在调用后保留在ListView的位置notifyDataSetChanged [英] Retaining position in ListView after calling notifyDataSetChanged

问题描述

我使用OnScrollListener动态地添加项目到ListView当用户滚动至底部。后我将数据添加到适配器和呼叫notifyDataSetChanged虽然，在ListView追溯到到顶部。理想情况下，我想保留在ListView的位置。如何，我应该去这样做？

I'm using an OnScrollListener to dynamically add items to a ListView when the user scrolls to the bottom. After I add the data to the adapter and call notifyDataSetChanged though, the ListView goes back up to the top. Ideally, I would like to retain the position in the ListView. Any thoughts on how I should go about doing this?

推荐答案

难道这是你想要的吗？

// save index and top position
int index = mList.getFirstVisiblePosition();
View v = mList.getChildAt(0);
int top = (v == null) ? 0 : v.getTop();

// notify dataset changed or re-assign adapter here

// restore the position of listview
mList.setSelectionFromTop(index, top);

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