title: Unable to scale Drawable with ScaleDrawable
body: <p>Scaling with ScaleDrawable is not working for me.<br>
  The drawable is remained in the same size.</p>
  
  <pre><code>LayerDrawable layerDrawable = new LayerDrawable(layers);        
  Drawable d = layerDrawable.getCurrent();
  ScaleDrawable sd = new ScaleDrawable(d, 0, 0.01f, 0.01f); 
  return sd.getDrawable();
  </code></pre>
  
  <p>What i need to do to fix it?<br>
  Thanks.</p>