How do I change the contents when I click the list in Custom ListView?

        _Set_Data_List = new List<string>()
        { { _HL_List[_HL_Default], _Ring_List[_Ring_Default], _VectTime_List[_VectTime_Default], _VectMode_List[_VectMode_Default], _WPT_List[_WPT_Default], _OS_List[_OS_Default],
        "TARGET ALARM", "GUARD ZONE", "FUNC BARGE", "TX STBY", "", "◁"};


        _DrawerAdapter = new ArrayAdapter<string>(_Context, Resource.Layout.Custom_DrawerList, Resource.Id._Custom_DrawerList_Text, _Set_Data_List);
        _IA_List.Adapter = _DrawerAdapter;


    private static void _IA_List_ItemClick(object sender, AdapterView.ItemClickEventArgs e)
    {
        //switch (e.Position)
        //{
        //    //    case 0:
        //        //        if (_HL_Default < 4)
        //        {
        //            //            _HL_Default++;
        //        }
        //        //        else if (_HL_Default == 4)
        //        {
        //            //            _HL_Default = 0;
        //        }


        //        //        //_DrawerAdapter.Remove(_Set_Data_List[0]);
        //        //        //_Set_Data_List[0] = _HL_List[_HL_Default];
        //        //        //_DrawerAdapter.Insert(_Set_Data_List[0], 0);

        //        //        break;
}

    static int _HL_Default = 0;
    static string[] _HL_Small_List = { "OFF", "1", "2", "3", "4" };
    static int _Big_Data = 0;
    static string[] _Big_List = { "HL", "RING", "VECT TIME", "VECT MODE", "WPT MARK", "OS", "◁" };

        DrawerListAdapter _Adatper = new DrawerListAdapter(mContext);
        DrawerListItem _Item;

        for (int i = 0; i < 10; i++)
        {
            _Item = new DrawerListItem();
            _Item.GetSmall = _Big_List[_Big_Data];

            switch(_Big_Data)
            {
                case 0:
                    _Item.GetBig = _HL_Small_List[_HL_Default];
                    break;
                case 1:
                    _Item.GetBig = _Ring_Small_List[_Ring_Default];
                    break;
                case 2:
                    _Item.GetBig = _VectTime_Small_List[_VectTime_Default];
                    break;
                case 3:
                    _Item.GetBig = _VectMode_Small_List[_VectMode_Default];
                    break;
                case 4:
                    _Item.GetBig = _WPT_Small_List[_WPT_Default];
                    break;
                case 5:
                    _Item.GetBig = _OS_Small_List[_OS_Default];
                    break;
                case 6:
                    break;
                case 7:
                    break;
                case 8:
                    break;
                case 9:
                    break;
            }

            _Adatper.AddItem(_Item);
            _Big_Data++;
        }

        _IA_List.Adapter = _Adatper;