How do you refresh PreferenceActivity to show changes in the settings?

Question

Based on the following code, can you tell me how to refresh the PreferenceActivity window to show changes in the settings immediately? For example: the user taps the master

Answer 1

After fighting this for a day, I figured out this.
This is for multiple levels of preferences.

parent is the preference screen that holds the preference you are trying to update.

Since the settings screen displays as a dialog, you can get the listview from the dialog, then tell it's adapter to update child.

PreferenceScreen parent  // The screen holding the child
PreferenceScreen child   // The entry changing

child.setSummary(isEnabled?"Enabled":"Not Enabled");
ListView v = (ListView)parent.getDialog().findViewById(android.R.id.list);
BaseAdapter ba = (BaseAdapter)v.getAdapter();
ba.notifyDataSetChanged();

I found R.id.list is not available on older phones but this works

    ListAdapter adapter = parent.getRootAdapter();
    if (adapter instanceof BaseAdapter) {
        ((BaseAdapter)adapter).notifyDataSetChanged();
    }