title: Select an item by id in spinner with custom objects
body: <p>I have a class</p>
  
  <pre><code>zones
  int id
  String name
  </code></pre>
  
  <p>then I create a array list of this class, and set this to a arrayadapter to finaly show(name field) it  in a spinner.</p>
  
  <p>But how I select a zone programaticaly if I have the id </p>