public class MyTagExpandableListAdapter extends BaseExpandableListAdapter {

	private static final int CHILD_TYPE_COUNT = 2;
    private Context _context;
    private List<String> _listDataHeader; // header titles
    // child data in format of header title, child title
    private HashMap<String, List<String>> _listDataChild;

    public MyTagExpandableListAdapter(Context context, List<String> listDataHeader,
            HashMap<String, List<String>> listChildData) {
        this._context = context;
        this._listDataHeader = listDataHeader;
        this._listDataChild = listChildData;
    }

    @Override
    public Object getChild(int groupPosition, int childPosititon) {
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .get(childPosititon);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    @Override
    public int getChildType(int groupPosition, int childPosition) {
        String s = (String)getChild(groupPosition, childPosition);
        if(s.isEmpty())
            return 0;
        else
            return 1;
    }

    @Override
    public int getChildTypeCount() {
        return CHILD_TYPE_COUNT;
    }

    @Override
    public View getChildView(int groupPosition, final int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {

        final String childText = (String) getChild(groupPosition, childPosition);

        EmptyViewHolder emptyViewHolder = null;
        PopulatedViewHolder populatedViewHolder = null;

        int type = getChildType(groupPosition, childPosition);

        if (convertView == null || (type == 0 && (convertView.getTag()) instanceof PopulatedViewHolder)
        						|| (type == 1 && (convertView.getTag()) instanceof EmptyViewHolder)) {

            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            switch(type){
	            case 0:
	                //type is empty
	                emptyViewHolder =  new EmptyViewHolder();
	                convertView = infalInflater.inflate(R.layout.empty_layout,
	                        parent, false);

	                TextView tv = (TextView) convertView.findViewById(R.id.empty);
                    emptyViewHolder.empty = tv;

	                //...initialize your viewcomponents of the populated layout here...

	                convertView.setTag(emptyViewHolder);
	                break;
	            case 1:
	            	populatedViewHolder = new PopulatedViewHolder();
	            	convertView = infalInflater.inflate(R.layout.list_item, null);

	            	TextView tv1 = (TextView) convertView.findViewById(R.id.lblListItem);
	            	populatedViewHolder.UserName = tv1;

	            	convertView.setTag(populatedViewHolder);
	        }
        }
        else {
            switch (type) {
                case 0:
                    emptyViewHolder = (EmptyViewHolder)convertView.getTag();
                    break;

                case 1:
                    populatedViewHolder = (PopulatedViewHolder)convertView.getTag();
                    break;
            }
        }

        switch(type){
        case 0:
            //empty
            //set the values of your empty view here
        	emptyViewHolder.empty.setText("test");

            break;
        case 1:
            //populated
            //set the values of your populated view here
        	populatedViewHolder.UserName.setText(childText);

            break;
     }


        return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
            return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                    .size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return this._listDataHeader.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        return this._listDataHeader.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        return groupPosition;
    }


    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        String headerTitle = (String) getGroup(groupPosition);
        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.list_group, null);
        }

        TextView lblListHeader = (TextView) convertView
                .findViewById(R.id.lblListHeader);
        lblListHeader.setTypeface(null, Typeface.BOLD);
        lblListHeader.setText(headerTitle);

        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }

    static class PopulatedViewHolder {
        //declare the elements of a populated view here
    	public TextView UserName;
    }

    static class EmptyViewHolder {
        //declare the elements of an empty view here
    	public TextView empty;
    }

}