How can I pass arguments to the previous screen with pop()? [duplicate] - flutter

Question

This question already has answers here:
Passing data between screens in Flutter
(13 answers)
Closed 10 months ago.
On the screen, the user enters a message in the field and when the button is clicked, pop() fires.
How can I pass the data from the field to the previous screen and display it? For implementation, I need to use pop()
Screen with TextField:
// text controller for message input
TextEditingController textController = TextEditingController();
#override
void dispose() {
textController.dispose();
super.dispose();
}
// go to result screen
void getResult() {
Navigator.pop(context, textController.text);
}
ElevatedButton(
onPressed: getResult, child: const Text('Display result'))
ResultScreen:
class ResultScreen extends StatefulWidget {
#override
State<ResultScreen> createState() => _ResultScreenState();
}
class _ResultScreenState extends State<ResultScreen> {
#override
Widget build(BuildContext context) {
// navigation to text_screen
void _navToTextScreen() {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => const TextScreen()),
);
}
return Scaffold(
appBar: AppBar(
title: const Text('Results'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
ElevatedButton(
onPressed: _navToTextScreen,
child: const Text('Enter data'),
),
const SizedBox(
height: 50
),
Text('User Message:'),
const SizedBox(
height: 20
),
],
)),
);
}
}

Answer 1

await the pop and the result
Future<void> _navToTextScreen() async {
final result = await Navigator.push(
context,
MaterialPageRoute(builder: (context) => const TextScreen()),
);

Answer 2

This is a working proof of concept:
import 'package:flutter/material.dart';
class FirstWidget extends StatefulWidget {
const FirstWidget({Key? key}) : super(key: key);
#override
State<FirstWidget> createState() => _FirstWidgetState();
}
class _FirstWidgetState extends State<FirstWidget> {
String text = 'Hello';
#override
Widget build(BuildContext context) {
return Column(
children: [
Text(text),
//textbutton widget that waits for value from a new page, and when it's popped and sets it to the variable 'text'.
TextButton(
child: const Text('Click me'),
onPressed: () async {
final result = await Navigator.push(
context,
MaterialPageRoute(
builder: (context) => const FooWidget(),
),
);
setState(() {
text = result;
});
},
),
],
);
}
}
class FooWidget extends StatelessWidget {
const FooWidget({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return
//text widget that passes it's value to the previous page.
Column(
children: [
const Text('Hello'),
TextButton(
child: const Text('Click me'),
onPressed: () {
Navigator.pop(context, 'Hello from FooWidget');
},
),
],
);
}
}