<?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/setting"
          android:title="设置"
          app:showAsAction="always"/>
  </menu>