title: Android - drawable with rounded corners at the top only
body: <p>I had this drawable to have a rounded rectangle as a background:</p>
  
  <pre><code>&lt;shape xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;solid android:color="@color/white" /&gt;
      &lt;stroke android:width="1dp" android:color="@color/light_gray" /&gt;
      &lt;padding android:left="10dp" android:top="10dp" android:right="10dp" android:bottom="10dp" /&gt;
      &lt;corners android:radius="6dp" /&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>This is working fine, as expected.</p>
  
  <p>Now, I want to change this to only round the top corners, so I change it to this:</p>
  
  <pre><code>&lt;shape xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;solid android:color="@color/white" /&gt;
      &lt;stroke android:width="1dp" android:color="@color/light_gray" /&gt;
      &lt;padding android:left="10dp" android:top="10dp" android:right="10dp" android:bottom="10dp" /&gt;
      &lt;corners android:topLeftRadius="6dp" android:topRightRadius="6dp"
               android:bottomLeftRadius="0dp" android:bottomRightRadius="0dp"/&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>But now none of the corners are rounded and I get a plain rectangle.  What am I missing here?</p>