Android ViewPager setCurrentItem not loading the requested page -

i trying move specified page in viewpager.

my code -

    if(isfirstcall) {         mpageradapter = new screenslidepageradapter(getfragmentmanager(), pageid);         mpager.setadapter(mpageradapter);     }      new handler().post(new runnable() {         @override         public void run() {             mpager.setcurrentitem(currentpageposition);         }     });      mpager.addonpagechangelistener(new viewpager.simpleonpagechangelistener() {          private static final float thresholdoffset = 0.5f;          @override         public void onpagescrolled(int position, float positionoffset, int positionoffsetpixels) {              super.onpagescrolled(position, positionoffset, positionoffsetpixels);               if (checkdirection) {                  mpager.setpagingenabled(false);                  if (thresholdoffset > positionoffset) {                     checkdirection = false;                      // call service next page position                  } else {                     checkdirection = false;                      // call service prev page position                  }              }          }          @override         public void onpagescrollstatechanged(int state) {              super.onpagescrollstatechanged(state);              if ((scrollstarted == false) && (state == viewpager.scroll_state_dragging) ) {                 scrollstarted = true;                 checkdirection = true;             } else {                 scrollstarted = false;             }          }          @override         public void onpageselected(int position) {          }     }); 

when try update currentpageposition variable, viewpager hangs , not move specified page immediately. (it observed that, after approximately 10-15 mins specified page called.)

whereas, if don't modify value of currentpageposition variable, works fine (but moves different page wrong value).

i unable understand going wrong.

please help..

observation -

my observation - onpagescrollstatechanged method not called state = 1. resulting in failure of condition in onpagescrolled. next page not called. don't have idea why onpagescrollstatechanged not getting called state 'scroll_state_dragging'.

change

new handler().post(new runnable() {     @override     public void run() {         mpager.setcurrentitem(currentpageposition);     } }); 

into

mpager.setcurrentitem(currentpageposition); mpageradapter.notifydatasetchanged(); 

you should run ui change related code main ui thread.