title: Use appropriate colors irrespective of themes
body: <p>I want my activity to have two possible themes, say <code>Theme_Holo</code> and <code>Theme_Holo_Light</code>, as selected by the user. I need to programmatically draw things like horizontal dividers in this activity. The color of the divider should depend on the selected theme. How can I do that easily?</p>
  
  <p>Ideally there should be a name for the standard color of a divider irrespective of the theme used, and the actual RGB realization of that color name would match the selected theme automatically. Is there such thing? It seems unlikely to me that the programmer needs to hardcode RBG values.</p>
  
  <p>Of course, the divider is only an example. I would also like to name the color of EditText, or other widgets, in a way that does not depend on the theme.</p>