英文:
How to remove horizontal recyclerview(child) inside the recyclerview(parent) scroll to first position when notifyitemchange?
问题
我在RecyclerView中使用多种视图类型。其中一种视图类型是具有水平方向的线性LayoutManager的RecyclerView。我在父RecyclerView中加载了所有视图类型。当我更改位置为10的水平RecyclerView项中的某个项目并使用adapter?.notifyItemChanged(10)更新时，水平RecyclerView会跳到第一个位置0。这会导致糟糕的用户体验。
此外，我在父和子RecyclerView中使用了android:descendantFocusability="blocksDescendants"和setHasFixedSize(true)，但并没有起作用。有没有解决这个问题的方法？我还附上了参考图像 
英文:
I am using multiple view type inside the recyclerview. In which one of the view type is recyclerview of linear layoutmanager with horizontal orientation. I loaded all view type inside the parent recyclerview. When I change the some item in horizonatal recyclerview item of position 10 and update by adapter?.notifyItemChanged(10), the horizonatal recyclerview jump to first position 0. And it creates a bad user experience.
Also I used android:descendantFocusability="blocksDescendants" and setHasFixedSize(true) in parent and child Recyclerview not does not works. Is there is any way to solve my problem. And also attached image for reference
Here position 1 is horizonal recyclerview
答案1
得分: 1
你可以保存RecyclerView的布局实例，并在通知适配器后进行恢复，这将恢复布局管理器的属性，如滚动位置。
val savedInstance = recyclerView.layoutManager?.onSaveInstanceState()
adapter?.notifyItemChanged(10)
recyclerView.layoutManager?.onRestoreInstanceState(savedInstance)
英文:
You could save the RecyclerView's layout instance and restore post notifying adapter, this will restore layout manager properties like scroll position
val savedInstance = recyclerView.layoutManager?.onSaveInstanceState()
adapter?.notifyItemChanged(10)
recyclerView.layoutManager?.onRestoreInstanceState(savedInstance)
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