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);
  }
}