how to hide selected item from spinner list in android -

i want hide selected item list of spinner questions hide selected item custom spinner list didn't answer. want question in link code is....

toolbar.xml      <android.support.v7.widget.toolbar xmlns:android="http://schemas.android.com/apk/res/android"         xmlns:app="http://schemas.android.com/apk/res-auto"         xmlns:tools="http://schemas.android.com/tools"         android:id="@+id/toolbar"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:background="?attr/colorprimarydark"         android:minheight="?attr/actionbarsize"         app:popuptheme="@style/themeoverlay.appcompat.light"          >          <spinner             android:id="@+id/spinner_nav"             android:layout_width="wrap_content"             android:layout_height="wrap_content" />      </android.support.v7.widget.toolbar>  toolbaractivity      <?xml version="1.0" encoding="utf-8"?>     <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:background="#c9c9c9"         android:orientation="vertical" >          <include             android:id="@+id/toolbar"             layout="@layout/spintoolbar" />       </linearlayout>  spinneradapter      public class customspinneradapter extends arrayadapter<string> {       private context context1;      private arraylist<string> data;      public resources res;      layoutinflater inflater;       public customspinneradapter(context context, arraylist<string> objects) {       super(context, r.layout.spinner_row, objects);        context1 = context;       data = objects;        inflater = (layoutinflater) context1         .getsystemservice(context.layout_inflater_service);       }       @override      public view getdropdownview(int position, view convertview, viewgroup parent) {       return getcustomview(position, convertview, parent);      }       @override      public view getview(int position, view convertview, viewgroup parent) {       return getcustomview(position, convertview, parent);      }       // funtion called each row ( called data.size() times )      public view getcustomview(int position, view convertview, viewgroup parent) {        view row = inflater.inflate(r.layout.spinner_row, parent, false);        textview tvcategory = (textview) row.findviewbyid(r.id.tvcategory);        tvcategory.settext(data.get(position).tostring());        return row;      }     }    spinner_row.xml   <?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_margin="5dp"    android:background="@drawable/spinner_selector"     android:orientation="vertical" >      <textview         android:id="@+id/tvcategory"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_margin="10dp"         android:textsize="18sp"         />  </relativelayout>   spinneracivity          public class spintoolbaractivity extends appcompatactivity {           private toolbar toolbar;           private spinner spinner_nav;           @override          protected void oncreate(bundle savedinstancestate) {           super.oncreate(savedinstancestate);           setcontentview(r.layout.spintoolbaractivity);           toolbar = (toolbar) findviewbyid(r.id.toolbar);           spinner_nav = (spinner) findviewbyid(r.id.spinner_nav);            if (toolbar != null) {            setsupportactionbar(toolbar);            getsupportactionbar().setdisplayshowtitleenabled(false);            }           additemstospinner();           }           // add items spinner dynamically          public void additemstospinner() {            arraylist<string> list = new arraylist<string>();           list.add("top news");           list.add("politics");           list.add("business");           list.add("sports");           list.add("movies");            // custom arrayadapter spinner item layout set popup background            customspinneradapter spinadapter = new customspinneradapter(             getapplicationcontext(), list);           spinner_nav.setadapter(spinadapter);            spinner_nav.setonitemselectedlistener(new onitemselectedlistener() {             @override            public void onitemselected(adapterview<?> adapter, view v,              int position, long id) {             // on selecting spinner item             string item = adapter.getitematposition(position).tostring();              // showing selected spinner item             toast.maketext(getapplicationcontext(), "selected  : " + item,               toast.length_long).show();            }             @override            public void onnothingselected(adapterview<?> arg0) {             // todo auto-generated method stub             }           });           }           @override          public boolean oncreateoptionsmenu(menu menu) {           // inflate menu; adds items action bar if present.           getmenuinflater().inflate(r.menu.main, menu);           return true;          }         } 

       final arraylist<string> lastpressed = new arraylist<>();     final boolean[] isfirsttime = {true};     lastpressed.add(0,string.valueof(0)); // last pressed position     lastpressed.add(1,"a");       ...         spinner_nav.setonitemselectedlistener(new onitemselectedlistener() {         @override        public void onitemselected(adapterview<?> adapter, view v,          int position, long id) {        ...        spinadapter.remove(list.get(position));             if(!isfirsttime[0]){                 spinadapter.insert(lastpressed.get(1), new integer(lastpressed.get(0)));             } else {                 isfirsttime[0] = false;             }               string selected = ((textview) view.findviewbyid(r.id.tv)).gettext().tostring();             lastpressed.set(0, string.valueof(position));             lastpressed.set(1, selected);               spinadapter.notifydatasetchanged();         }