Collapsing previously expanded Group, when new Group has been expanded in ExpandableListView

I'm using ExpandableListView. i have a around 100 groups in the list, and 10-15 childrens for each group.

now my problem is, whenever i expand a new Group , i want the previously expanded group to be closed. is there a way to do this. Please anyone tell me whether it is possible to do thi开发者_C百科s..

Thank u

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You can use the ExpandableListView.OnGroupExpandListener. Maintain the previously expanded groupPosition and use collapseGroup(groupPosition) to close the group.

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Very well, we have to maintain previous group integer by final or static variable

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expandableList.setOnGroupExpandListener(new OnGroupExpandListener() {
    int previousItem = -1;

    @Override
    public void onGroupExpand(int groupPosition) {
        if(groupPosition != previousItem ) {
            expandableList.collapseGroup(previousItem );
        }
        previousItem = groupPosition;
    }
});