<http://schema.org/description>
"This will demonstrate how to listen for changes to the user preferences in your app, so \u00A0that you can perform tasks depending on what the user selected/changed on the preferences screen. I have an app, with a listfragment displaying..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://envyandroid.com/android-detect-preference-changes/>