java - Countdown timer in RecyclerView showing incorrect values -


i have developed app in want fetch target time values firebase , use these values in recycler adapter start countdown timer each row in recyclerview. earlier whenever values in row changed in realtime firebase time values started flickering , whenever scrolled recycler view countdown timer got messed , started showing erroneous values. found answer in stackoverflow, suggested start countdown timer in oncreateviewholder method instead of onbindview holder , helped in removing erroneous values , scrolling problem.

problem

but after new problem arised. values first 7 positions(0 6th position) shown correctly after 0th , 1st position values shown @ 7th , 8th positions , @ 9th position actual value should have been @ position 7 shown. don't know why happening. recycler view contain native ads starting @ position 2 , after every 3 items. oncreateviewholder , onbindviewholder code

public mainactivityadapter(context context, list<object> recyclerviewitems) {         mcontext = context;         mrecyclerviewitems = recyclerviewitems;          positionforcounter = 0;      }      /**      * creates new view menu item view or native express ad view      * based on viewtype. method invoked layout manager.      */     @override     public recyclerview.viewholder oncreateviewholder(viewgroup viewgroup, int viewtype) {         switch (viewtype) {              case native_express_ad_view_type :             view nativeexpresslayoutview = layoutinflater.from(                     viewgroup.getcontext()).inflate(r.layout.native_express_ad_container,                     viewgroup, false);                  log.d("counterads",string.valueof(positionforcounter));                 positionforcounter++;              return new nativeexpressadviewholder(nativeexpresslayoutview);             case match_item_view_type :                 // fall through             default:view matchitemlayoutview = layoutinflater.from(viewgroup.getcontext()).inflate(                     r.layout.match_item_container, viewgroup, false);                    //experimenting countdown timer                 matcheslist matchtimer = (matcheslist) mrecyclerviewitems.get(positionforcounter);                 string targettime = matchtimer.gettime();                 log.d("counterpositions",string.valueof(positionforcounter));                 log.d("counter", targettime);                 long milliseconds = 0;                 long diff;                 simpledateformat formatter = new simpledateformat("dd mmm yy hh:mm aa");                 formatter.setlenient(false);                 date enddate;                 try {                     enddate = formatter.parse(targettime);                     milliseconds = enddate.gettime();                 } catch (parseexception e) {                     e.printstacktrace();                 }                 diff = milliseconds - system.currenttimemillis();                 final matchitemviewholder matchitemholder = new matchitemviewholder(matchitemlayoutview);                  matchcounter =new countdowntimer(diff, 1000) {                     @override                     public void ontick(long millisuntilfinished) {                          long diffseconds = millisuntilfinished/1000;                          string hoursleft = string.format("%d", diffseconds / 3600);                         matchitemholder.mtimehr.settext(hoursleft + "h");                          string minutesleft = string.format("%d", ((diffseconds % 86400) % 3600) / 60);                         matchitemholder.mtimeminutes.settext(minutesleft + "m");                          string secondsleft = string.format("%d", ((diffseconds % 86400) % 3600) % 60);                         matchitemholder.mtimeseconds.settext(secondsleft + "s");                      }                      @override                     public void onfinish() {                         matchitemholder.mtimehr.settext("");                         matchitemholder.mtimeminutes.settext("match started");                         matchitemholder.mtimeseconds.settext("");                     }                 };                   //matchcounter.cancel();                 matchcounter.start();                 positionforcounter++;                   return new matchitemviewholder(matchitemlayoutview);           }     }      /**      *  replaces content in views make menu item view ,      *  native express ad view. method invoked layout manager.      */     @override     public void onbindviewholder(recyclerview.viewholder holder, int position) {          int viewtype = getitemviewtype(position);          switch (viewtype) {              case native_express_ad_view_type:                 nativeexpressadviewholder nativeexpressholder =                         (nativeexpressadviewholder) holder;                 nativeexpressadview adview =                         (nativeexpressadview) mrecyclerviewitems.get(position);                 viewgroup adcardview = (viewgroup) nativeexpressholder.itemview;                  // nativeexpressadviewholder recycled recyclerview may different                 // instance 1 used position. clear                 // nativeexpressadviewholder of subviews in case has different                 // adview associated it, , make sure adview position doesn't                 // have parent of different recycled nativeexpressadviewholder.                  adcardview.removeallviews();                   if (adview.getparent() != null) {                     ((viewgroup) adview.getparent()).removeview(adview);                 }                  // add native express ad native express ad view.                 adcardview.addview(adview);                 break;              case match_item_view_type:             default:                 final matchitemviewholder matchitemholder = (matchitemviewholder) holder;                 matcheslist match = (matcheslist) mrecyclerviewitems.get(position);                  // used pass key creating problems                 matchitemholder.itemview.settag(position);                  matchitemholder.setkeys(match);                  matchitemholder.mseriesname.settext(match.getseries());                 matchitemholder.mteam1name.settext(match.getteam1());                 matchitemholder.mteam2name.settext(match.getteam2());                  picasso.with(matchitemholder.viewholdercontext)                         .load(match.getimaget1())                         //.networkpolicy(networkpolicy.offline)                         //.placeholder(r.drawable.noimage)                         .centercrop()                         .resize(256,256)                         .into(matchitemholder.mteam1image);                  picasso.with(matchitemholder.viewholdercontext)                         .load(match.getimaget2())                         //.networkpolicy(networkpolicy.offline)                         //.placeholder(r.drawable.noimage)                         .centercrop()                         .resize(256,256)                         .into(matchitemholder.mteam2image);                 break;          }     }


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