ExpandableListView-空组消息 [英] ExpandableListView - empty group message

问题描述

我正在开发一个具有ExpandableListActivity的应用程序.当一个小组没有孩子时，我希望它显示一条消息，就好像它是一个孩子一样，通知该列表为空，如图所示:

I am developing an app which has an ExpandableListActivity. When a group has no children, I would like it to show a message, as if it was a child, informing that the list is empty, as shown in the picture:

是否有任何(合理简单)的方法或类似的方法?

Is there any (reasonably simple) way to do this, or something similar?

很抱歉，是否曾经有人问过我-我以为一定是这样，但是我什么也没找到.谢谢！

I am sorry if this has been asked before - I kind of assume it must have been, but I haven't been able to find anything. Thank you!

为澄清起见，我要寻找的不是完整ExpandableListView(可以通过setEmptyView设置)的空视图，而是没有孩子的父组.

To clarify, what I'm looking for is not an empty view for the complete ExpandableListView (which can be set with setEmptyView), but for parent groups with no children.

推荐答案

我对这个特定类的经验不是很好，但是我建议尝试覆盖Adapter的getChildrenCount方法以在没有该类的情况下返回1任何子记录.

My experience with this particular class isn't that great, but I would suggest trying to override the Adapter's getChildrenCount method to return 1 when there aren't any child records.

然后，在适配器的getChildView方法中，如果找不到指定的父级的任何子级，则返回包含消息的自定义视图.

Then, in the Adapter's getChildView method, if you cannot find any child for the specified parent, return a custom view containing your message.

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