//adds header, footer and data to the ExpandableListView
        private void InitializeExpandableListView()
        {
            dictGroup = new Dictionary <string, List <string> > ();
            FillDictGroup();

            View view = View.Inflate(this, Resource.Layout.ExpandHeadFoot, null);

            view.FindViewById <TextView> (Resource.Id.intro).Text = Resources.GetString(Resource.String.checklist_head);
            expand.AddHeaderView(view, null, false);
            view = View.Inflate(this, Resource.Layout.ExpandHeadFoot, null);
            view.FindViewById <TextView> (Resource.Id.intro).Text = Resources.GetString(Resource.String.checklist_foot);;
            expand.AddFooterView(view, null, false);

            expand.DividerHeight = 0;
        }