如何向 MaterialDatePicker 添加约束以强制用户仅选择 2 个日期之间的日期?
val constraintBuilder = CalendarConstraints.Builder()
val materialRangeBuilder = MaterialDatePicker.Builder.datePicker()
materialRangeBuilder.setTitleText("Book Date")
materialRangeBuilder.setCalendarConstraints(constraintBuilder.build())
val materialRangePicker = materialRangeBuilder.build()
materialRangePicker.addOnPositiveButtonClickListener {
Timber.d("$it")
}
materialRangePicker.show(supportFragmentManager, "DATE_RANGE_PICKER")
您可以使用DateValidator
来限制选择。
特别是,您可以使用内置验证器:
-
DateValidatorPointForward
允许从给定点向前进行日期
-
DateValidatorPointBackward
仅启用给定点之前的日期。
就像是:
MaterialDatePicker.Builder<Long> builder = MaterialDatePicker.Builder.datePicker();
CalendarConstraints.Builder constraintsBuilderRange = new CalendarConstraints.Builder();
//....define min and max for example with LocalDateTime and ZonedDateTime or Calendar
CalendarConstraints.DateValidator dateValidatorMin = DateValidatorPointForward.from(min.getTimeInMillis());
CalendarConstraints.DateValidator dateValidatorMax = DateValidatorPointBackward.before(max.getTimeInMillis());
ArrayList<CalendarConstraints.DateValidator> listValidators =
new ArrayList<CalendarConstraints.DateValidator>();
listValidators.add(dateValidatorMin);
listValidators.add(dateValidatorMax);
CalendarConstraints.DateValidator validators = CompositeDateValidator.allOf(listValidators);
constraintsBuilderRange.setValidator(validators);
builder.setCalendarConstraints(constraintsBuilderRange.build());
MaterialDatePicker<Long> picker = builder.build();
picker.show(getSupportFragmentManager(), picker.toString());
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