Select DateRange UsingRangePicker.

 

/*
 * This Method is for select range from picker.
 * */
private fun selectDateRangeUsingRangePicker() {
    pageNumber = 1
    val displayFormat = SimpleDateFormat(DateUtility.DATE)
    val calendarStartDate = Calendar.getInstance()
    calendarStartDate.add(Calendar.DAY_OF_YEAR, -14)
    calendarStartDate[Calendar.HOUR_OF_DAY] = 0
    if(mDefaultStartDate != null){
        mDefaultStartDate
    } else {
        MaterialDatePicker.todayInUtcMilliseconds()
    }

    if(mDefaultEndDate != null){
        mDefaultEndDate
    } else {
        MaterialDatePicker.todayInUtcMilliseconds()
    }
    val builder: MaterialDatePicker.Builder<Pair<Long, Long>> = MaterialDatePicker.Builder.dateRangePicker().setTheme(R.style.ThemeOverlay_MaterialComponents_MaterialCalendar)
    builder.setTitleText(getString(R.string.select_date_range))
    val preselect = Pair(mDefaultStartDate, mDefaultEndDate)
    val constraintsBuilder = CalendarConstraints.Builder()
    val calendarStart = Calendar.getInstance()
    calendarStart[2000, 1] = 1
    constraintsBuilder.setStart(calendarStart.timeInMillis)
    constraintsBuilder.setEnd(MaterialDatePicker.todayInUtcMilliseconds())
    builder.setCalendarConstraints(constraintsBuilder.build())
    val validators: MutableList<CalendarConstraints.DateValidator> = ArrayList()
    validators.add(DateValidatorPointForward.from(calendarStart.timeInMillis))
    validators.add(DateValidatorPointForward.now())
    builder.setSelection(preselect)
    val picker = builder.build()
    picker.show(this.supportFragmentManager, "DateRange")
    picker.addOnPositiveButtonClickListener { selection: Any ->
        val selected = selection as Pair<Long, Long>
        dateToPlotStart = DateUtility.getStartOfDayDate(DateUtility.DATE_PATTERN_DELIVERY_MEDIUM_HISTORY, selected.first!!)
        dateToPlotEnd = DateUtility.getEndOfDayDate(DateUtility.DATE_PATTERN_DELIVERY_MEDIUM_HISTORY, selected.second!!)
        displayStartData = displayFormat.format(selected.first)
        displayEndDate = displayFormat.format(selected.second)
        mDefaultStartDate = selected.first!!
        mDefaultEndDate = selected.second!!
        if (displayStartData.equals(displayEndDate, ignoreCase = true)) {
            dateTextView.text = displayStartData
            tripStartDate = dateToPlotStart
            tripEndDate = dateToPlotEnd
            enableLoadingView(getString(R.string.please_wait_dialog))
            tripSummaryDataViewModel.handleUserAction(TripSummaryActions.TripSummaryAPI(dateToPlotStart, dateToPlotEnd, pageNumber, pageSize))
        } else {
            dateTextView.text = "$displayStartData - $displayEndDate"
            tripStartDate = dateToPlotStart
            tripEndDate = dateToPlotEnd
            enableLoadingView(getString(R.string.please_wait_dialog))
            tripSummaryDataViewModel.handleUserAction(TripSummaryActions.TripSummaryAPI(dateToPlotStart, dateToPlotEnd, pageNumber, pageSize))
        }
    }
}