Betterpickers Datepicker Validation

XYZActivity implements CalendarDatePickerDialogFragment.OnDateSetListener, TimePickerDialogFragment.TimePickerDialogHandler

etDOB.setFocusable(false);
           etDOB.setClickable(true);
           etDOB.setLongClickable(false);
           etDOB.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View v) {
                   rlDOB.performClick();
               }
           });

rlDOB.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View v) {
                   MonthAdapter.CalendarDay maxDate = new MonthAdapter.CalendarDay(Calendar.getInstance().get(Calendar.YEAR) - 18,
                           Calendar.getInstance().get(Calendar.MONTH),
                           Calendar.getInstance().get(Calendar.DAY_OF_MONTH));

MonthAdapter.CalendarDay minDate = new MonthAdapter.CalendarDay((Calendar.getInstance().get(Calendar.YEAR) - 100),
        Calendar.getInstance().get(Calendar.MONTH),
        Calendar.getInstance().get(Calendar.DAY_OF_MONTH));

if (callDobPicker == null) {
    callDobPicker = new CalendarDatePickerDialogFragment()
            .setFirstDayOfWeek(Calendar.SUNDAY)

            .setDoneText("Select")
            .setCancelText("Cancel")
            .setDateRange(minDate, maxDate)
            .setThemeCustom(R.style.MyCustomBetterPickersDialogs1)
            .setOnDateSetListener(ProspectPersonalFragment.this);
}

                    if (callDobPicker.isVisible() == true) {
                        callDobPicker.dismiss();
                    }
                    callDobPicker.show(getChildFragmentManager(), FRAG_TAG_DATE_PICKER); // for fragment
// callDobPicker.show(getSupportFragmentManager(), FRAG_TAG_DATE_PICKER); // for activity

    }
});

@Override
  public void onDateSet(CalendarDatePickerDialogFragment dialog, int year, int monthOfYear, int dayOfMonth) {
      App.showLog(TAG, "---" + year + "---" + monthOfYear + "---" + dayOfMonth);
      strDob = dayOfMonth + "/" + (monthOfYear + 1) + "/" + year;
      etDOB.setText(strDob);
  }

rlCallDateTime.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View v) {
                   MonthAdapter.CalendarDay maxDate = new MonthAdapter.CalendarDay(Calendar.getInstance().get(Calendar.YEAR),
                           Calendar.getInstance().get(Calendar.MONTH),
                           Calendar.getInstance().get(Calendar.DAY_OF_MONTH));

MonthAdapter.CalendarDay minDate = new MonthAdapter.CalendarDay((Calendar.getInstance().get(Calendar.YEAR) - 100),
        Calendar.getInstance().get(Calendar.MONTH),
        Calendar.getInstance().get(Calendar.DAY_OF_MONTH));

if (calDatePicker == null) {
    calDatePicker = new CalendarDatePickerDialogFragment()
            .setFirstDayOfWeek(Calendar.SUNDAY)
            .setDoneText("Select")
            .setCancelText("Cancel")
            .setDateRange(minDate, maxDate)
            .setThemeCustom(R.style.MyCustomBetterPickersDialogs1)
            .setOnDateSetListener(ActNewCallTest.this);
}

if (calDatePicker.isVisible() == true) {
    calDatePicker.dismiss();
}

//111--  calDatePicker.setPreselectedDate(1991,6,21);
calDatePicker.show(getSupportFragmentManager(), FRAG_TAG_DATE_PICKER);

calDatePicker.setOnDismissListener(new OnDialogDismissListener() {
    @Override
    public void onDialogDismiss(DialogInterface dialoginterface) {

        TimePickerBuilder tpb = new TimePickerBuilder()
                .setFragmentManager(getSupportFragmentManager())
                .setStyleResId(R.style.BetterPickersDialogFragment);
        tpb.show();
    }
});

    }
});

@Override
public void onDialogTimeSet(int reference, int hourOfDay, int minute) {
    strTime = String.format("%02d", hourOfDay) + ":" + String.format("%02d", minute);

    //etCallDateTime.setText(App.get_dd_MM_yyyy_hh_mm(strDate + " " + strTime));
    etCallDateTime.setText(App.convertFormat("dd/MM/yyyy HH:mm", "dd/MM/yyyy    hh:mm a", strDate + " " + strTime));
}

public static String convertFormat(String inFormat, String opFormat, String data_time) {
    DateFormat f1 = new SimpleDateFormat(inFormat);
    Date d = null;
    try {
        d = f1.parse(data_time);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    DateFormat f2 = new SimpleDateFormat(opFormat);
    String x = f2.format(d);
    return x;
}