How to add clear button to TextField Widget

Question

Is there a proper way to add a clear button to the TextField?

Just like this picture from Material design guidelines:

What I found is

Answer 1

Here’s another answer expanding a bit on @Vilokan Lab’s answer, which wasn’t really doing it for me since FlatButton has a minimum width of 88.0, and thus the clear button was not appearing right-aligned with the TextField at all.

So I went ahead and made my own button class, and applied that using a Stack, here is my process:

Button class:

class CircleIconButton extends StatelessWidget {
final double size;
final Function onPressed;
final IconData icon;

CircleIconButton({this.size = 30.0, this.icon = Icons.clear, this.onPressed});

@override
Widget build(BuildContext context) {
  return InkWell(
    onTap: this.onPressed,
    child: SizedBox(
        width: size,
        height: size,
        child: Stack(
          alignment: Alignment(0.0, 0.0), // all centered
          children: [
            Container(
              width: size,
              height: size,
              decoration: BoxDecoration(
                  shape: BoxShape.circle, color: Colors.grey[300]),
            ),
            Icon(
              icon,
              size: size * 0.6, // 60% width for icon
            )
          ],
        )));
  }
}

Then apply like so as InputDecoration to your TextField:

var myTextField = TextField(
  controller: _textController,
  decoration: InputDecoration(
      hintText: "Caption",
      suffixIcon: CircleIconButton(
        onPressed: () {
          this.setState(() {
            _textController.clear();
          });
        },
      )),
  },
);

To get this:

Unhighlighted state

Highlighted / selected state.

Note this colouring comes free when you use suffixIcon.

---

Note you can also Stack it in your TextField like this, but you won't get the auto-colouring you get when you use suffixIcon:

var myTextFieldView = Stack(
  alignment: Alignment(1.0,0.0), // right & center
  children: [
    TextField(
      controller: _textController,
      decoration: InputDecoration(hintText: "Caption"),
    ),
    Positioned(
      child: CircleIconButton(
        onPressed: () {
          this.setState(() {
            _textController.clear();
          });
        },
      ),
    ),
  ],
);