Question

from what I can incur out of the SharedPreferences documentation, I can update a preference, add one or clear all preference values in a shared preference file.

But I want to completely clear everything inside a shared preference file, not just the values, but the preferences they refer to as well.

Answer 1

If you have a SharedPreferences.Editor object and you call clear(), does this not get you what you want? It will remove all preferences and if you call sharedPref.getAll() it should give you a map of size 0 [I just tested this].

To remove one specific preference, call editor.remove(pref), where pref is the preference name.

PS: Don’t forget to commit your changes by calling commit() or apply() method on the editor. apply() is faster as it is asynchronous. commit() is synchronous but returns a boolean indicating if the commit succeeded.