title: How can i make text field with border radius in flutter ???
body: <p>I want to add border radius to this text field in flutter. 
  My code is </p>
  
  <pre><code> new Container(
              padding: const EdgeInsets.only(bottom: 10.0, top: 20.0),
              child: new Opacity(
                  opacity: 0.7,
                  child: new TextField(
                    style: new TextStyle(
                        fontSize: 18.0,
                        height: 1.1,
                        color: Colors.white,
                        fontFamily: 'Akrobat-Bold'),
                    decoration: InputDecoration(
                        filled: true,
                        fillColor: const Color(0xFF808285),
                        hintStyle: TextStyle(
                            color: Colors.white, fontFamily: 'Akrobat-Bold'),
                        border: InputBorder.none,
                        hintText: 'User ID'),
                  )),
            ),
  </code></pre>
  
  <p>Thanks in advance.</p>