Add the Search View to the App Bar in Android -

i trying add search view app bar in android. followed tutorial:http://developer.android.com/training/search/setup.html#add-sv

but when run program, icon clicked, search view did not appear, tutorial says should appear. can me?

menu_main.xml <?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto">     <item android:id="@+id/action_search"     android:title="@string/abc_search_hint"     android:icon="@drawable/ic_search_white_48dp"     app:showasaction="ifroom|collapseactionview"     android:actionviewclass="android.widget.searchview" />     </menu>        mainactivity     public class mainactivity extends actionbaractivity { @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main); }  @override public boolean oncreateoptionsmenu(menu menu) {     menuinflater inflater = getmenuinflater();     inflater.inflate(r.menu.menu_main, menu);     return true; }  @override public boolean onoptionsitemselected(menuitem item) {      int id = item.getitemid();     if (id == r.id.action_search) {         return true;     }     return true; } 

here screenshot

xml :

<?xml version="1.0" encoding="utf-8"?>  <menu xmlns:android="http://schemas.android.com/apk/res/android"       xmlns:app="http://schemas.android.com/apk/res-auto">     <item             android:id="@+id/search"             android:title="@string/search"             android:icon="@drawable/ic_search_white"             android:textcolor="@color/white"             app:showasaction="ifroom|collapseactionview"             app:actionviewclass="android.support.v7.widget.searchview" /> </menu> 

activity

@override     public boolean oncreateoptionsmenu(menu menu) {         getmenuinflater().inflate(r.menu.search_menu, menu);         menuitem searchitem = menu.finditem(r.id.search);         final searchmanager searchmanager =                 (searchmanager) getsystemservice(context.search_service);         searchview searchview =                 (searchview) menuitemcompat.getactionview(searchitem);          searchview.setsearchableinfo(                 searchmanager.getsearchableinfo(getcomponentname()));         searchview.setonquerytextlistener(new searchview.onquerytextlistener() {             @override             public boolean onquerytextsubmit(string querytext) {                 return true;             }              @override             public boolean onquerytextchange(string newtext) {                 string newfilter = !textutils.isempty(newtext) ? newtext : null;                 if (msearchterm == null && newfilter == null) {                     return true;                 }                 if (msearchterm != null && msearchterm.equals(newfilter)) {                     return true;                 }                 msearchterm = newfilter;                 msearchquerychanged = true;                 searchtext(newtext); //handle                 return true;             }         });          menuitemcompat.onactionexpandlistener expandlistener = new menuitemcompat.onactionexpandlistener() {             @override             public boolean onmenuitemactionexpand(menuitem menuitem) {                 return true;             }              @override             public boolean onmenuitemactioncollapse(menuitem menuitem) {                  return true;             }         };         menuitemcompat.setonactionexpandlistener(searchitem, expandlistener);         return super.oncreateoptionsmenu(menu);     }