title: How to show and hide preferences on Android dynamically?
body: <p>Is there a way to dynamically show and hide preferences?  In my case, I have a checkbox preference that would disable or enable one of 2 preference groups ("with-" and "without-handicap" groups).  While this would be the ideal GUI in a desktop environment, the "with-handicap" takes up nearly the whole screen, while the other, "without-handicap" takes up only a small portion of the screen.</p>
  
  <p>Rather than showing both groups at the same time, I'd like to show only one of them at a time, and dynamically show or hide the 2 groups when the checkbox changes.  Is there a way to do this?</p>