title: action bar showing large space between app icon and menu items
body: <p>My action bar shows the app icon on the left, then has a large space, and then shows some of my menu items on the right (the rest go into overflow).  The problem is that the "large space" is big enough to hold several more icons.  Why isn't it being used?</p>
  
  <p>My menu resource looks like this:</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_a"
      android:icon="@drawable/a"
      android:title="a"
      android:orderInCategory="100"
      android:showAsAction="ifRoom" &gt;
  
      &lt;menu&gt;
        &lt;item ... /&gt;
        ...
      &lt;/menu&gt;
    &lt;/item&gt;
    ...
    &lt;item
      android:id="@+id/menu_n"
      android:icon="@drawable/n"
      android:title="n"
      android:orderInCategory="100"
      android:showAsAction="ifRoom" &gt;
      ...
    &lt;/item&gt;
  &lt;/menu&gt;
  </code></pre>
  
  <p>In my Activity, I have:</p>
  
  <pre><code>  @Override
    public void onCreate (Bundle savedInstanceState)
    {
      super.onCreate(savedInstanceState);
  
      setContentView (R.layout.main_activity);
  
      ActionBar actionBar = getActionBar(); 
      actionBar.setDisplayShowTitleEnabled(false); 
      actionBar.setHomeButtonEnabled (true);
      ...
    }
  </code></pre>
  
  <p>and</p>
  
  <pre><code>  @Override
    public boolean onCreateOptionsMenu (Menu menu)
    {
      getMenuInflater().inflate(R.menu.nav_menu, menu);
      return true;
    }
  </code></pre>
  
  <p>I have a suspicion it has something to do with the app title (setDispalyShowTitleEnabled), which I have disabled.  Maybe I'm doing it wrong?</p>