listview - Android Custom BaseAdapter -

i have baseadapter display listview section. each row have textview, want add textview each row. in item class , in getview() method, added new string text_id, when call adapter have error: item(string, string) in item cannot applied.

public class alphabetlistadapter extends baseadapter {  public static abstract class row {}  public static final class section extends row {     public final string text;     public section(string text) {         this.text = text;     } }  public static final class item extends row {     public final string text;     public final string text_id;     public item(string text, string text_id ) {         this.text = text;         this.text_id = text_id;     } } private list<row> rows;  public void setrows(list<row> rows) {     this.rows = rows; }  @override public int getcount() {     return rows.size(); }  @override public row getitem(int position) {     return rows.get(position); }  @override public long getitemid(int position) {     return position; }  @override public int getviewtypecount() {     return 2; }  @override public int getitemviewtype(int position) {     if (getitem(position) instanceof section) {         return 1;     } else {         return 0;     } }  @override public view getview(int position, view convertview, viewgroup parent) {     view view = convertview;      if (getitemviewtype(position) == 0) { // item         if (view == null) {             layoutinflater inflater = (layoutinflater) parent.getcontext().getsystemservice(context.layout_inflater_service);             view = (linearlayout) inflater.inflate(r.layout.row_item, parent, false);         }          item item = (item) getitem(position);          textview textview = (textview) view.findviewbyid(r.id.textview1);         textview textview_id = (textview) view.findviewbyid(r.id.id_cl);         textview.settext(item.text);         textview_id.settext(item.text_id);      } else { // section         if (view == null) {             layoutinflater inflater = (layoutinflater) parent.getcontext().getsystemservice(context.layout_inflater_service);             view = (linearlayout) inflater.inflate(r.layout.row_section, parent, false);         }          section section = (section) getitem(position);         textview textview = (textview) view.findviewbyid(r.id.textview1);         textview.settext(section.text);     }      return view; } } 

in oncreateview()

list<string> clienti = populateclienti();     collections.sort(clienti);      list<alphabetlistadapter.row> rows = new arraylist<alphabetlistadapter.row>();     int start = 0;     int end = 0;     string previousletter = null;     object[] tmpindexitem = null;       (string country : clienti) {         string firstletter = country.substring(0, 1);          // if we've changed new letter, add previous letter alphabet scroller         if (previousletter != null && !firstletter.equals(previousletter)) {             end = rows.size() - 1;             tmpindexitem = new object[3];             tmpindexitem[0] = previousletter.touppercase(locale.italian);             tmpindexitem[1] = start;             tmpindexitem[2] = end;             alphabet.add(tmpindexitem);              start = end + 1;         }          // check if need add header row         if (!firstletter.equals(previousletter)) {             rows.add(new alphabetlistadapter.section(firstletter));             sections.put(firstletter, start);         }          // add country list         rows.add(new alphabetlistadapter.item(country));         previousletter = firstletter;     }      if (previousletter != null) {         // save last letter         tmpindexitem = new object[3];         tmpindexitem[0] = previousletter.touppercase(locale.italy);         tmpindexitem[1] = start;         tmpindexitem[2] = rows.size() - 1;         alphabet.add(tmpindexitem);     }      adapter.setrows(rows);     lista.setadapter(adapter);     lista.setonitemclicklistener(new adapterview.onitemclicklistener() {         @override         public void onitemclick(adapterview<?> parent, view view, int position, long id) {             textview temp = (textview) view.findviewbyid(r.id.textview1);             string str = temp.gettext().tostring();             toast.maketext(getactivity(),str + " pressed " + position, toast.length_short).show();         }     });      updatelist();      return rootview;      } 

row_item.xml

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" android:padding="10dp" >  <textview     android:id="@+id/textview1"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="textview"     android:textcolor="#000000"     android:textsize="20sp" />  <textview     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:textappearance="?android:attr/textappearancesmall"     android:text="small text"     android:id="@+id/id_cl" /> 

the easy way accomplish add textview in xml layout file r.layout.row_section