title: overriding a style in android
body: <p>Let's say i have a layout with style:</p>
  
  <pre><code>&lt;LinearLAyout ... &gt;
      &lt;TextView ... style=someStyle /&gt;
      &lt;ImageView ... style=someImageStyle ... /&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>the style will be defined in an xml in my project.
  How can i override that style with an external xml ? (i'm asking because i've noticed the View does not have applyStyle\setStyle or anything of that sort (best bet, because style need to be parsed, compared against android:attr for validation and then applied on each item of the view).
  I do wonder how am i suppose to make downlaodable themes for my app.</p>