title: How to change action bar size
body: <p>I would like to change the action bar size. I have tried the following coding.</p>
  
  <pre><code>&lt;style name="MyTheme" parent="@android:style/Theme.Holo.Light"&gt;
      &lt;item name="android:actionBarStyle"&gt;@style/CustomActionBar&lt;/item&gt;
  &lt;/style&gt;
  &lt;style name="CustomActionBar" parent="@android:style/Widget.Holo.Light.ActionBar"&gt;
      &lt;!--  &lt;item name="android:background"&gt;@drawable/action_bar_style&lt;/item&gt; --&gt;
      &lt;item name="android:actionBarSize"&gt;15dp&lt;/item&gt;
      &lt;item name="android:background"&gt;@drawable/header_bar&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>But the action bar size didn't change. Is there another way? I am using api level 11.</p>
  
  <p>Thanks.</p>