android - How to get a column value of item in ListView when I use CHOICE_MODE_MULTIPLE mode and ArrayAdapter<String>? -

i hope use string aa=c.getstring(c.getcolumnindex("address")) column value of item in function private void setselectedandtotal.
app crash, how can do? thanks!

private listview lv;  private textview selectedandtotal;  private void initlistview() {     list<string> msglist = getsms();     arrayadapter<string> adapter2 = new arrayadapter<string>(this,             android.r.layout.simple_list_item_multiple_choice, msglist);     lv.setadapter(adapter2);     lv.setchoicemode(listview.choice_mode_multiple);     lv.setonitemclicklistener(new onitemclicklistener() {         @override         public void onitemclick(adapterview<?> arg0, view arg1, int arg2,                 long arg3) {             setselectedandtotal(arg2);         }     }); }  private void setselectedandtotal(int arg2){          cursor c = (cursor) lv.getitematposition(arg2);     string aa=c.getstring(c.getcolumnindex("address"));     selectedandtotal.settext(aa);        }   public list<string> getsms() {     list<string> sms = new arraylist<string>();     uri urismsuri = uri.parse("content://sms/inbox");     cursor cur = getcontentresolver().query(urismsuri, null, null, null,             null);      while (cur.movetonext()) {         string address = cur.getstring(cur.getcolumnindex("address"));         string body = cur.getstring(cur.getcolumnindexorthrow("body"));         sms.add("number: " + address + " .message: " + body);      }     return sms; } 

string aa=c.getstring(c.getcolumnindex("address")); selectedandtotal.settext(aa);  

if no such column exists, returns -1. probably, happens , passing integer argument considered resource id.

also, make sure initialized textview before settext().