How do I supply an initial value to a text field?

Question

I\'d like to supply an initial value to a text field and redraw it with an empty value to clear the text. What\'s the best approach to do that with Flutter\'s APIs?

Answer 1

If you want to handle multiple TextInputs as asked by @MRT in the comment to the accepted answer, you can create a function that takes an initial value and returns a TextEditingController like this:

initialValue(val) {
  return TextEditingController(text: val);
}

Then, set this function as the controller for the TextInput and supply its initial value there like this:

controller: initialValue('Some initial value here....')

You can repeat this for the other TextInputs.

Answer 2

class _YourClassState extends State<YourClass> {
  TextEditingController _controller = TextEditingController();

  @override
  void initState() {
    super.initState();
    _controller.text = 'Your message';
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      color: Colors.white,
      child: TextFormField(
        controller: _controller,
        decoration: InputDecoration(labelText: 'Send message...'),
      ),
    );
  }
}

Answer 3

inside class,

  final usernameController = TextEditingController(text: 'bhanuka');

TextField,

   child: new TextField(
        controller: usernameController,
    ...
)

Answer 4

This can be achieved using TextEditingController.

To have an initial value you can add

TextEditingController _controller = TextEditingController(text: 'initial value');

or

If you are using TextFormField you have a initialValue property there. Which basically provides this initialValue to the controller automatically.

TextEditingController _controller = TextEditingController();
TextFormField(
  controller: _controller,
  initialValue: 'initial value'
)

To clear the text you can use _controller.clear() method.

Answer 5

TextEdittingController _controller = new TextEdittingController(text: "your Text");

or

@override
  void initState() {
    super.initState();
    _Controller.text = "Your Text";
    }

Answer 6

I've seen many ways of doing this on here. However I think this is a little more efficient or at least concise than the other answers.

TextField(
   controller: TextEditingController(text: "Initial Text here"),
)