clear data from shared pref in android app

As i am new to android development.

After user clicks on sign out button from my app i want to delete all the info which i have stored in shared pref.

i used this editor.clear() but it won't work,

I want to delete that XML file which i开发者_StackOverflow社区s created by shared pref after user clicks on log out button i want to delete that file at run time?

thnx for any help....

You need to commit your changes:

editor.clear();
editor.commit();

Hoper this help

Try editor.clear(); followed by a editor.commit();

Edit:

Here is one example that I've used:

Preference clearPref = (Preference) findPreference("clearAll");
    clearPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {

    public boolean onPreferenceClick(Preference preference) {
        SharedPreferences settings =  PreferenceManager.getDefaultSharedPreferences(getBaseContext());                          
        SharedPreferences.Editor editor = settings.edit();
        editor.clear();
        editor.commit();                
        Toast.makeText(getBaseContext(), "All data cleared!", Toast.LENGTH_SHORT).show();

        return true;
    }

});