How to collapse all the childviews above and below of a groupview in expandablelistview?

Question

I am trying to create a contactlist app..i took an expandable listview,with a layout as a childview for each group(contact). when i click on the contact(groupView),the child will expand(layout).now when i click on another contact, i want the previous expanded groups to be collapsed..can anyone help?

Answer 1

Have the current expanded group position stored in a variable. In onGroupExpanded do the following. lastExpandedPosition contains the recently expanded child

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;
    }
});