xml - Android Action bar not showing Icons -

how can display icons in actions bar, here code,

<?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_icon"     android:icon="@drawable/ic_action_search"     android:showasaction="always"     android:orderincategory="0"     android:title="search" > </item> </menu> 

and

@override public boolean oncreateoptionsmenu(menu menu){     menuinflater mif = getmenuinflater();     mif.inflate(r.menu.custom_action_bar,menu);     return super.oncreateoptionsmenu(menu); } 

thanks !

if using app compat use app:showasaction

<item android:id="@+id/search_icon"     android:icon="@drawable/ic_action_search"     app:showasaction="always"     android:orderincategory="100"     android:title="search" > </item>