title: Android scaledrawable doesn't seems to work
body: <p>I'm trying out the android <a href="http://developer.android.com/guide/topics/resources/drawable-resource.html#Scale" rel="noreferrer">ScaleDrawable</a></p>
  
  <p>But it doesn't seem to work... I created the xml as in the documentation example and I have a logo.png in the drawable folder</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;scale xmlns:android="http://schemas.android.com/apk/res/android"
      android:drawable="@drawable/logo"
      android:scaleGravity="center_vertical|center_horizontal"
      android:scaleHeight="80%"
      android:scaleWidth="80%" /&gt;
  </code></pre>
  
  <p>I saved this as logo2.xml in the drawable folder then I have a LinearLayout with an ImageView and set the src of the ImageView to "@drawable/logo2" but the logo doesn't appear...Am I doing something wrong here? How do you actually use the scale element?</p>