HorizontalScrollView嵌套viewpage冲突

Question

我自己定义的viewpager，重写了ontouch还是没能解决，我想viewpager可以自由滑动，当在最左边的时候，继续滑动，出现侧滑菜单

public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
xDown = event.getX();
System.out.println(xDown);
return true;
case MotionEvent.ACTION_UP:
xUp = event.getX();
System.out.println(xUp);
break;
}
if(getCurrentItem()==0&&xUp-xDown>0){
getParent().requestDisallowInterceptTouchEvent(true);
}else{
getParent().requestDisallowInterceptTouchEvent(false);
}
return super.onTouchEvent(event);