title: TextField in Modal
body: <p>If we use listview the textfield will just go up when the keyboard appear but in modal it won't.
  sorry I don't know how to properly explain it I will just show you with image.</p>
  <blockquote>
  <p>modal code</p>
  </blockquote>
  <pre><code>showModalBottomSheet(
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(
          top: Radius.circular(25.0),
        ),
      ),
      backgroundColor: Colors.white,
      context: context,
      builder: (context) =&gt; Wrap(
        children: [
          Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisAlignment: MainAxisAlignment.start,
            children: [
  
              // ... another widget
              // ...
              // ...
              
              // Write review text area
              Container(
                margin: EdgeInsets.fromLTRB(24, 8, 24, 0),
                padding: EdgeInsets.fromLTRB(16, 4, 16, 4),
                width: double.infinity,
                height: 100,
                decoration: BoxDecoration(
                  color: Color(0xffF7F7F7),
                  borderRadius: BorderRadius.circular(20),
                ),
                child: TextField(
                  expands: true,
                  maxLines: null,
                  decoration: InputDecoration(
                    hintText: languageCode == 'en'
                        ? 'How is your overall experience?'
                        : languageCode == 'id'
                            ? 'Bagaimana pengalaman Anda secara keseluruhan?'
                            : '',
                    hintStyle: TextStyle(
                      color: Color(0xffB2B2B2),
                    ),
                    border: InputBorder.none,
                  ),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  </code></pre>
  <blockquote>
  <p>no keyboard</p>
  </blockquote>
  <p><a href="https://i.stack.imgur.com/HMwfO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HMwfO.png" alt="enter image description here" /></a></p>
  <blockquote>
  <p>when keyboard appear</p>
  </blockquote>
  <p><a href="https://i.stack.imgur.com/kYrhT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kYrhT.png" alt="enter image description here" /></a></p>