title: No Material widget found
body: <p>I am new to Flutter and I was trying do execute the example <a href="https://flutter.io/text-input/" rel="noreferrer">here</a>. I just want to use the TextField widget to get some user input. The issue is that I get a "No Material widget found." error. What am I doing wrong ? Thank you.</p>
  
  <p>Code:</p>
  
  <pre><code>import 'package:flutter/material.dart';    
  
  void main() {
    runApp(new MyApp());
  }
  
  
  class MyApp extends StatelessWidget {
    // This widget is the root of your application.
    @override
    Widget build(BuildContext context) {
      return new MaterialApp(
        title: 'Flutter Demo',
        home: new ExampleWidget(),
      );
    }
  }
  
  
  /// Opens an [AlertDialog] showing what the user typed.
  class ExampleWidget extends StatefulWidget {
    ExampleWidget({Key key}) : super(key: key);
  
    @override
    _ExampleWidgetState createState() =&gt; new _ExampleWidgetState();
  }
  
  /// State for [ExampleWidget] widgets.
  class _ExampleWidgetState extends State&lt;ExampleWidget&gt; {
    final TextEditingController _controller = new TextEditingController();
  
    @override
    Widget build(BuildContext context) {
      return new Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: &lt;Widget&gt;[
          new TextField(
            controller: _controller,
            decoration: new InputDecoration(
              hintText: 'Type something',
            ),
          ),
          new RaisedButton(
            onPressed: () {
              showDialog(
                context: context,
                child: new AlertDialog(
                  title: new Text('What you typed'),
                  content: new Text(_controller.text),
                ),
              );
            },
            child: new Text('DONE'),
          ),
        ],
      );
    }
  }
  </code></pre>
  
  <p>This is the error stack:</p>
  
  <pre><code>Launching lib/main.dart on Android SDK built for x86 in debug mode...
  Built build/app/outputs/apk/app-debug.apk (21.5MB).
  I/flutter ( 5187): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
  I/flutter ( 5187): The following assertion was thrown building InputDecorator(decoration: InputDecoration(hintText:
  I/flutter ( 5187): "Type something"); baseStyle: null; isFocused: false; isEmpty: true; dirty):
  I/flutter ( 5187): No Material widget found.
  I/flutter ( 5187): InputDecorator widgets require a Material widget ancestor.
  I/flutter ( 5187): In material design, most widgets are conceptually "printed" on a sheet of material. In Flutter's
  I/flutter ( 5187): material library, that material is represented by the Material widget. It is the Material widget
  I/flutter ( 5187): that renders ink splashes, for instance. Because of this, many material library widgets require that
  I/flutter ( 5187): there be a Material widget in the tree above them.
  I/flutter ( 5187): To introduce a Material widget, you can either directly include one, or use a widget that contains
  I/flutter ( 5187): Material itself, such as a Card, Dialog, Drawer, or Scaffold.
  I/flutter ( 5187): The specific widget that could not find a Material ancestor was:
  I/flutter ( 5187):   InputDecorator(decoration: InputDecoration(hintText: "Type something"); baseStyle: null;
  I/flutter ( 5187):   isFocused: false; isEmpty: true)
  I/flutter ( 5187): The ownership chain for the affected widget is:
  I/flutter ( 5187):   InputDecorator ← AnimatedBuilder ← Listener ← _GestureSemantics ← RawGestureDetector ←
  I/flutter ( 5187):   GestureDetector ← TextField ← Column ← ExampleWidget ← _ModalScopeStatus ← ⋯
  I/flutter ( 5187): 
  I/flutter ( 5187): When the exception was thrown, this was the stack:
  I/flutter ( 5187): #0      debugCheckHasMaterial.&lt;anonymous closure&gt; (package:flutter/src/material/debug.dart:26)
  I/flutter ( 5187): #2      debugCheckHasMaterial (package:flutter/src/material/debug.dart:23)
  I/flutter ( 5187): #3      InputDecorator.build (package:flutter/src/material/input_decorator.dart:334)
  ... &lt;output omitted&gt;
  I/flutter ( 5187): (elided one frame from class _AssertionError)
  I/flutter ( 5187): ════════════════════════════════════════════════════════════════════════════════════════════════════
  I/flutter ( 5187): Another exception was thrown: No Material widget found.
  </code></pre>