Android的ListView的项目添加到上面没有列表视图滚动

问题描述：

我有一个ListView，我想新的项目添加到列表视图的顶部，但我不想列表视图滚动的内容。我希望用户能够查看相同的项目，因为他是新的项目加入看着面前。

I have a listView and I want to add new items to the top of the list view but I dont want list view to scroll its content. I want user to look at the same item as he was looking before new items were added.

这是我如何增加新项目的ListView：

This is how I add new items to ListView:

this.commentsListViewAdapter.addRangeToTop(comments);
this.commentsListViewAdapter.notifyDataSetChanged();

和这是 addRangeToTop 方法：

public void addRangeToTop(ArrayList<Comment> comments)
{
    for (Comment comment : comments)
    {
        this.insert(comment, 0);        
    }
}

这是我的ListView：

this is my listView:

<ListView
    android:id="@+id/CommentsListView"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_above="@+id/AddCommentLayout" 
    android:stackFromBottom="true" >        
</ListView>

我想要做的是加载老的意见，当用户滚动到顶部。

What I want to do is to load old comments when user scrolls to the top.

感谢您的帮助。

答

我已经找到解决方案在这里Retaining在调用后，ListView控件位置notifyDataSetChanged

I have found solution here Retaining position in ListView after calling notifyDataSetChanged

抱歉重复的问题。最后code是这样的：

Sorry for duplicate question. The final code is this:

    int index = this.commentsListView.getFirstVisiblePosition() + comments.size();
    View v = this.commentsListView.getChildAt(commentsListView.getHeaderViewsCount());
    int top = (v == null) ? 0 : v.getTop();         

    this.commentsListViewAdapter.AddRangeToTop(comments);
    this.commentsListViewAdapter.notifyDataSetChanged();    

    this.commentsListView.setSelectionFromTop(index, top);

Android的ListView的项目添加到上面没有列表视图滚动

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