android - Order of onPreferenceChange invocation when 2 classes implement OnPreferenceChangeListener -

i'm creating class extends preferenceactivity implements onpreferencechangelistener, , it's 1 inflating xml preference resouece.

i got service implementing onpreferencechangelistener on same default sharedpreference.

when user changes preference in preference screen, there absolute order of onpreferencechange invocation? can sure first invocation called within activity , after called service? , happens if create change listener different class?