title: How can I have a drop shadow on my ActionBar (ActionBarSherlock)?
body: <p>I am including my styled xml layout:</p>
  
  <pre><code>&lt;resources xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;style name="Theme.Styled" parent="Theme.Sherlock"&gt;
          &lt;item name="actionBarStyle"&gt;@style/Widget.MyApp.ActionBar&lt;/item&gt;
          &lt;item name="android:actionBarStyle"&gt;@style/Widget.MyApp.ActionBar&lt;/item&gt;
  
      &lt;/style&gt;
  
      &lt;style name="Widget.MyApp.ActionBar" parent="Widget.Sherlock.Light.ActionBar"&gt;
          &lt;item name="titleTextStyle"&gt;@style/Widget.MyApp.TitleTextStyle&lt;/item&gt;
          &lt;item name="background"&gt;@color/red&lt;/item&gt;
          &lt;item name="android:background"&gt;@color/red&lt;/item&gt;
          &lt;item name="windowContentOverlay"&gt;@null&lt;/item&gt;
          &lt;item name="android:windowContentOverlay"&gt;@null&lt;/item&gt;
      &lt;/style&gt;
  
      &lt;style name="Widget.MyApp.TitleTextStyle" parent="TextAppearance.Sherlock.Widget.ActionBar.Title"&gt;
          &lt;item name="android:textColor"&gt;@color/white&lt;/item&gt;
          &lt;item name="android:textSize"&gt;21sp&lt;/item&gt;
      &lt;/style&gt;
  
  &lt;/resources&gt;
  </code></pre>
  
  <p>Some of the search over internet suggests that use windowContentOverlay set to @null. But when i use it in the style xml it doesn't change anything. Can any one help what to do?</p>