android - when Selecting dynamic Tabs Recycler view not showing -


i'm having parent fragment class name "startupfragement" conatains dynamic tab more 20 .when i'm swiping tab recycler view list show when select tab (for eg 'm on position 1 , select 3 not showing recycler view list)

i'm getting message 3 times "e/recyclerview: no adapter attached; skipping layout"

public class startupfragement extends fragment implements view.onclicklistener {         @override     public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {          view rootview = inflater.inflate(r.layout.fragment_startup, container, false);         search_listview = (listview) rootview.findviewbyid(r.id.search_listview);         searchadapter = new searchcompanyadpter(mactivity, searchedarray,"startup");         search_listview.setadapter(searchadapter);            tab1fragemnt.firsttime=0;         notificationivisible=false;         progressbar();          iscurrentfragment = true;         viewpager_new = (viewpager) rootview.findviewbyid(r.id.viewpager_new);         setupviewpagerstrup(viewpager_new);            tab_scrollable = (tablayout) rootview.findviewbyid(r.id.tab_scrollable);         tab_scrollable.setupwithviewpager(viewpager_new);           edt_search = (edittext) rootview.findviewbyid(r.id.edt_search);         btn_search = (button) rootview.findviewbyid(r.id.btn_search);         btn_search.setonclicklistener(this);          notification_linearlayout = (linearlayout) rootview.findviewbyid(r.id.notification_linearlayout);         notification_linearlayout.setonclicklistener(this);           cancel_search = (button) rootview.findviewbyid(r.id.cancel_search);         cancel_search.setonclicklistener(this);          int tab_position = startupfragement.tab_scrollable.getselectedtabposition();          if(tab_position>=0) {             titlename = (string) startupfragement.viewpager_new.getadapter().getpagetitle(tab_position);         }         return rootview;     }  private  void progressbar()  {      progress_bar_startup_dialog=new dialog(mactivity);      progress_bar_startup_dialog.requestwindowfeature (window.feature_no_title);      progress_bar_startup_dialog.setcontentview (r.layout.dialog_progress);      progress_bar_startup_dialog.getwindow ().setbackgrounddrawableresource (android.r.color.transparent);      progress_bar_startup_dialog.setcancelable(false);  }       private void setupviewpagerstrup(viewpager viewpagerstatup) {         adapterstrup = new pagerstateadapter(getchildfragmentmanager());         viewpagerstatup.setadapter(adapterstrup);         if (industries.size() > 1 ) {             tab1fragemnt.tab_position = 0;              set<string> arr = industries.keyset();             arraylist<string> industryname = new arraylist<string>(arr);             adapterstrup.addfragment(new tab1fragemnt(), "latest");               (int = 0; < industryname.size(); i++) {                  if(!industryname.get(i).equals("latest"))                     adapterstrup.addfragment(new tab1fragemnt(), industryname.get(i));                 //tab1fragemnt.tabdata.put(titlename, new arraylist<feedmodel>());             }         }          adapterstrup.notifydatasetchanged();      }       *@override     public void onclick(view v) {          switch (v.getid()) {             case r.id.btn_search:                 btn_search.setvisibility(view.gone);                 cancel_search.setvisibility(view.visible);                 edt_search.setvisibility(view.visible);                 edt_search.requestfocus();                  inputmethodmanager imm = (inputmethodmanager) mactivity.getsystemservice(context.input_method_service);                 imm.showsoftinput(edt_search, inputmethodmanager.show_implicit);                 break;              case r.id.notification_linearlayout:                 if(!notificationivisible) {                     sortbydialog.show();                     notificationivisible=true;                 }                 else                 {                     notificationivisible=false;                     sortbydialog.dismiss();                 }                 break;             case r.id.cancel_search:                  btn_search.setvisibility(view.visible);                  cancel_search.setvisibility(view.gone);                 edt_search.settext("");                 edt_search.setvisibility(view.gone);                  view view = mactivity.getcurrentfocus();                 if (view != null) {                     inputmethodmanager = (inputmethodmanager) mactivity.getsystemservice(context.input_method_service);                     i.hidesoftinputfromwindow(view.getwindowtoken(), 0);                 }                  previoussearchstring = "";                 searchstring = "";                  if (!searchdataarray.isempty()) {                     searchdataarray.clear();                 }                 if (!searchedarray.isempty()) {                     searchedarray.clear();                 }                  issearchcompany = false;                  search_listview.setvisibility(view.gone);                 tab_scrollable.setvisibility(view.visible);                 viewpager_new.setvisibility(view.visible);                 break;          }       }        @override     public void ondestroy() {         super.ondestroy();     }     @override     public void onattach(activity activity) {         super.onattach(activity);         mactivity = activity;     } }* 

public class tab1fragemnt extends fragment {

