绑定菜单 xml 文件时显示此错误
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@id/menu_settings"
android:orderInCategory="100"
**at here show this error**android:showAsAction=["ifRoom" | "never" | "withText" | "always" | "collapseActionView"]
android:title="@string/menu_settings"/>