title: how to round only top two corners in my case
body: <p>I have created a round corner drawable resource <code>round_corner_bg.xml</code>:</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;solid android:color="#FFFFFF"/&gt;
      &lt;stroke android:width="3dp" android:color="#B1BCBE" /&gt;
      &lt;corners android:radius="10dp"/&gt;
      &lt;padding android:left="0dp" android:top="0dp" android:right="0dp" android:bottom="0dp" /&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>I applied it to my <code>LinearLayout</code> :</p>
  
  <pre><code>&lt;LinearLayout ...&gt;
      android:background="@drawable/round_corner_bg"
  ...
  </code></pre>
  
  <p>It works fine. However, it rounded all four corners, how can I make it to only round the top left and top right corner?</p>