SharedPreferences reset: map size is not 0 after reset

Question

I am trying to remove my SharedPreferences , but it does not work: size not set to 0, as I expected.

 SharedPreferences sp = context.getSharedPreferences(name, mode); SharedPreferences.Editor e = sp.edit(); e.clear(); e.commit(); Map<String, ?> map = sp.getAll(); int size = map.size(); 

Any suggestions?

 private static String name = "ABC_PREFS"; private static int mode = Context.MODE_PRIVATE; 

Answer 1

Your code looks great while reading it. Are you sure the context variable is initialized correctly? Are other SharedPreferences variables pointing to the same file possible?

If this is not a problem, consider accepting an application with a minimal sample and pasting this code to see it still fails. It's easier to solve a problem like this with a full application than with just a piece of code.

Answer 2

SharedPreferences.Editor.clear () just removes only the values ​​of your preferences, which are not enough for you? You can delete all of your entries with SharedPreferences.Editor.remove () :

  for (String key: sp.getAll().keySet()) { e.remove(key); } e.commit(); 

Answer 3

You can write the size of the card in the general settings:

 e.clear(); e.putInt("size", map.size()); e.commit(); 

To get the size of the card call:

 int size = sp.getInt("size", 0);