title: how to set border bottom in action bar?
body: <p>how can i draw an actionbar bottom border like this :</p>
  
  <p><img src="https://i.stack.imgur.com/bBGNz.png" alt="enter image description here"></p>
  
  <p>i try using margin :</p>
  
  <pre><code>&lt;style name="MyActionBar"
          parent="@android:style/Widget.Holo.Light.ActionBar.Solid.Inverse"&gt;
          &lt;item name="android:titleTextStyle"&gt;@style/TitleTextStyle&lt;/item&gt;
          &lt;item name="android:background"&gt;#088A29&lt;/item&gt;
          &lt;item name="android:backgroundStacked"&gt;#088A29&lt;/item&gt;
          &lt;item name="android:backgroundSplit"&gt;#0B3B0B&lt;/item&gt;
          &lt;item name="android:layout_marginBottom"&gt;5dp&lt;/item&gt;
  </code></pre>
  
  <p>but the margin is white and i don't understand how change color</p>
  
  <p>thanks!</p>