关闭所有组除了在扩展列表视图android的选定组 [英] Collapse all group except selected group in expandable listview android

问题描述

我正在开发使用可扩展列表视图android应用。其实我需要的是，我列出组，其中包含子。

I'm developing android application using expandable list view. Actually what I need is, I'm listing group, which contains child.

如果我选择unexpandable组，应该扩大后，我会在那个时候，第一组应折叠选择第二组。我做了谷歌，但我找不到我想要的。请帮我。

If I select an unexpandable group, it should expand, after I ll select second group at that time the first group should be collapsed. I did Google, but I couldn't find what I want. Please help me out.

推荐答案

有存储在一个变量的当前扩大集团的立场。在onGroupExpanded做到以下几点。

Have the current expanded group position stored in a variable. In onGroupExpanded do the following.

private int lastExpandedPosition = -1;
private ExpandableListView lv; //your expandable listview
...

lv.setOnGroupExpandListener(new OnGroupExpandListener() {

    @Override
    public void onGroupExpand(int groupPosition) {
            if (lastExpandedPosition != -1
                    && groupPosition != lastExpandedPosition) {
                lv.collapseGroup(lastExpandedPosition);
            }
            lastExpandedPosition = groupPosition;
    }
});

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