title: How to set a shape's background in xml?
body: <p>I just created a red circle using android shapes:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;shape xmlns:android="http://schemas.android.com/apk/res/android"
      android:innerRadiusRatio="4"
      android:shape="ring"
      android:thicknessRatio="9"
      android:useLevel="false" &gt;
  
       &lt;solid android:color="#FF0000" /&gt;
  
      &lt;size
          android:height="48dip"
          android:width="48dip" /&gt;
  
  &lt;/shape&gt;
  </code></pre>
  
  <p>This is really cool, but I cannot set the background color of the circle to my color. I tried <code>android:background="#FFFFFF"</code> but it always appear to be black in my layout. How can I set the background of the above shape?</p>