由于clipRegion的一些问题，导致他被废弃了，但又有时候会用到，所以写了一个工具类来替代它
代码如下

package com.example;import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Region;
import android.graphics.RegionIterator;public class Util {public static void clipRegion(Region region, Canvas canvas){Region combinedRegion = new Region();Path compa=new Path();RegionIterator regionIterator=new RegionIterator(region);Rect sum=new Rect();Rect rect=new Rect();while(regionIterator.next(rect)){
//            combinedRegion.op(rect, Region.Op.UNION);compa.addRect(rect.left,rect.top,rect.right,rect.bottom, Path.Direction.CCW);
//            canvas.clipRect(rect);}canvas.clipPath(compa);}public static void drawRegion(Region region, Canvas canvas){Paint paint=new Paint();paint.setStyle(Paint.Style.STROKE);RegionIterator regionIterator=new RegionIterator(region);Rect rect=new Rect();while(regionIterator.next(rect)){canvas.drawRect(rect,paint);}}
}

代码解释：其实就是通过把region转化为path然后调用clippath来完成的。
代码有两个函数clipRegion和drawRegion就和名字一样一个是切割，一个是绘画，把相应的参数传入进去就可以了