Android 分析XML未绑定前缀行5时出错

我的android代码出错了…我做错了什么？谢谢

        <?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="Search"
            android:icon="@android:drawable/ic_menu_search"
         andorid:actionProviderClass="android.support.v7.widget.SearchActionProvider"
         app:showAsAction="always|collapseActionView"
          app:actionViewClass="android.support.v7.widget.SearchView" 
         app:actionProviderClass="android.support.v7.widget.SearchActionProvider" />
         </menu>

ANDROID中的输入错误：actionProviderClass。应该是android:actionProviderClass