title: After changing a preference (a setting), text showing settings doesn't update
body: <p>I will try to explain a simple app scenario: My app goes right to a 'main view'. In this main view I have inserted a <code>TextView</code> which displays current settings created by way of the <code>PreferenceManager</code>. For simplicity sake, let's say I have a checkbox in my settings. When I first start my app - the <code>TextView</code> on my main view shows my checkbox setting correctly (true). Now I go to the settings menu, it pops-up, and then I change it to false. I go back to the main view and see no change. It still say's true even after I changed it to false. If I end the app and then re-start it - all is well and it shows my change.</p>
  
  <p>Apparently the main view just stays in the background while I'm changing settings? How can I redraw or update the main view after I change settings?</p>