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背景：我正在开发一个 Android 项目，在该项目中会引发日期预订的并发，并且我使用MaterialDatePicker来选择日期。

问题：我需要禁用一些其他用户已经选择的特定日期以处理并发。我能够从 Firestore（Firebase - 后端开发平台）中获取其他用户选择的日期，但无法处理日历。我遇到了一个建议使用setDisabledDays(calender[] days)的博客，但不太清楚该怎么做？！

需要帮助！- 我如何禁用日历上的特定日期？？？

Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
    calendar.clear();
    long today = MaterialDatePicker.todayInUtcMilliseconds();
    calendar.setTimeInMillis(today);
    calendar.set(Calendar.MONTH, Calendar.JANUARY);
    long January = calendar.getTimeInMillis();
    calendar.set(Calendar.MONTH, Calendar.DECEMBER);
    long December = calendar.getTimeInMillis();

    CalendarConstraints.Builder calenderConstraintBuilder = new CalendarConstraints.Builder();
    calenderConstraintBuilder.setOpenAt(today);
    calenderConstraintBuilder.setValidator(DateValidatorPointForward.now());
    MaterialDatePicker.Builder builder = MaterialDatePicker.Builder.datePicker();
    builder.setTitleText("Select start date");
    builder.setCalendarConstraints(calenderConstraintBuilder.build());
    MaterialDatePicker materialDatePicker = builder.build(); 

    mDatePickerBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            materialDatePicker.show(getSupportFragmentManager(), "DATE_PICKER");
        }
    });

    materialDatePicker.addOnPositiveButtonClickListener(new MaterialPickerOnPositiveButtonClickListener() {
        @Override
        public void onPositiveButtonClick(Object selection) {
            duration = materialDatePicker.getHeaderText();
            //This duration variable must be stored in database, it has both start and end date
            dateResult.setText("Selected dates: " + duration);
        }
    });
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