title: PreferenceActivity with two SharedPreferences
body: <p>How to create a preference screen which can save values in two different shared preferences ?</p>
  
  <p>For example, in my PreferenceActivity my first preference is a CheckBoxPreference. The state of the checkbox is saved in "user_86_Prefs" sharedPreferences and the second preference is a ListPreference, and the state of the selected item is saved in "devicePrefs" sharedPreference.</p>
  
  <p>in my PreferenceFragment I can only do </p>
  
  <pre><code>getPreferenceManager().setSharedPreferencesName("user_86_Prefs");
  </code></pre>
  
  <p>Actually the sharedPreference named "user_86_Prefs" is specific to the user connected on the app, and the "devicePrefs" is specific to the device.</p>
  
  <p>Should I create another class which extends PreferenceFragment, and put the preferences specific to the device inside ? If yes, how can I have my two preferencesFragments in the same Activity ?</p>
  
  <p>Thanks</p>