Programmatically Collapse a Group in Expandablelistview

Programmatically collapse a group in ExpandableListView

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;
    }

Expand group row programmatically in expandable list

In adapter

private OnItemSelectedListener onItemSelectedCallback;

public interface OnItemsSelectedListener {
    public void onImageSelected(int groupPos);
}

public YourAdapter(Context context) {
    try {
        this.onItemSelectedCallback = (OnItemSelectedListener ) context;
    }
    catch (ClassCastException e) {
        throw new ClassCastException(context.toString() + " must implement OnItemSelectedListener ");
    }
}

Add this in getView()

ImageView imageView = new ImageView();
imageView.setTag(R.id.tagGroupPosition, groupPosition);
imageView.setOnClickListener(onClickListener);

Add this in OnClickListener

OnClickListener onClickListener = new OnClickListener() {
    @Override
    public void onClick(View v) {
        int groupPos = ((ImageView) v).getTagId(R.id.tagGroupPosition);
        onItemSelectedCallback.onImageSelected(groupPos);
    }
}

Then in activity you have to implements YourAdapter.OnItemsSelectedListener the Override onImageSelected

@Override
public void onImageSelected(int groupPos){
    if(expandableList.isGroupExpanded(groupPos)){
        expandableList.collapseGroup(groupPos);
    }else{
        expandableList.expandGroup(groupPos);
    }
}

Collapse all group except selected group in expandable listview android

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;
    }
});

Programmatically Expand/Collapse Group

I just recently went through this myself and finally got it all working properly on my end. I posted my original question here along with my final solution to get everything working properly. Not sure if that will help you out, but it sounds REAL close to the issue that I was having and using my solution, I was able to get it working properly.

Toggle groups in expandable listview

There's no such thing out-of-box, but you can build it yourself pretty easily. You need to add the listener to collapse the previously openned group:

expListView.setOnGroupExpandListener( new OnGroupExpandListener() {
  int previousGroup = -1;

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

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