android - Updating fragments/views in viewpager with fragmentStatePagerAdapter -

need problem of updating pages while using viewpager. using simple viewpager fragmentstatepageradapter. want access current fragment/view can update textviews in fragment/view. searched around in forum , came know few things - 1 of ways handle setting tag in instantiateitem() call of adapter , retreive view findviewbytag. not understand how implement , not sure if work fragmentstatepageradapter. - explored other options suggested in various forums, cannot make them work.

my code same in android http://developer.android.com/training/animation/screen-slide.html. basic components same (fragment activity xml display components including textview, viewpager xml view pager in it, fragment class , main fragmentactivity class). in fragmentactivity class have added pagechangelistener viewpager can textview changes during onpageselected().

any is appreciated.

adding code reference.

public class myactivity extends fragmentactivity   //variable declarations   protected void oncreate(bundle savedinstancestate) {   viewpager mpager = (viewpager) findviewbyid(r.id.pager);   mpageradapter = new screenslidepageradapter(getsupportfragmentmanager());   mpager.setadapter(mpageradapter);   view currview;    onpagechangelistener pagechangelistener = new onpagechangelistener() {     @override     public void onpageselected(int pageselected) {        dotextviewchnges();//access text view , update based on pageselected     ---this stuck in trying textview in current fragmwnt/view-------    }    mpager.setonpagechangelistener(pagechangelistener);  }   private class screenslidepageradapter extends fragmentstatepageradapter {      public screenslidepageradapter(android.support.v4.app.fragmentmanager  fm) {         super(fm);     }      @override     public android.support.v4.app.fragment getitem(int position) {          return screenslidepagefragment.create(position, <other parameters want pass>);     }      @override     public int getcount() {         return num_pages;     } } 

in onpagechangelistener:

      onpagechangelistener pagechangelistener = new onpagechangelistener() {             @override             public void onpageselected(int pageselected) {  screenslidepagefragment currentfragment = (screenslidepagefragment) mpageradapter.getitem(pageselected)                dotextviewchnges();//access text view , update based on pageselected             ---this stuck in trying textview in current fragmwnt/view-------            }