android developer training errors in sample code for network connection
<p>I am going through the android developer training material here - <a href="http://developer.android.com/training/basics/network-ops/index.html" rel="nofollow">http://developer.android.com/training/basics/network-ops/index.html</a>.  I downloaded the sample code NetworkUsage.zip and imported it to eclipse.  The code has error in SettingsActivity.java when I open it, "The method onSharedPreferenceChanged(SharedPreferences, String) of type SettingsActivity must override a superclass method".</p>

<p>As far as I can see it is correctly defining the method and implementing the interface,  why is there an error?  From the android api I can see that this interface still exists and has not be deprecated or anything.</p>

<p>Thanks!</p>
