path,paint);
canvas.retore();
这样操作后,path确实会用paint画出,但是之前rect区域里面的path内容没了,如何保存之前rect,然后恢复呢?
新建一个canvas进行绘制。