android expandablelistview how to set space between groups items

Question

I have expandablelistview and I want to add padding (or margin) between the groups items, I used margin-botton on the group items, it works but now it is also a

Answer 1

I solved it by adding two views one to header and other to child item like shown below.

Header.xml

child.xml

Now add this code to your Adapter class. The idea is to show/hide the View when group is expanded/collapsed, show on child last item.

@Override
public View getGroupView(int listPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    String listTitle = (String) getGroup(listPosition);
    String listCount = "(" + getChildrenCount(listPosition) + ")";

    if (convertView == null) {
        LayoutInflater layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = layoutInflater.inflate(R.layout.expandable_header, null);
    }
    View view_hidden = convertView.findViewById(R.id.view_hidden);

    if (isExpanded) {
        view_hidden.setVisibility(View.GONE);
    } else {
        view_hidden.setVisibility(View.VISIBLE);
    }

    return convertView;
}

@Override
public View getChildView(int listPosition, final int expandedListPosition,
                         boolean isLastChild, View convertView, ViewGroup parent) {
    final Medication medication = (Medication) getChild(listPosition, expandedListPosition);
    if (convertView == null) {
        LayoutInflater layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = layoutInflater.inflate(R.layout.expandable_item, null);
    }

    View view_hidden = convertView.findViewById(R.id.view_hidden);
    if (isLastChild) {
        view_hidden.setVisibility(View.VISIBLE);
    } else {
        view_hidden.setVisibility(View.GONE);
    }

    return convertView;
}