java - Android : Acess pagerAdapter layout listview with ViewPager and AsyncTask -

i have pageradapter :

public class apppageradapter extends pageradapter {     context context;     public apppageradapter(context appcon)     {         this.context = context;     }     @override     public int getcount() {         return 10;     }     @override     public object instantiateitem(viewgroup container, int position) {         view viewitem = inflater.inflate(r.layout.pager_layout, container, false);         listview listview = (listview) viewitem.findviewbyid(r.id.list);     } } 

and in xml : "pager_layout.xml"

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" xmlns:wheel="http://schemas.android.com/apk/res-auto" android:layout_height="match_parent">   <listview      android:layout_width="wrap_content"      android:id="@+id/list"      android:divider="@color/activity_background"      android:layout_height="match_parent">      </listview> 

and, main fragment page :

public class apps extends fragment {     public apps() {}      @nullable     @override     public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {          mroot = inflater.inflate(r.layout.app_activity, container, false);         viewpager pager = (viewpager)mroot.findviewbyid(r.id.view_pager);         apppageradapter appadapter = new apppageradapter(getactivity());         pager.setadapter(appadapter);         pager.setonpagechangelistener(new viewpager.onpagechangelistener() {             @override             public void onpagescrolled(int position, float positionoffset, int positionoffsetpixels) { }              @override             public void onpageselected(int position) {                 //access position list view add adapter                 new loading().execute; //async task data , add list view pager             }              @override             public void onpagescrollstatechanged(int state) {}         });     } } 

now, how can access view on screen page adding data page?
want add data listview of page selected.
please me .

if viewpager have 4 fragments: a,b,c,d. , open fragment a. fragment b , d create automatically viewpager.

and if want add data listview. let see method:

@override   public object instantiateitem(viewgroup container, int position) {        view viewitem = inflater.inflate(r.layout.pager_layout, container, false);        listview listview = (listview) viewitem.findviewbyid(r.id.list);  } 

what

int position?

it page selected - openning. above code create 10 page in viewpager, each page have listview. if want add data this, write more code in method

instantiateitem()