title: Gradient type error
body: <p>I am trying to create a glow effect by using a gradient.</p>
  
  <p>In my XML I have this...</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt;
  
  &lt;item android:state_pressed="true"&gt;
      &lt;shape&gt;
          &lt;solid android:color="#7AD8FF" /&gt;
  
          &lt;gradient android:startColor="@android:color/transparent" android:endColor="#7AD8FF" android:type="radial"/&gt;
  
          &lt;stroke android:width="0dp"  android:color="#7AD8FF"/&gt;
  
          &lt;corners android:radius="20dp" /&gt;
  
          &lt;padding android:bottom="10dp" android:left="10dp" android:right="10dp" android:top="10dp" /&gt;
      &lt;/shape&gt;
  &lt;/item&gt;
  &lt;item&gt;
      &lt;shape&gt;
          &lt;solid android:color="@android:color/transparent"/&gt;
  
          &lt;stroke android:width="0dp" android:color="#D1D1D1" /&gt;
  
          &lt;corners android:radius="0dp" /&gt;
  
          &lt;padding android:bottom="10dp" android:left="10dp" android:right="10dp" android:top="10dp" /&gt;
      &lt;/shape&gt;
  &lt;/item&gt;
  </code></pre>
  
  <p></p>
  
  <p>When I try to set "android:type="radial"", it causes an error...</p>
  
  <p>...Any ideas?</p>