Nested preferences.xml

Question

Is it somehow possible to include one preferences.xml into another, like it can be done for layouts with the tag?

Let\'s

Answer 1

To truly achieve the nesting effect you can use this technique to relocate the loaded preferences to a group already loaded.

PreferenceCategory notifications = (PreferenceCategory) getPreferenceScreen ().findPreference (PreferenceKey.pref_notifications.name ());
addPreferencesFromResource (R.xml.pref_notifications, notifications);

Where the enhanced addPreferencesFromResource is defined as:

private void addPreferencesFromResource (int id, PreferenceGroup newParent) {
    PreferenceScreen screen = getPreferenceScreen ();
    int last = screen.getPreferenceCount ();
    addPreferencesFromResource (id);
    while (screen.getPreferenceCount () > last) {
        Preference p = screen.getPreference (last);
        screen.removePreference (p); // decreases the preference count
        newParent.addPreference (p);
    }
}

It works for any PreferenceGroup such as PreferenceScreen and PreferenceCategory.