处理 WebView 与 ViewPager 滑动冲突

override fun onTouchEvent(event: MotionEvent): Boolean {
   if (event.action == MotionEvent.ACTION_DOWN) {
       val viewParent = findViewParentIfNeeds(this)
       viewParent?.requestDisallowInterceptTouchEvent(true)
   }
   return super.onTouchEvent(event)
}

override fun onOverScrolled(scrollX: Int, scrollY: Int, clampedX: Boolean, clampedY: Boolean) {
   dumpMessage("onOverScrolled scrollX=" + scrollX + ";scrollY=" + scrollY
           + ";clampedX=" + clampedX + ";clampedY=" + clampedY)
   if (clampedX) {
       val viewParent = findViewParentIfNeeds(this)
       viewParent?.requestDisallowInterceptTouchEvent(false)
   }
   super.onOverScrolled(scrollX, scrollY, clampedX, clampedY)
}

private fun findViewParentIfNeeds(tag: View): ViewParent? {
   val parent = tag.parent
   if (parent == null) {
       return parent
   }
   return if (parent is ViewPager ||
           parent is AbsListView ||
           parent is ScrollView ||
           parent is HorizontalScrollView ||
           parent is GridView) {
       parent
   } else {
       if (parent is View) {
           findViewParentIfNeeds(parent as View)
       } else {
           parent
       }
   }
}