Update existing Preference-item in a PreferenceActivity upon returning from a (sub)PreferenceScreen

Question

I have a PreferenceActivity with a bunch of (Sub)PreferenceScreens. Each such (Sub)PreferenceScreen represents an account and has the account-username as its title.

Answer 1

notifyDataSetChanged() is right solution. But I want to add recursive iterator for all PreferenceScreens, as far as I got a problem to find real parent of a Preference. For complicated structure of Preferences I recommend this killer-code:

private void updateAll_PrefereneScreens(PreferenceGroup group) {
    if (group instanceof PreferenceScreen) {
        BaseAdapter adapter = (BaseAdapter) ((PreferenceScreen) group).getRootAdapter();
        adapter.notifyDataSetChanged();
    }
    for (int i=0; i

I call it after every setSummary() to ensure it works properly:

findPreference("KEY").setSummary(str);
updateAll_PrefereneScreens(getPreferenceScreen());