Flutter get text from widgets - flutter

Question

I am coming from java and now making my very initial steps with flutter.
In my first application I am playing around with the layouts and the buttons and I am facing difficulties getting the button actions to work, probably due to my coming from from java.
In my app I have, among others, the following widgets:
Widget _buttonOne = RaisedButton(
onPressed: () {},
child: Text('Button One', style: TextStyle(fontSize: 20)),
);
final _textContainer =
const Text('Container One', textAlign: TextAlign.center);
Container(
padding: const EdgeInsets.all(8),
child: _textContainer,
color: Colors.teal[200],
),
Now I want to print the text of the button and textchild of the container. How do I achieve that?
CupertinoButton.filled(
child: Text('Button Two'),
onPressed: () {
print(_textContainer); // how do I print the text of the text widget here?
print (_buttonOne. ....); // on java there is a getText() method .... how does this work in flutter?
),

Answer 1

You can access the text of a Text widget by using the data property:
final _textContainer =
const Text('Container One', textAlign: TextAlign.center);
#override
Widget build(BuildContext context) {
return Scaffold(body:
Center(
child: CupertinoButton.filled(
child: Text('Button Two'),
onPressed: () =>
{print(_textContainer.data)},
)
)
);
}
In a similar fashion, you could access the content of the RaisedButton child:
final _raisedButtonText = const Text('Button One', style: TextStyle(fontSize: 20));
Widget _buttonOne = RaisedButton(onPressed: () {}, child: _raisedButtonText);
final _textContainer =
const Text('Container One', textAlign: TextAlign.center);
#override
Widget build(BuildContext context) {
return Scaffold(body:
Center(
child: CupertinoButton.filled(
child: Text('Button Two'),
onPressed: () {
print(_textContainer.data);
print(_raisedButtonText.data);
}
)
)
);
}

Answer 2

You can copy paste run full code below
You can use as to do type casting then access attribute data
code snippet
CupertinoButton.filled(
child: Text('Button Two'),
onPressed: () {
print(_textContainer.data);
print(((_buttonOne as RaisedButton).child as Text).data);
}),
output
I/flutter (30756): Container One
I/flutter (30756): Button One
full code
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Widget _buttonOne = RaisedButton(
onPressed: () {},
child: Text('Button One', style: TextStyle(fontSize: 20)),
);
final _textContainer =
const Text('Container One', textAlign: TextAlign.center);
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
CupertinoButton.filled(
child: Text('Button Two'),
onPressed: () {
print(_textContainer
.data); // how do I print the text of the text widget here?
print(((_buttonOne as RaisedButton).child as Text).data);
}),
],
),
),
);
}
}