Collapse all group except selected group in expandable listview android

Question

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

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.

score 207 · Accepted Answer · answered Jul 11 '13 at 06:17

207

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;
    }
});

answered Jul 11 '13 at 06:17

user936414

7,574
3
30
29

hello user936414, i feel good that I give you 100th reputation point. Thanks for answer. – Gundu Bandgar Mar 19 '16 at 11:27
If the ExpandableListView has more than 2 groups, it will not close all groups – MD TAREQ HASSAN Apr 07 '17 at 07:40
1

@HassanTareq As `expandableListView` do not have its groups open by default, You would get the desired work by collapsing the previously opened group. – Inzimam Tariq IT Feb 01 '18 at 06:34
3

@user936414 This makes the expandablelstview to scroll to the end or middle of the expanded group. Any solution? – Sudheesh Mohan Apr 04 '18 at 08:06
Hi, how can i implement this above code on a custom made list view with a child group as a relative layout – Akshay May 11 '20 at 15:16

score 29 · Answer 2 · answered Jul 11 '13 at 06:11

29

Use this code this will work

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

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

answered Jul 11 '13 at 06:11

RajaReddy PolamReddy

22,428
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166

but in this case, it's lose the focus on current group..Please help me for that – Denny Sharma Apr 16 '14 at 12:21
1

This line `int previousItem = -1;` needs to be placed outside the method. Or `previousItem` will be reset each time (vanishing this later instruction: `previousItem = groupPosition;`) – Phantômaxx Jul 31 '14 at 10:32
2

This method has a flaw. It doesn't scroll to the top of the expanded group as it would do without the collapseGroup call. It is the case when the expanded group is BELOW the collapsed group. The view scrolls to the place where the expanded group would be if the old group hasn't be collapsed. Any idea how to fix it? – Dark.Rider Mar 08 '17 at 22:23
@Dark.Rider I am having the same issue. Did you manage to fix it? – Sudheesh Mohan Apr 04 '18 at 09:41

score 8 · Answer 3 · answered Jul 11 '13 at 06:16

8

@Override
    public void onGroupExpanded(int groupPosition){
        //collapse the old expanded group, if not the same
        //as new group to expand
        if(groupPosition != lastExpandedGroupPosition){
            listView.collapseGroup(lastExpandedGroupPosition);
        }

        super.onGroupExpanded(groupPosition);           
        lastExpandedGroupPosition = groupPosition;
    }

answered Jul 11 '13 at 06:16

KOTIOS

11,177
3
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66

Method name is misspelled, and there is no super AFAICT. – LarsH Oct 06 '18 at 18:36

score 5 · Answer 4 · answered Apr 07 '17 at 07:43

5

If the ExpandableListView has more than 2 groups:

expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
    @Override
    public void onGroupExpand(int groupPosition) {
        for (int g = 0; g < expandableListAdapter.getGroupCount(); g++) {
            if (g != groupPosition) {
                expandableListView.collapseGroup(g);
            }
        }
    }
});

It will collapse all groups except the clicked one.

answered Apr 07 '17 at 07:43

MD TAREQ HASSAN

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46

there is no method like getGroupCount() in expandable list view?? – Alp Altunel Nov 17 '17 at 13:48
1

If you really look close, you can see the method is on the adapter – Denny Aug 09 '18 at 16:33

score 3 · Answer 5 · edited Dec 30 '15 at 19:40

Get ExpendableListView and then override the following method - setOnGroupExpandListener

expandableListView = (ExpandableListView) findViewById(R.id.exp_listview);

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

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

score 1 · Answer 6 · edited Jul 31 '15 at 05:10

Try putting this in your ExpandableListAdapter, listView is a reference to the ExpandableListView itself. And lastExpandedGroupPosition is a integer member variable defined inside your ExpandableListAdapter.

 @Override
    public void onGroupExpanded(int groupPosition)

{

//collapse the old expanded group, if not the same

//as new group to expand

if(groupPosition != lastExpandedGroupPosition)

{

  listView.collapseGroup(lastExpandedGroupPosition);

  }

        super.onGroupExpanded(groupPosition);           
        lastExpandedGroupPosition = groupPosition;
    }

score 0 · Answer 7 · edited Apr 02 '15 at 14:58

   elstListView1.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
        @Override
        public void onGroupExpand(int groupPosition) {
            for(int i=0;i<listDataHeader.size();i++){
                if(i==groupPosition){
                    //do nothing}
                    else{
                        elstListView1.collapseGroup(i);
                    }
                }
            }
        });

score -5 · Answer 8 · edited Oct 07 '14 at 11:53

I also faced the same problem. But I could solved my problem by the following code:

As I had 4 Headers in my expandable list, based on that i wrote like this

expListView.setOnGroupExpandListener(new OnGroupExpandListener() {

            @Override
            public void onGroupExpand(int groupPos) {
                // TODO Auto-generated method stub
                expListView.collapseGroup(groupPos+1);
                expListView.collapseGroup(groupPos-1);
                expListView.collapseGroup(groupPos-2);
                expListView.collapseGroup(groupPos+2);
                expListView.collapseGroup(groupPos+3);
                expListView.collapseGroup(groupPos-3);
            }
        });`

Collapse all group except selected group in expandable listview android

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