title: Flutter draggable ListItem - No Material Widget found
body: <p>In the absence of any cookbook examples for a drag and drop ListView, I'm trying to create my own but when trying to drag a row I get the error: No Material widget found. I've tried wrapping the ListTiles, in containers but always seem to get the same error.</p>
  
  <pre><code>import 'package:flutter/material.dart';
  
  void main() =&gt; runApp(new MyApp());
  
  class MyApp extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      final title = 'Basic List';
  
      var tile1 = new ListTile(
        leading: new Icon(Icons.photo),
        title: new Text('Row 1'),
      );
  
      var tile2 = new ListTile(
        leading: new Icon(Icons.photo),
        title: new Text('Row 2'),
      );
  
      var tile3 = new ListTile(
        leading: new Icon(Icons.photo),
        title: new Text('Row 3'),
      );
  
      return new MaterialApp(
        title: title,
        home: new Scaffold(
          appBar: new AppBar(
            title: new Text(title),
          ),
          body: new ListView(
              children: [
                new Draggable(child: tile1, feedback: tile1),
                new Draggable(child: tile2, feedback: tile2),
                new Draggable(child: tile3, feedback: tile3),
              ],
          ),
        ),
      );
    }
  }
  </code></pre>