Hello World

helloworld.dart

import 'package:flutter/material.dart';

void main() => runApp(VsjApp());

class VsjApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: VsjDrawer());
  }
}

class VsjDrawer extends StatefulWidget {
  @override
  _VsjAppState createState() {
    return _VsjAppState<VsjDrawer>();
  }
}

class _VsjAppState<VsjDrawer> extends State {
  static const appTitle = 'Vsj Drawer';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.teal,
        title: const Text(appTitle),
        centerTitle: true,
      ),
      body: const Center(
        child: Text('Vsj Drawer App'),
      ),
      drawer: Drawer(
        // Add a ListView to the drawer. This ensures the user can scroll
        // through the options in the drawer if there isn't enough vertical
        // space to fit everything.
        child: ListView(
          // Important: Remove any padding from the ListView.
          padding: EdgeInsets.zero,
          children: DrawerSupplier.getDrawer(context),
        ),
      ),
    );
  }
}

class DrawerSupplier {
  static List<Widget> getDrawer(BuildContext context) {
    return [
      DrawerHeader(
        decoration: const BoxDecoration(
          color: Colors.teal,
        ),
        child: Image.network(
            'https://3.bp.blogspot.com/-py5FbTZgvjo/YDi1bsQq16I/AAAAAAAACB0/BxejbJBcHA4AVfkB33WYC3YlVmxElM7BwCK4BGAYYCw/s1600/Varanasi%2BSoftware%2BJunction%2BPhone%2BLogo.png'),
      ),
      ListTile(
        title: const Text('Item 1'),
        onTap: () {
          // Update the state of the app
          // ...
          // Then close the drawer
          Navigator.pop(context);
        },
      ),
      ListTile(
        title: const Text('Item 2'),
        onTap: () {
          print("Hello");
          Navigator.pop(context);
        },
      ),
    ];
  }
}