Text through border in flutter

Question

I want to add the text through a container border in flutter.

I just want that Address to appear through a gap between the top border. It doesn't seem possible using a positioned widget, because then the border lines would appear through the "Address" text.

Is it at all possible?

Answer 1

Is this what you want?

class MainPage extends StatefulWidget {
  @override
  _MainPageState createState() => _MainPageState();
}

class _MainPageState extends State<MainPage> {
  FocusNode focusNode = FocusNode();
  bool isFocused = false;

  @override
  void initState() {
    focusNode.addListener(_onFocusChange);
    super.initState();
  }

  void _onFocusChange() {
    setState(() => isFocused = !isFocused);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        margin: const EdgeInsets.symmetric(horizontal: 500, vertical: 300),
        child: Stack(
          children: <Widget>[
            Container(
              padding: const EdgeInsets.only(top: 10),
              child: TextFormField(
                focusNode: focusNode,
                decoration: InputDecoration(
                  border: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(30)),
                ),
              ),
            ),
            Align(
              alignment: Alignment.topCenter,
              child: Container(
                color: Colors.white,
                child: Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 8.0),
                  child: Text(
                    'Address',
                    style:
                        isFocused ? TextStyle(color: Colors.blue[800]) : null,
                  ),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

As far as I know there is no way to centerized labelText in InputDecoration.

Answer 2

Does it have to be the container border? If not, you can use the TextField with InputDecoration like this:

TextField(
     decoration: InputDecoration(
         border: OutlineInputBorder(),
         labelText: 'Label Text',
     ),
     textAlign: TextAlign.center,
),

But Sadly the TextField dose not support the centered label text (textAlign: TextAlign.center, only centers the hint text). If you want to center the label text you have to change the TextField.dart.

This is TextField so it's not like a usual Text because it is editable. If you want it to be like a Text,set enabled: false and give a controller to it and set an initial value. Or you can use TextFormField so you don't have to use a controller. Like this:

TextFormField(
    decoration: InputDecoration(
        border: OutlineInputBorder(),
        labelText: 'Address',
    ),
    textAlign: TextAlign.center,
    enabled: true,
    initialValue: 'Address Here',
),