Android 如何将ListView中的目标项目显示在屏幕顶部

我正在编写一个android应用程序，其中包含一个列表视图和一些项目（通过数据库获取，可以是100+） 我希望滚动listview以显示特定项目（比如listview中的位置x） 我曾经

视图已滚动。但一旦项目出现，它就停止了。（该项目现在显示在屏幕底部） 我认为更好的设计是在屏幕顶部或至少在屏幕中间显示项目。 我该怎么做

我现在正在寻找一种方法，找到在屏幕上真正可见的listview索引。 我尝试过getFirstVisiblePosition（），但它似乎总是返回0。

您会发现它比

smoothScrollToPosition（）更好。如果在后台加载支持ListView的数据，则需要延迟发出
setSelection（）
，直到数据加载完毕

getFirstVisiblePosition（）
对我来说很好，但也只有在加载所有数据后才有用。下面是我用于显示从远程站点获取的数据的ListView的一些代码：

    // the list has been updated, fix the selection. loadFinished will be true if there are no phantom placeholders left.
protected void listLoaded(boolean loadFinished) {
    // if the user has scrolled or we previously completed resetting the position, do nothing
    if(wasScrolled)
        return;
            // if we were restored from saved data, reload that data now.
    if(listState != null) {
        postListView.onRestoreInstanceState(listState);
        listState = null;
    } else if(initialPos >= 0) // if we had a specific initial position, set it now
        setSelection(initialPos);
    else if(postId >= 0)  // or if there is a specific post ID we want displayed
        setSelection(postAdapter.getPostPosition(postId));
    else // otherwise scroll to the first unread post
        setSelection(postAdapter.getFirstUnread());
    if(loadFinished) // if all data has been loaded, set a flag to prevent this being repeated
        wasScrolled = true;
}

    // the list has been updated, fix the selection. loadFinished will be true if there are no phantom placeholders left.
protected void listLoaded(boolean loadFinished) {
    // if the user has scrolled or we previously completed resetting the position, do nothing
    if(wasScrolled)
        return;
            // if we were restored from saved data, reload that data now.
    if(listState != null) {
        postListView.onRestoreInstanceState(listState);
        listState = null;
    } else if(initialPos >= 0) // if we had a specific initial position, set it now
        setSelection(initialPos);
    else if(postId >= 0)  // or if there is a specific post ID we want displayed
        setSelection(postAdapter.getPostPosition(postId));
    else // otherwise scroll to the first unread post
        setSelection(postAdapter.getFirstUnread());
    if(loadFinished) // if all data has been loaded, set a flag to prevent this being repeated
        wasScrolled = true;
}