title: android: shape corners do not work when setting individual corners
body: <p>I need to have a background which has rounded bottom left/right coners(but not top left/right ones), below is my xml file:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;layer-list
  xmlns:android="http://schemas.android.com/apk/res/android"&gt;
  &lt;item&gt;
      &lt;shape android:shape="rectangle" android:padding="1dp"&gt;
          &lt;solid android:color="#FFbdbebd"/&gt;
          &lt;corners
              android:bottomLeftRadius="12dip"
              android:bottomRightRadius="12dip"
              android:topLeftRadius="0dip"
              android:topRightRadius="0dip"/&gt;
      &lt;/shape&gt;
  &lt;/item&gt;
  &lt;/layer-list&gt;
  </code></pre>
  
  <p>But the result is a plain rectangle without any corner rounded, if I only use:</p>
  
  <pre><code>android:radius="12dip"
  </code></pre>
  
  <p>then all corners are rounded, I searched and found a bug related to this:</p>
  
  <p><a href="http://code.google.com/p/android/issues/detail?id=9161">http://code.google.com/p/android/issues/detail?id=9161</a></p>
  
  <p>but the bug states:</p>
  
  <blockquote>
    <p>Left/right is switched, because android:bottomRightRadius="2dp" turned out to specify left-bottom rounded corner.</p>
  </blockquote>
  
  <p>which may not be relavent to my issue, I also tried to use:</p>
  
  <pre><code>android:radius="12dip"
  </code></pre>
  
  <p>followed by</p>
  
  <pre><code>android:topLeftRadius="0dip"
  android:topRightRadius="0dip"
  </code></pre>
  
  <p>without success.</p>
  
  <p>Can anyone help? Thanks!</p>