How to Disable Past Dates in Custom Calendar View Android

Last year, I have published the CustomCalendarView Open Source Android library. This library makes it easy to add a Calendar to your Android application.

Since then many people are asking questions like how to use Decorators and how to disable some dates in CustomCalendarView. This post answers that.

In this example, we will disable all the dates that are past.

public class CalendarDayDecoratorActivity extends AppCompatActivity {
    private CustomCalendarView calendarView;
    private TextView selectedDateTv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_calendar_decorator);
        selectedDateTv = (TextView) findViewById(R.id.selected_date);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);

        //Initialize CustomCalendarView from layout
        calendarView = (CustomCalendarView) findViewById(R.id.calendar_view);

        //Initialize calendar with date
        Calendar currentCalendar = Calendar.getInstance(Locale.getDefault());

        //Show monday as first date of week
        calendarView.setFirstDayOfWeek(Calendar.MONDAY);

        //Show/hide overflow days of a month
        calendarView.setShowOverflowDate(false);

        //call refreshCalendar to update calendar the view
        calendarView.refreshCalendar(currentCalendar);

        //Handling custom calendar events
        calendarView.setCalendarListener(new CalendarListener() {
            @Override
            public void onDateSelected(Date date) {
                if (!CalendarUtils.isPastDay(date)) {
                    SimpleDateFormat df = new SimpleDateFormat("dd-MM-yyyy");
                    selectedDateTv.setText("Selected date is " + df.format(date));
                } else {
                    selectedDateTv.setText("Selected date is disabled!");
                }
            }

            @Override
            public void onMonthChanged(Date date) {
                SimpleDateFormat df = new SimpleDateFormat("MM-yyyy");
                Toast.makeText(CalendarDayDecoratorActivity.this, df.format(date), Toast.LENGTH_SHORT).show();
            }
        });


        //adding calendar day decorators
        List<DayDecorator> decorators = new ArrayList<>();
        decorators.add(new DisabledColorDecorator());
        calendarView.setDecorators(decorators);
        calendarView.refreshCalendar(currentCalendar);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // handle arrow click here
        if (item.getItemId() == android.R.id.home) {
            finish(); // close this activity and return to preview activity (if there is any)
        }
        return super.onOptionsItemSelected(item);
    }

    private class DisabledColorDecorator implements DayDecorator {
        @Override
        public void decorate(DayView dayView) {
            if (CalendarUtils.isPastDay(dayView.getDate())) {
                int color = Color.parseColor("#a9afb9");
                dayView.setBackgroundColor(color);
            }
        }
    }

}