    recyclerview following_recycleview;     jsonobject object = null;     fragmentactivity mactivity;      startupadapter madapter;     string titlename = "";     static int tab_position = 0;     static int firsttime=0;      public static hashmap<string, arraylist<feedmodel>> tabdata = new hashmap<string, arraylist<feedmodel>>();     dialog progress_bar_dialog;     string industry_id="";    // textview text;      @override     public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {         // view rootview = inflater.inflate(r.layout.fragment_tab1, container, false);         view rootview = inflater.inflate(r.layout.fragment_tab1,null);         following_recycleview = (recyclerview) rootview.findviewbyid(r.id.followcompany_recycler_view);              //text=(textview)rootview.findviewbyid(r.id.settitle);          //following_recycleview.setlayoutmanager(new linearlayoutmanager(getcontext(), linearlayoutmanager.vertical, false));           int spacinginpixels = 10;         following_recycleview.additemdecoration(new spacesitemdecoration(spacinginpixels));          changeviewpager();         if(firsttime==0)         {             progressbar();          } else         {             progressbar();         }          if(tab_position==0)         {              setlist();         }           mactivity.getsupportfragmentmanager().addonbackstackchangedlistener(new fragmentmanager.onbackstackchangedlistener() {             @override             public void onbackstackchanged() {                 if(madapter != null)                 {                     madapter.notifydatasetchanged();                 }             }         });         return rootview;     }      private  void progressbar()     {         if(progress_bar_dialog != null)         {             if(progress_bar_dialog.isshowing())             {                 progress_bar_dialog.dismiss();             }         }         progress_bar_dialog=new dialog(mactivity);         progress_bar_dialog.requestwindowfeature (window.feature_no_title);         progress_bar_dialog.setcontentview (r.layout.dialog_progress);         progress_bar_dialog.getwindow ().setbackgrounddrawableresource (android.r.color.transparent);         progress_bar_dialog.setcancelable(false);       }       private void changeviewpager()     {          startupfragement.tab_scrollable.setontabselectedlistener(new tablayout.ontabselectedlistener() {             @override             public void ontabselected(tablayout.tab tab) {                log.e("tabposi",string.valueof(tab.getposition()));                  tab_position = tab.getposition();                 startupfragement.viewpager_new.setcurrentitem(tab_position,true);                 setlist();               }              @override             public void ontabunselected(tablayout.tab tab) {              }              @override             public void ontabreselected(tablayout.tab tab) {                 tab_position = tab.getposition();                 startupfragement.viewpager_new.setcurrentitem(tab_position);             }         });     }       private class json_parse extends asynctask<string,string,string> {         string tag = "";          @override         protected void onpreexecute() {          }          @override         protected string doinbackground(string... params) {             //string val= serverurl.feedlist(loginacitivty.this);             tag = params[0];             string val = "";              if (tag.equals(constants.latest_company_list)) {                 val = serverurl.latestcompany(mactivity,20);             } else if (tag.equals(constants.other_latest_company_list)) {                 val = serverurl.companylatestcategorieslist(mactivity,industry_id);             }             return val;         }          @override         protected void onpostexecute(string values) {             try {                  if(values!="")                 {                     if(tag.equals(constants.latest_company_list))                     {                             object=null;                             object= new jsonobject(values);                             object=object.getjsonobject("data");                          jsonarray json=object.getjsonarray("companies");                          if(json!=null) {                              if (firsttime == 1) {                                 firsttime = 2;                                 if (progress_bar_dialog == null) {                                     progressbar();                                 }                                 progress_bar_dialog.show();                             }                              (int k = 0; k < json.length(); k++) {                                 object=json.getjsonobject(k);                                    // jsonobject json = object;                                 string doc = object.getstring("_id");                                 boolean check = true;                                 string industrytypename = "latest";                                 arraylist<feedmodel> feed = new arraylist<feedmodel>();                                   if (tabdata.isempty()) {                                     check = false;                                 } else {                                      feedmodel d = null;                                      if (tabdata.get(industrytypename) != null) {                                         feed = tabdata.get(industrytypename);                                         (int = 0; < feed.size(); i++) {                                             d = (feedmodel) feed.get(i);                                             if ((d.getdocumentid()).equals(doc)) {                                                 check = false;                                                 break;                                             }                                         }                                     } /*else {                                         tabdata.put(industrytypename, new arraylist<feedmodel>());                                     }*/                                 }                                  if (check) {                                     feedmodel model = new feedmodel();                                     model.setdocumentid(doc);                                     if (object.has("slug")) {                                         model.setslug(object.getstring("slug"));                                     } else {                                         model.setslug("");                                     }                                      model.setcompanyname(object.getstring("name"));                                     if (object.has("valuation")) {                                         model.setcompanyvaluation(utlis.truncatenumber(object.getstring("valuation")));                                     } else {                                         model.setcompanyvaluation("");                                     }                                        feed.add(model);                                       tabdata.put(industrytypename, feed);                                   }                             }                               if(tabdata.get(titlename) != null) {                                 collections.sort(tabdata.get(titlename), new comparator<feedmodel>() {                                     public int compare(feedmodel s1, feedmodel s2) {                                         return s1.getcompanyname().comparetoignorecase(s2.getcompanyname());                                     }                                 });                             }                              //   setlistadapter();                             following_recycleview.removeallviews();                             following_recycleview.invalidate();                            // madapter=null;                             madapter = new startupadapter(mactivity, tabdata.get(titlename));                             following_recycleview.setadapter(madapter);                             if(madapter!=null)                                 madapter.notifydatasetchanged();                                if (progress_bar_dialog.isshowing()) {                                 progress_bar_dialog.dismiss();                             }                          }                      }                     else if (tag.equals(constants.other_latest_company_list))                     {                          object=null;                         object= new jsonobject(values);                         object=object.getjsonobject("data");                          jsonarray json=object.getjsonarray("companies");                          if(json!=null)                         {                             for(int k=0;k<json.length();k++)                             {                                  //for except latest                                 // if users have companies list                                 //industry name                                  object=json.getjsonobject(k);                                 boolean check = true;                                 string doc = object.getstring("_id");                                  // jsonobject obj = object;                                 string industrytypename = "";                                 arraylist<feedmodel> feed = new arraylist<feedmodel>();                                  if (object.has("industry")) {                                     // jsonobject js = new jsonobject(obj.getstring("industry"));                                     jsonobject js = object.getjsonobject("industry");                                     if (js.has("name")) {                                         industrytypename = js.getstring("name");                                      }                                 }                                   if (tabdata.isempty()) {                                     check = false;                                 } else {                                      if (tabdata.get(industrytypename) != null) {                                         feed = tabdata.get(industrytypename);                                          (int = 0; < feed.size(); i++) {                                             feedmodel d = null;                                             d = (feedmodel) feed.get(i);                                             if ((d.getdocumentid()).equals(doc)) {                                                 check = false;                                                 break;                                             }                                         }                                     }                                 }                                  if (check) {                                     feedmodel model = new feedmodel();                                     model.setdocumentid(doc);                                     model.setindustrysectorname(industrytypename);                                     model.setslug(object.getstring("slug"));                                        feed.add(model);                                     tabdata.put(industrytypename, feed);                                  }                             }                               if (tabdata.get(titlename) != null) {                                 collections.sort(tabdata.get(titlename), new comparator<feedmodel>() {                                     public int compare(feedmodel s1, feedmodel s2) {                                         return s1.getcompanyname().comparetoignorecase(s2.getcompanyname());                                     }                                 });                             }                             // madapter=null;                              following_recycleview.removeallviews();                             following_recycleview.invalidate();                             // madapter.notifydatasetchanged();                             log.e(titlename, "onpostexecute: "+ titlename);                             log.e("array values", "onpostexecute: "+ tabdata.get(titlename).tostring());                              madapter = new startupadapter(mactivity, tabdata.get(titlename));                            following_recycleview.setadapter(madapter);                              if (madapter!