android - Single Choice Lists and onClick events -

i have choice_mode_single list 3 rows. how place onclick event changes value of arbitrary variable, if row 1 clicked, say, value of x = 1, , when row 2 clicked, value of x = 2, etc.?

    public class list extends listactivity {    @override         public void oncreate(bundle savedinstancestate) {                 super.oncreate(savedinstancestate);                 setlistadapter(new arrayadapter<string>(this, android.r.layout.simple_list_item_single_choice, genres));                 final listview listview = getlistview();                 listview.setitemscanfocus(false);                 listview.setchoicemode(listview.choice_mode_single);         }      private static final string[] genres = new string[] {"barre", "buffumville","hodges"}; } 

its quite simple..rather extending listactivity extend activity , declare listview in xml file below:

<listview          android:id="@+id/list"         android:layout_width="fill_parent"         android:layout_height="wrap_content"/> 

initialize listview in activity:

listview listview=(listview) findviewbyid(r.id.list); 

and after setting adapter did,set item click listener of listview below in code:

listview.setonitemclicklistener(new onitemclicklistener() {              public void onitemclick(adapterview<?> parent, view v, int position,                     long id) {                 toast.maketext(getbasecontext(), genres[position], toast.length_short).show();             }         }); 

by doing desired value of position of listview. surely result want.