title: Spinner not appearing in the menu bar
body: <p>I'm trying to create a spinner item in my menu bar via XML. My code is as follows, </p>
  
  <p><strong>res/layout/spinner_filter_results.xml</strong></p>
  
  <pre><code>&lt;Spinner xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:entries="@array/results_filters"/&gt;
  </code></pre>
  
  <p><strong>res/menu/menu_results.xml</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"&gt;
  
      &lt;!-- Spinner not showing up --&gt;
      &lt;item
          android:id="@+id/menuFilter"
          android:title="@string/filter"
          android:actionLayout="@layout/spinner_filter_results"
          app:showAsAction="always"&gt;
      &lt;/item&gt;
  
      &lt;item
          android:id="@+id/iconHamburger"
          android:icon="@drawable/ic_menu_white_24dp"
          app:showAsAction="ifRoom|withText"
          android:title="@string/options"&gt;
          &lt;menu&gt;
              &lt;item
                  android:id="@+id/menu_settings"
                  android:title="@string/settings"
                  android:onClick="onMenuItemClick"&gt;&lt;/item&gt;
              &lt;item
                  android:id="@+id/menu_logout"
                  android:title="@string/log_out"
                  android:onClick="onMenuItemClick"&gt;&lt;/item&gt;
          &lt;/menu&gt;
      &lt;/item&gt;
  &lt;/menu&gt;
  </code></pre>
  
  <p>This shows up fine in the Android Studio designer, this is exactly what I want:</p>
  
  <p><a href="https://i.stack.imgur.com/wdfgs.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wdfgs.jpg" alt="Menu bar in Android Studio"></a></p>
  
  <p>But on my phone it doesn't show up.</p>
  
  <p><a href="https://i.stack.imgur.com/IzMxW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IzMxW.png" alt="Menu bar on phone"></a></p>
  
  <p>I've looked to other Stack Overflow posts such as this <a href="https://stackoverflow.com/questions/8312344/how-to-add-a-dropdown-item-on-the-action-bar">one</a>, but I still can't figure out why the above code doesn't work. Does anyone have any insight as to why it doesn't show up on my phone? Is this just a problem of my phone?(LG G4, Android 6.0, SDK 23)</p>
  
  <p><strong>EDIT 1:</strong>
  I turned on Show Layout Bounds on my phone. I see that the Menu item for the Spinner exists but it seems to be empty?</p>
  
  <p><a href="https://i.stack.imgur.com/SSbDi.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SSbDi.png" alt="Empty Menu Item"></a> </p>