title: Is it possible to add a custom property into a style in an android resource?
body: <p>I'm a using a view flow component into my project, which allows the dev to override some attributes, like that :</p>
  
  <pre><code>&lt;org.taptwo.android.widget.TitleFlowIndicator
      ...
      app:footerTriangleHeight="0dip"
      ... /&gt;
  </code></pre>
  
  <p>I am reusing this component into several layouts, and I would like to put the properties into a style.
  But when I'm doing this, the parser says <code>Error: No resource found that matches the given name: attr 'app:footerTriangleHeight'</code>, even if I add the namespace in the styles file.</p>
  
  <p>Is there a way to do that in android ?</p>
  
  <p>Thanks.</p>