title: ListView redraws background color whenever I scroll
body: <p>I have defined a custom theme, where I am drawing a dark gradient on my window background. My ListView background is set to be transparent, however whenever I scroll, the background color turns black, and then after scrolling has stopped, goes back to the gradient color. Why is this?</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
      &lt;resources&gt;
        &lt;!-- Base application theme is the default theme. --&gt;
        &lt;style name="Theme" parent="android:Theme"&gt;
        &lt;/style&gt;
  
        &lt;!-- Variation on our application theme that has a translucent
       background. --&gt;
        &lt;style name="Theme.DarkGradient"&gt;
          &lt;item name="android:windowBackground"&gt;@drawable/dark_gradient&lt;/item&gt;
  
        &lt;/style&gt;
  
      &lt;/resources&gt;
  </code></pre>