How to disable past dates in MaterialDatePicker?

Question

 //Material Date Picker
private val calendar = Calendar.getInstance()
private val constraintsBuilder = CalendarConstraints.Builder().setStart(calendar.timeInMillis)
priv         


        

Answer 1

You need to create your own DateValidator for this. A date being enabled/disabled depends on whether DateValidator.isValid() returns true or false

@Parcelize
class FutureDateValidator : CalendarConstraints.DateValidator {
    override fun isValid(date: Long): Boolean {
        return date > System.currentTimeMillis()
    }
}

And then use this validator as:

CalendarConstraints.Builder()
    .setValidator(FutureDateValidator())
    .build()

Answer 2

You can build your own DateValidator or you can just use the DateValidatorPointForward provided by the library.

Something like:

//Returns a DateValidator which enables days from {@code point}, in 
//UTC milliseconds, forward
CalendarConstraints.DateValidator dateValidator = DateValidatorPointForward.from(yourDate);
constraintsBuilder.setValidator(dateValidator);