title: Flutter Keyboard makes textfield hide
body: <p>I'm new to flutter. I've added a form with a text field and when I clicked the textfield and keyboard comes, the textfield goes up.</p>
  
  <p>This is my code : </p>
  
  <pre><code>Widget build(BuildContext context) {
  
  MediaQueryData mediaQuery = MediaQuery.of(context);
  return new Scaffold(
    body:  new Container(
        color: Colors.purple,
        constraints: new BoxConstraints.expand(),
        padding: EdgeInsets.only(top: 10.0,left: 10.0,right: 10.0, bottom: mediaQuery.viewInsets.bottom, ),
        child: SingleChildScrollView(
          child: Container(
              child: Column(
                  crossAxisAlignment: CrossAxisAlignment.center,
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: &lt;Widget&gt;[
                    SizedBox(height: 12.0),
                    Text(
                      'What is your Business Name?',
                      style: TextStyle(fontSize: 24.0),
                    ),
                    AppForm(),
                  ],
                ),
              padding: EdgeInsets.only(left: 10.0,right: 10.0, bottom: mediaQuery.viewInsets.bottom),
              decoration: BoxDecoration(
                borderRadius: BorderRadius.all(Radius.circular(30.0)),
                color: Colors.white,
                  ),
                )
            )
        ),
      );
    }
  </code></pre>
  
  <p>This is the result without opening the keyboard: 
  <a href="https://i.stack.imgur.com/fVXpt.png" rel="noreferrer">Image without keyboard</a></p>
  
  <p>This is the image after opening the keyboard:
  <a href="https://i.stack.imgur.com/q4yjh.png" rel="noreferrer">Image after opening the keyboard</a></p>
  
  <hr>
  
  <p>Here is my flutter doctor output.</p>
  
  <pre><code>Doctor summary (to see all details, run flutter doctor -v): [√] Flutter 
  (Channel beta, v0.5.1, on Microsoft Windows [Version 10.0.17134.165], locale 
  en-US) [√] Android toolchain - develop for Android devices (Android SDK 
  28.0.0) [√] Android Studio (version 3.1) [!] VS Code, 64-bit edition (version 
  1.25.1) [!] Connected devices ! No devices available ! Doctor found issues in 
  2 categories.
  </code></pre>
  
  <p>any idea how to fix this?</p>