code: public static DatePickerDialog newInstance(OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth) {
          DatePickerDialog ret = new DatePickerDialog();
          ret.initialize(callBack, year, monthOfYear, dayOfMonth);
          return ret;
      }
docs: Create a new DatePickerDialog instance with a specific initial selection.
  @param callBack    How the parent is notified that the date is set.
  @param year        The initial year of the dialog.
  @param monthOfYear The initial month of the dialog.
  @param dayOfMonth  The initial day of the dialog.
  @return a new DatePickerDialog instance.