title: No Resource Identifier found for attribute 'menu'
body: <p>I'm trying to implement a navigation drawer into my app, but when I try to reference my '@menu/navigationdraweritems' file, I get the error:</p>
  
  <pre><code>Error:(26) No resource identifier found for attribute 'menu' in package 'com.t99sdevelopment.centralized'
  </code></pre>
  
  <p>Here's my XML...</p>
  
  <pre><code>&lt;android.support.v4.widget.DrawerLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:id="@+id/drawer_layout"
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  
      &lt;LinearLayout
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:orientation="vertical"&gt;
  
          &lt;include
              layout="@layout/toolbar"
              android:layout_width="match_parent"
              android:layout_height="wrap_content" /&gt;
  
          &lt;FrameLayout
              android:id="@+id/flContent"
              android:layout_width="match_parent"
              android:layout_height="match_parent" /&gt;
      &lt;/LinearLayout&gt;
  
      &lt;android.support.design.widget.NavigationView
          android:id="@+id/nvView"
          android:layout_width="wrap_content"
          android:layout_height="match_parent"
          android:layout_gravity="start"
          android:background="@android:color/white"
          app:menu="@menu/navigationdraweritems" /&gt;
  &lt;/android.support.v4.widget.DrawerLayout&gt;
  </code></pre>
  
  <p>Also...</p>
  
  <pre><code>My gradle dependency: com.android.support:appcompat-v7:23.1.0
  </code></pre>
  
  <p>Any thoughts?</p>