在列表视图和列表视图中设置可见性时出现问题基础适配器
我正在研究自动增长的列表视图。每次在我打电话之前，
mAdapter.notifyDataSetChanged();
我都会用进度圈切换列表中的最新项目。
/**
* displays a progress banner instead of the last item.
* @param reload boolean
*/
protected void showReloadView(boolean reload){
View item = mListView.getChildAt(onLastItem);
//View item = mListView.getAdapter().getView(onLastItem, null, null);
content = item.findViewById(id.itemContent);
loading = item.findViewById(id.itemLoading);
if(reload){
content.setVisibility(View.GONE);
loading.setVisibility(View.VISIBLE);
}else{
content.setVisibility(View.VISIBLE);
loading.setVisibility(View.GONE);
}
我的问题是，我正在回收 SDK 中提到的 EfficientAdapter 视图。 因此，我的 ListView 对象当前保存的项目不超过 8 个（因为不再可见）
第一次运行没问题，因为“onLastItem”为 7（可见项目 - 1），但第二次运行
ListView.getChildCount()
仅返回 6 个项目。那么为什么我的 ListView 越来越小呢？因为可见性。消失了？ 我做错了吗？
我也尝试过使用未注释的行。我的适配器知道列表的实际大小，我什至可以获得视图。但设置这些视图的可见性没有任何效果。
提前谢谢
i'am working on an autogrowing listview. Everytime before i call
mAdapter.notifyDataSetChanged();
i toggle the latest item on the list with a progress circle.
/**
* displays a progress banner instead of the last item.
* @param reload boolean
*/
protected void showReloadView(boolean reload){
View item = mListView.getChildAt(onLastItem);
//View item = mListView.getAdapter().getView(onLastItem, null, null);
content = item.findViewById(id.itemContent);
loading = item.findViewById(id.itemLoading);
if(reload){
content.setVisibility(View.GONE);
loading.setVisibility(View.VISIBLE);
}else{
content.setVisibility(View.VISIBLE);
loading.setVisibility(View.GONE);
}
My Problem here is that i'am recycling my views as mentioned in the SDK as EfficientAdapter.
Therefore my ListView object currently holds no more than 8 items (cause there are no more visible)
The first run is ok, because "onLastItem" is 7 (visible items - 1), but the second run
ListView.getChildCount()
returns just 6 items. So why is my ListView getting smaller? Because of Visibility.GONE?
Am i doing smth wrong?
I've tried to use the uncommented line as well. My Adapter knows the real size of the list and i can even get the view. But setting the visibility on these views has no effect.
Thx in advance
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这是我的猜测，但您必须查看
ListView的实现才能确定。FWIW，我用我的
EndlessAdapter采取了相反的方法 - 我保留ListView并使用装饰适配器来处理获取更多数据。That'd be my guess, but you'd have to look at the implementation of
ListViewto know for sure.FWIW, I took the reverse approach with my
EndlessAdapter-- I leave theListViewalone and use a decorating adapter that handles fetching more data.观看 google IO 09 视频后，我解决了该问题。
由于列表视图仅包含可见视图，我只是将代码更改为：
将视图保存到字段，更新数据集后我可以切换回布局。
测试了一下，效果很完美。
感谢您抽出时间。
After watching the google IO 09 video i resolved the problem.
Since the Listview contains no more than the visible views i just changed my code to:
Saving the views to a field and after update the dataset i can switch back the layouts.
Tested it and works perfect.
Thank you for your time.