title: How to keep hamburger icon without visible appBar flutter
body: <p>I recently tried keeping a Hamburger icon for my menu slider without an AppBar or at least completely invisible. The first attempt was with a SafeArea but that emptied Scaffold. Then I tried setting the Opacity to 0.0 like shown on the code below. But it gives out the same result as SafeArea with nothing on Scaffold. Please can anyone help?                                 </p>
  
  <pre><code>    import 'package:flutter/material.dart';
  
  void main() =&gt; runApp(MyApp());
  
  class MyApp extends StatefulWidget {
    @override
    State&lt;StatefulWidget&gt; createState() =&gt; MyAppState();
  }
  
  class MyAppState extends State&lt;MyApp&gt; {
    @override
    Widget build(BuildContext context) {
      return new MaterialApp(
        theme: ThemeData(
          // Define the default Brightness and Colors
          brightness: Brightness.dark,
          primaryColor: Colors.lightBlue[800],
          accentColor: Colors.cyan[600],
        ),
        home: Scaffold(
            Opacity(
              opacity: 0.0,
              appBar: AppBar(),
            ),
            drawer: new Drawer(
              child: new ListView(),
            ),
            body: new Center(
                child: new Column(
              children: &lt;Widget&gt;[],
            ))),
      );
    }
  }
  </code></pre>