viewPager+fragment+xbanner有滑动冲突

[wangtonggen]

viewPager可以滑动 xbanner不能滑动

[wangtonggen]

外层viewPager使用的是viewPager2

[xiaohaibin]

这两个结合使用应该会造成冲突的

[jolly336]

same issue，我做了 viewpager2 hook 处理，把其内部的 recyclerView touchSlop 修改了，也算是一种方式吧。代码如下：Kotlin

• step1 define extension

  /**
  * Reduces drag sensitivity of [ViewPager2] widget
  * [ Support nested scrolling elements with the same scroll direction.](https://issuetracker.google.com/issues/123006042)
  */
  fun ViewPager2.reduceDragSensitivity() {
  try {
      val recyclerViewField = ViewPager2::class.java.getDeclaredField("mRecyclerView")
      recyclerViewField.isAccessible = true
      val recyclerView = recyclerViewField.get(this) as RecyclerView
  
      val touchSlopField = RecyclerView::class.java.getDeclaredField("mTouchSlop")
      touchSlopField.isAccessible = true
      val touchSlop = touchSlopField.get(recyclerView) as Int
      touchSlopField.set(recyclerView, touchSlop * 4)
  } catch (e: Exception) {
      // failed to change:(
  }
  }

• step2 use in page

viewpager2.reduceDragSensitivity()

[afangafang]

same issue ,这里我借助Google处理ViewPager2嵌套冲突的思路 对NestedScrollableHost.kt 进行了改造，并解决了这一问题，NestedScrollableHost的使用参考googles示例

源代码 private val child: View? get() = if (childCount > 0) getChildAt(0) else null

修改后 private val child: View? get() = when { childCount > 0 && getChildAt(0) is XBanner -> (getChildAt(0) as XBanner).viewPager childCount > 0 -> getChildAt(0) else -> null }