title: FlatButton dont have any pressing effect / animation
body: <p>Im new to Flutter and the buttons in the following code is not showing any button press effect when I press the buttons. I tried both in simulator as well as on android device too.</p>
  <p>Here is the code:</p>
  <pre><code>import 'package:flutter/material.dart';
  
  void main() {
    runApp(MyApp());
  }
  
  class MyApp extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      return MaterialApp(
          home: Scaffold(
        backgroundColor: Colors.blue,
        body: SafeArea(
            child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: &lt;Widget&gt;[
            Container(
              width: 50,
              height: 50,
              child: FlatButton(
                onPressed: null,
                padding: EdgeInsets.all(0.0),
                child: Text('First Button'),
              ),
            ),
            FlatButton(
              onPressed: null,
              padding: EdgeInsets.all(0.0),
              child: Text('Click Me'),
            ),
            Container(
              width: 50,
              height: 50,
              color: Colors.deepPurple,
            ),
            Container(
              width: 50,
              height: 50,
              color: Colors.white,
            ),
          ],
        )),
      ));
    }
  }
  </code></pre>