title: Flutter - How to center widget inside list view
body: <p>I'm struggling with centering a widget inside <code>listView</code>.</p>
  
  <p>I tried this, but <code>Text('ABC')</code> is not centered vertically.
  How can I achieve this?</p>
  
  <pre><code>new Scaffold(
    appBar: new AppBar(),
    body: new ListView(
      padding: const EdgeInsets.all(20.0),
      children: [
        new Center(
          child: new Text('ABC')
        )
      ]
    )
  );
  </code></pre>