how to change an image when I click a toggle button(flutter) - flutter

Question

enter image description here
I cannot embed image because I don't have 10 reputation.
I want to load image when I click toggle buttons. it seems simple for you but it is hard for me to do it. I am a beginner .
I don't know how to write onPressed button. I already wrote onPressed buttons for toggle button. it seems like it is not possible to write one more oppressed code. I already used the onpressedbutton code to use ToggleButton, but I need one more function to load image but I don't know how to do it
enter code here
import 'package:flutter/material.dart';
import '123.dart';
import '456.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: Text('imageToggle'),),
body: Column(
children: [
Expanded(child: Image.asset('images/meow.jpg')),
Button123(
),
Button456(),
],
),
),
);
}
}
class Button456 extends StatefulWidget {
#override
_Button456State createState() => _Button456State();
}
class _Button456State extends State<Button456> {
List<bool> isSelected = List.generate(3, (index) => false);
#override
Widget build(BuildContext context) {
return Container(
child: ToggleButtons(
isSelected: isSelected,
color: Colors.black,
fillColor: Colors.grey,
children: [
Padding(padding: const EdgeInsets.symmetric(horizontal: 12),
child: Text('cat1'),),
Padding(padding: const EdgeInsets.symmetric(horizontal: 12),
child: Text('cat2'),),
Padding(padding: const EdgeInsets.symmetric(horizontal: 12),
child: Text('cat3'),),
],
onPressed: (int newIndexx) {
setState(() {
for (int index = 0; index < isSelected.length; index++) {
if (index == newIndexx) {
isSelected[index] = true;
} else {
isSelected[index] = false;
}
}
});
},
)
);
}
}

Answer 1

You can make the image url a variable.
String imageLink = 'myImage.png';
class _MyAppState extends State<MyApp> {
onButtonPressed(String value) {
setState(() {imageLink = value});
}
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: Text('imageToggle'),),
body: Column(
children: [
Expanded(child: Image.asset(imageLink)),
TextButton(child: Text('Click Me!'), onPressed: onButtonPressed('newImageLink')),
],
),
),
);
}
}