title: Gradient Radius as percentage of screen size
body: <p>I'm trying to create a shape drawable with radial gradient background, with radius that will adjust to the screen size (take a look at the relevant <a href="http://developer.android.com/reference/android/graphics/drawable/GradientDrawable.html#attr_android:gradientRadius" rel="noreferrer">documentation</a>).</p>
  
  <p>This is my code:</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;gradient
          android:endColor="#000"
          android:gradientRadius="50%p"
          android:startColor="#5d2456"
          android:type="radial" /&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>But it doens't seem to work. if I remove the "%p", it works, but then the radius will be static, thus not adjusting to the screen size...Any idea what's wrong?</p>