title: AutocompleteTextview and CompletionHintView
body: <p>I'm currently implementing an autocomplete field by using the <code>AutocompleteTextView</code> component.</p>
  
  <p>I'm trying to add a completion hint with the number of results, and just want to style it differently from the dropdown list element.
  There is an attribute named <code>completionHintView</code> on the component, but every time I give it a layout I previously defined it throws a <code>NullPointerException</code>.</p>
  
  <p>Does anyone have a working example on how to style the completion hint?</p>