I have found lots of examples how to get default ringtone. Something like that:
Uri alert = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
I was struggling with this issue as well, so the solution is:
Uri defaultRingtoneUri = RingtoneManager.getActualDefaultRingtoneUri(getActivity().getApplicationContext(), RingtoneManager.TYPE_RINGTONE); Ringtone defaultRingtone = RingtoneManager.getRingtone(getActivity(), defaultRingtoneUri);