[Android Studio] สอบถามหน่อยครับเกี่ยวกับการ onClick ที่ CalendarView

 CalendarView calendar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_calendar);

        calendar = (CalendarView) findViewById(R.id._calendar);

        calendar.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
            @Override
            public void onSelectedDayChange(CalendarView view, int year, int month,
                                            int dayOfMonth) {
                Toast.makeText(getApplicationContext(), ""+dayOfMonth+" - "+(month + 1)+" - "+ year, 0).show();// TODO Auto-generated method stub

              
            }
        });
    }

}