title: Android: How to only rotate the drawable part of an imageView?
body: <p>I have an ImageView object where both its Background and drawable attributes are set.
  I need to animate the drawable part of the ImageView while the background stay still.</p>
  
  <p>I can't find a way to do it...</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;rotate xmlns:android="http://schemas.android.com/apk/res/android"
      android:interpolator="@android:anim/linear_interpolator"
      android:drawable="@drawable/ic_popup_sync_1"
      android:fromDegrees="0"
      android:pivotX="50%"
      android:pivotY="50%"
      android:repeatCount="infinite"
      android:duration="1200"
      android:toDegrees="360" /&gt;
  </code></pre>
  
  <p>imageView.startAnimation(AnimationUtils.loadAnimation(context, animId));</p>
  
  <p>Both the drawable and the background are rotating at the same time...</p>