SharedPreferences will not save/load in PreferenceActivity

Question

EDIT: The problem described below was due to a very peculiar device issue not caused by any coding-related problem.

I have a preferenceActi

Answer 1

It is possible to work around the issue of permissions by using sharedUserId which should be the same for any of your signed apps.

http://developer.android.com/reference/android/R.attr.html#sharedUserId