=null)                            madapter.notifydatasetchanged();                               if (progress_bar_dialog.isshowing()) {                                 progress_bar_dialog.dismiss();                             }                         }                      }                 }                 else                 {                     utlis.showtoastlong("please check network connection",mactivity);                      if (tag.equals(constants.latest_company_list)) {                         if (progress_bar_dialog.isshowing()) {                             progress_bar_dialog.dismiss();                         }                     } else if (tag.equals(constants.other_latest_company_list)) {                         if (progress_bar_dialog.isshowing()) {                             progress_bar_dialog.dismiss();                         }                     }                 }             } catch (exception e) {              }         }     }      private void checklogin(final boolean isother)     {         try {                 if(isother) {                     new json_parse().execute(constants.other_latest_company_list);                 }                 else                 {                     new json_parse().execute(constants.latest_company_list);                 }          }         catch (exception e)         {             if(progress_bar_dialog!= null &&progress_bar_dialog.isshowing())             {                 progress_bar_dialog.dismiss();             }         }     }       private void setlist()     {         system.gc();         titlename = (string) startupfragement.viewpager_new.getadapter().getpagetitle(tab_position);         if (!titlename.equals("latest")) {              if(titlename != "latest") {                 industry_id = startupfragement.industries.get(titlename);             }              if (titlename.equals("3d printing/scanning")) {                 titlename = "3d printing";             }              following_recycleview.removeallviews();             following_recycleview.invalidate();             // madapter=null;             madapter = new startupadapter(mactivity, tabdata.get(titlename));             following_recycleview.setadapter(madapter);              if (tabdata.get(titlename)==null || tabdata.get(titlename).isempty()) {                  try {                     // if (!isrunning) {                        // isrunning=true;                         if (progress_bar_dialog.isshowing()) {                             progress_bar_dialog.dismiss();                         }                         progress_bar_dialog.show();                         if (utlis.checknetworkconnection(mactivity)) {                             checklogin(true);                      } else {                         utlis.showtoastshort(getresources().getstring(r.string.check_netconnection), mactivity);                         if (progress_bar_dialog.isshowing()) {                             progress_bar_dialog.dismiss();                             }                         }                     //}                 }                 catch (exception e)                 {                      if(progress_bar_dialog!= null &&progress_bar_dialog.isshowing())                     {                         progress_bar_dialog.dismiss();                     }                     following_recycleview.removeallviews();                     following_recycleview.invalidate();                     if(madapter!=null)                     madapter.notifydatasetchanged();                 }              } else {                 if (progress_bar_dialog.isshowing()) {                     progress_bar_dialog.dismiss();                 }                 following_recycleview.removeallviews();                 following_recycleview.invalidate();                 if(madapter!=null)                 madapter.notifydatasetchanged();             }         } else {              if (tabdata.get(titlename)==null || tabdata.get(titlename).isempty()) {                 if(firsttime==0)                 {                     firsttime=1;                     try {                          if (progress_bar_dialog.isshowing()) {                             progress_bar_dialog.dismiss();                         }                          progress_bar_dialog.show();                         if(utlis.checknetworkconnection(mactivity)) {                             checklogin(false);                         }                         else                         {                             utlis.showtoastshort(getresources().getstring(r.string.check_netconnection),mactivity);                              following_recycleview.removeallviews();                             following_recycleview.invalidate();                           //  madapter=null;                             madapter = new startupadapter(mactivity, tabdata.get(titlename));                             following_recycleview.setadapter(madapter);                             if(madapter!=null)                             madapter.notifydatasetchanged();                               if (progress_bar_dialog.isshowing()) {                                 progress_bar_dialog.dismiss();                             }                          }                     } catch (exception e) {                         if (progress_bar_dialog.isshowing()) {                             progress_bar_dialog.dismiss();                         }                     }                 }             } else {                 if (progress_bar_dialog.isshowing()) {                     progress_bar_dialog.dismiss();                 }                 following_recycleview.removeallviews();                 following_recycleview.invalidate();               //  madapter=null;                 madapter = new startupadapter(mactivity, tabdata.get(titlename));                 following_recycleview.setadapter(madapter);                  if(madapter!=null)                 madapter.notifydatasetchanged();               }         }      }       @override     public void onattach(activity activity) {         super.onattach(activity);         mactivity = getactivity();      }  } 


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