main.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Date Picker',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Date Picker'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);
  final String title;
  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String date = "";
  DateTime selectedDate = DateTime.now();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
        backgroundColor: const Color.fromARGB(255, 25, 42, 97),
      ),
      backgroundColor: Colors.white,
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton.icon(
                onPressed: () {
                  selectDate(context);
                },
                icon: const Icon(Icons.calendar_month),
                style: ButtonStyle(
                  backgroundColor:
                      MaterialStateProperty.all<Color>(Colors.pink),
                  padding: MaterialStateProperty.all(
                      const EdgeInsets.fromLTRB(14, 14, 14, 14)),
                ),
                label: const Text(
                  "Choose Date",
                  style: TextStyle(
                    color: Colors.white,
                  ),
                )),
            const VerticalDivider(
              indent: 8,
              color: Colors.white,
            ),
            Text(
              "${selectedDate.day.toString().padLeft(2, '0')}/${selectedDate.month.toString().padLeft(2, '0')}/${selectedDate.year}",
              style: const TextStyle(
                fontSize: 16,
                fontWeight: FontWeight.bold,
              ),
            )
          ],
        ),
      ),
    );
  }

  selectDate(BuildContext context) async {
    final DateTime? selected = await showDatePicker(
      context: context,
      initialDate: selectedDate,
      firstDate: DateTime(2000),
      lastDate: DateTime(2074),
    );
    if (selected != null && selected != selectedDate) {
      setState(() {
        selectedDate = selected;
      });
    }
  }
}