title: Android: Using linear gradient as background looks banded
body: <p>I'm trying to apply a linear gradient to my ListView.
  This is the content of my drawable xml:</p>
  
  <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;shape xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;gradient 
          android:startColor="#3A3C39" 
          android:endColor="#181818"
          android:angle="270"
       /&gt;
      &lt;corners android:radius="0dp" /&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>So I apply it to my ListView with:</p>
  
  <pre><code>android:background="@drawable/shape_background_grey"
  </code></pre>
  
  <p>It works but it looks very "banded" on emulator and on a real device too.</p>
  
  <p>Is there any way to reduce this "behaviour"?</p>