Restrict Range in Android DatePicker Custom Dialog

Question

I have a custom linear layout which has DatePicker and TimePicker widgets in it. This is used as DateTime picker. I want to restrict t

Answer 1

The Material Components Library provides the MaterialDatePicker.
You can use a DateValidator to restrict the selections.
In particular you can use the built-in validators:

• DateValidatorPointForward that enables dates from a given point forward
• DateValidatorPointBackward that enables only dates before a given point.

Something like:

MaterialDatePicker.Builder> builderRange = MaterialDatePicker.Builder.dateRangePicker();
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 listValidators =
            new ArrayList();
listValidators.add(dateValidatorMin);
listValidators.add(dateValidatorMax);
CalendarConstraints.DateValidator validators = CompositeDateValidator.allOf(listValidators);
constraintsBuilderRange.setValidator(validators);

builderRange.setCalendarConstraints(constraintsBuilderRange.build());
MaterialDatePicker> pickerRange = builderRange.build();
pickerRange.show(getSupportFragmentManager(), pickerRange.toString());