title: Android rounding corners in layout with different radius values
body: <p>I'm trying to make an intention which has a transparent background, and a solid foreground with some basic info and rounded corners.
  Currently I can use a shape with a rounded corners if all the corners are the same radius using</p>
  
  <pre><code>&lt;corners android:radius="20dp" /&gt;
  </code></pre>
  
  <p>But if I try to have, say, just the bottom rounded like this:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;shape xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="rectangle"&gt;
  &lt;solid
  android:color="#cccccc" /&gt;
  &lt;corners android:radius="20dp" android:topLeftRadius="0dp"
      android:topRightRadius="0dp" 
      android:bottomLeftRadius="20dp"
      android:bottomRightRadius="20dp" /&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>or anything similar, then I get an error in my layout which says</p>
  
  <blockquote>
    <p>layout.xml: java.lang.UnsupportedOperationException</p>
  </blockquote>
  
  <p>any suggestions?</p>