de>GifDrawable</code></a> or
 <a href="http://d.android.com/reference/android/graphics/drawable/BitmapDrawable.html?is-external=true" title="class or interface in android.graphics.drawable"><code>BitmapDrawable</code></a>. Specific types are always preferred so if you
 register a default transition for both <a href="http://d.android.com/reference/android/graphics/drawable/Drawable.html?is-external=true" title="class or interface in android.graphics.drawable"><code>Drawable</code></a> and
 <a href="http://d.