syncfusion_flutter_datepicker 27.2.3

The Flutter Date Range Picker widget allows users to easily select dates or a range of dates. It has four built-in views that allow quick navigation to the desired date.

example/lib/main.dart

import 'package:flutter/material.dart';
// ignore: depend_on_referenced_packages
import 'package:intl/intl.dart';
import 'package:syncfusion_flutter_datepicker/datepicker.dart';

void main() {
  return runApp(const MyApp());
}

/// My app class to display the date range picker
class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  MyAppState createState() => MyAppState();
}

/// State for MyApp
class MyAppState extends State<MyApp> {
  String _selectedDate = '';
  String _dateCount = '';
  String _range = '';
  String _rangeCount = '';

  /// The method for [DateRangePickerSelectionChanged] callback, which will be
  /// called whenever a selection changed on the date picker widget.
  void _onSelectionChanged(DateRangePickerSelectionChangedArgs args) {
    /// The argument value will return the changed date as [DateTime] when the
    /// widget [SfDateRangeSelectionMode] set as single.
    ///
    /// The argument value will return the changed dates as [List<DateTime>]
    /// when the widget [SfDateRangeSelectionMode] set as multiple.
    ///
    /// The argument value will return the changed range as [PickerDateRange]
    /// when the widget [SfDateRangeSelectionMode] set as range.
    ///
    /// The argument value will return the changed ranges as
    /// [List<PickerDateRange] when the widget [SfDateRangeSelectionMode] set as
    /// multi range.
    setState(() {
      if (args.value is PickerDateRange) {
        _range = '${DateFormat('dd/MM/yyyy').format(args.value.startDate)} -'
            // ignore: lines_longer_than_80_chars
            ' ${DateFormat('dd/MM/yyyy').format(args.value.endDate ?? args.value.startDate)}';
      } else if (args.value is DateTime) {
        _selectedDate = args.value.toString();
      } else if (args.value is List<DateTime>) {
        _dateCount = args.value.length.toString();
      } else {
        _rangeCount = args.value.length.toString();
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
            appBar: AppBar(
              title: const Text('DatePicker demo'),
            ),
            body: Stack(
              children: <Widget>[
                Positioned(
                  left: 0,
                  right: 0,
                  top: 0,
                  height: 80,
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    mainAxisSize: MainAxisSize.min,
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: <Widget>[
                      Text('Selected date: $_selectedDate'),
                      Text('Selected date count: $_dateCount'),
                      Text('Selected range: $_range'),
                      Text('Selected ranges count: $_rangeCount')
                    ],
                  ),
                ),
                Positioned(
                  left: 0,
                  top: 80,
                  right: 0,
                  bottom: 0,
                  child: SfDateRangePicker(
                    onSelectionChanged: _onSelectionChanged,
                    selectionMode: DateRangePickerSelectionMode.range,
                    initialSelectedRange: PickerDateRange(
                        DateTime.now().subtract(const Duration(days: 4)),
                        DateTime.now().add(const Duration(days: 3))),
                  ),
                )
              ],
            )));
  }
}