Flutter: How to open Drawer programmatically

Question

I want to open Drawer programmatically not by sliding it, how to disable that sliding functionality (touch functionality of Drawer)

Answer 1

Here is another example of opening the drawer programmatically from a hamburger icon and without the Appbar:-

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  @override
  State createState() => MyAppState();
}

class MyAppState extends State {
  var scaffoldKey = GlobalKey();

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        key: scaffoldKey,
        drawer: new Drawer(
          child: new ListView(
            padding: EdgeInsets.zero,
            children: [
              DrawerHeader(
                child: Text('Drawer Header'),
                decoration: BoxDecoration(
                  color: Colors.blue,
                ),
              ),
              ListTile(
                title: Text('Item 1'),
                onTap: () {
                  //Do some stuff here
                  //Closing programmatically - very less practical use
                  scaffoldKey.currentState.openEndDrawer();
                },
              )
            ],
          ),
        ),
        body: Stack(
          children: [
            new Center(
                child: new Column(
              children: [],
            )),
            Positioned(
              left: 10,
              top: 20,
              child: IconButton(
                icon: Icon(Icons.menu),
                onPressed: () => scaffoldKey.currentState.openDrawer(),
              ),
            ),
          ],
        ),
      ),
    );
  }
}