ExpandableListView 保持只有一个展开

注意，要放在刷新adapter后面

helpList.setOnGroupExpandListener(new OnGroupExpandListener()

{

@Override
public void onGroupExpand(int groupPosition)
{
for (int i = 0; i < adapter.getGroupCount(); i++)
{
if (groupPosition != i && helpList.isGroupExpanded(groupPosition))
{
helpList.collapseGroup(i);
}
}
}
});