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

I'm just putting

((BaseAdapter)getPreferenceScreen().getRootAdapter()).notifyDataSetChanged();

right after updating the summary of my parent preference item.