title: Have the split ActionBar display twice as many icons
body: <p>I'd like to have an app layout as the one they used for Gmail. They have the actionbar that has icons (on my device it has the app logo for up navigation, and a custom view for selecting priority inbox/inbox/etc), but there is also some kind of split <code>ActionBar</code> because at the bottom I have several icons (compose, search, labels, etc).</p>
  
  <p>How could I do this? I have implemented the following <code>ActionBar</code> through this XML:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;menu xmlns:android="http://schemas.android.com/apk/res/android" &gt;
  
      &lt;item
          android:id="@+id/menu_gps"
          android:icon="@drawable/icone_gps_continu"
          android:showAsAction="always"
          android:title="@string/menu_gps"/&gt;
      &lt;item
          android:id="@+id/menu_sort"
          android:icon="@drawable/icone_liste_chron"
          android:showAsAction="always"
          android:title="@string/menu_liste"/&gt;
      &lt;item
          android:id="@+id/menu_stats"
          android:icon="@drawable/icone_statistiques"
          android:showAsAction="always"
          android:title="@string/menu_stats"/&gt;
      &lt;item
          android:id="@+id/menu_save"
          android:icon="@drawable/icone_terminersortie"
          android:showAsAction="always"
          android:title="@string/menu_save"/&gt;
      &lt;item
          android:id="@+id/menu_search"
          android:icon="@drawable/ic_launcher"
          android:showAsAction="always"
          android:title="@string/menu_search"/&gt;
      &lt;item
          android:id="@+id/menu_photo"
          android:icon="@drawable/icone_enregistrerphoto"
          android:showAsAction="always"
          android:title="@string/menu_photo"&gt;
      &lt;/item&gt;
      &lt;item
          android:id="@+id/menu_sound"
          android:icon="@drawable/icone_enregistrerson"
          android:showAsAction="always"
          android:title="@string/menu_sound"&gt;
      &lt;/item&gt;
      &lt;item
          android:id="@+id/menu_settings"
          android:icon="@drawable/icone_parametres"
          android:showAsAction="always"
          android:title="@string/menu_settings"&gt;
      &lt;/item&gt;
  
  &lt;/menu&gt;
  </code></pre>
  
  <p>And I have of course enabled the split <code>ActionBar</code> by adding <code>android:uiOptions="splitActionBarWhenNarrow"</code> to my <code>&lt;application&gt;</code> tag in the manifest.</p>
  
  <p>What I get though is an empty "top" <code>ActionBar</code>; and the bottom one is displaying only three icons. I thought I could display like 3-4 icons at the top and 5 at the bottom in portait mode, and all of them at the top in landscape mode.</p>
  
  <p>Note: even if I'm testing on ICS with my Galaxy Nexus, I'm using ActionBarSherlock in order to provide backward compatibility.</p>