android开发PathEffect问题处理

我要画出一块由不规则path组成的区域，并且这个path因为视觉效果需要设置圆角，我就通过paint.setpatheffect(new cornerpatheffect(300)); 给设置了圆角，但是在通过这个path组合成区域的时候因为这个圆角的设置整个区域都有圆角的效果了，这不是我想要的。

如图，黑色是我的path，红色是我设置了圆角的由path组成的区域。四个角落都有了圆角的效果，这不是我想要的。

而蓝色区域是未设置圆角的，此时path一侧的区域就不符合标准了。

以下是我的全部代码

public class patheffectview extends view {

  private path line;
  private paint linepaint;


  private path range;
  private paint rangepaint;
  private final paint paint3;

  public patheffectview(context context, @nullable attributeset attrs) {
    super(context, attrs);

    linepaint = new paint(paint.anti_alias_flag);

    linepaint.setstrokewidth(10);
    linepaint.setcolor(color.black);
    linepaint.setstyle(paint.style.stroke);
    linepaint.setpatheffect(new cornerpatheffect(300));

    rangepaint = new paint(linepaint);

    rangepaint.setcolor(color.blue);
    rangepaint.setstyle(paint.style.fill);


    paint3 = new paint(linepaint);
    paint3.setcolor(color.red);

  }

  @override
  protected void onsizechanged(int w, int h, int oldw, int oldh) {
    super.onsizechanged(w, h, oldw, oldh);

    line = new path();
    range = new path();

    line.moveto(0,1000);
    line.rlineto(200,-150);
    line.rlineto(200,300);
    line.rlineto(200,-350);
    line.rlineto(200,320);
    line.rlineto(200,-370);
    line.lineto(w,800);


    range.addpath(line);
    range.lineto(w,h);
    rangepaint.setpatheffect(null);
    range.lineto(0,h);
    range.close();
  }

  @override
  protected void ondraw(canvas canvas) {
    super.ondraw(canvas);
    canvas.save();
    canvas.translate(0,-20);
    canvas.drawpath(line, linepaint);
    canvas.restore();


    canvas.drawpath(range, rangepaint);
    canvas.drawpath(range,paint3);
  }
}