Android preference activity does not update correctly -

i created android preference page , wanted show current option selected in summary.

so implemented onsharedpreferencechanged listener called correctly. however, there no screen change , old option shown.

public void onsharedpreferencechanged(sharedpreferences sharedpreferences, string key) {     // update     listpreference lp = (listpreference) findpreference(pref_download_web);     lp.setsummary(getstring(r.string.pref_listdownloadwebsummary)  + ": %s"); } 

is known bug?

i noticed updated summary shown when set prefs summary. set summary "dummy" first , real string. works too.

public void onsharedpreferencechanged(sharedpreferences sharedpreferences, string key) {     // update     listpreference lp = (listpreference) findpreference(pref_download_web);     lp.setsummary("dummy"); // required or not update     lp.setsummary(getstring(r.string.pref_listdownloadwebsummary)  + ": %s");  }