Invalid Region.Op - only INTERSECT and DIFFERENCE are allowed

java.lang.IllegalArgumentException: Invalid Region.Op - only INTERSECT and DIFFERENCE are allowed
        at android.graphics.Canvas.checkValidClipOp(Canvas.java:779)
        at android.graphics.Canvas.clipPath(Canvas.java:1007)
        at com.kiminonawa.mydiary.entries.calendar.PageEffectView.drawCurrentPageArea(PageEffectView.java:340)
        at com.kiminonawa.mydiary.entries.calendar.PageEffectView.onDraw(PageEffectView.java:383)
        at android.view.View.draw(View.java:20234)
        at android.view.View.updateDisplayListIfDirty(View.java:19109)

Android9.0兼容性问题

   if(Build.VERSION.SDK_INT >= 28){
            canvas.clipPath(mPath0);
        }else {
            canvas.clipPath(mPath0, Region.Op.XOR);
        }