sheishuoAPP/uikit/res/menu/contacts_search_menu.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"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="im.yixin.activity.WelcomeActivity" >

    <item
        android:id="@+id/action_search"
        android:icon="@drawable/nim_actionbar_search_dark_icon"
        android:title="@string/search"
        app:showAsAction="always"
        app:actionViewClass="android.support.v7.widget.SearchView"/>

</menu>