单击超过 2 个按钮时如何加载 $number 图像

如何解决单击超过 2 个按钮时如何加载 $number 图像

enter image description here

我希望加载图片/Room1_Dog1、图片/Room1_Dog2.....图片/Room3_Dog3.
我不知道如何编写像 images/room$_Dog$ 这样的代码？

示例：当我同时按下 room1 按钮和 dog 3 按钮时，我希望它加载 images/room1_dog3

我无法加载图片我没有声誉

import 'package:Flutter/material.dart';
void main() {
  runApp(DogImage());
}

class DogImage extends StatelessWidget {
// This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Screen',theme: ThemeData(
        primarySwatch: Colors.orange,visualDensity: VisualDensity.adaptivePlatformDensity,),home: MyHomePage(title: 'Screen'),);
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key,this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List<bool> isSelected = List.generate(3,(index) => false);
  var _itemImage = [
    Image(image: Assetimage('images/dog1.jpeg'),Image(image: Assetimage('images/dog2.jpeg'),Image(image: Assetimage('images/dog3.jpg'),)];

  int index =0;


  tmpFunction() {
    Container(
      child: _itemImage[index],width: 500,);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,children: <Widget>[


            Container(
              child: _itemImage[index],Text(
              'loadimage',Container(
              child: ToggleButtons(children:[
                Text('room1'),Text('room2'),Text('room3'),],onpressed: (button1){setState(() {index=button1;

                  });},isSelected: isSelected),Row(
              mainAxisAlignment: MainAxisAlignment.center,children: [
                ToggleButtons(children:[
                  Text('dog1'),Text('dog2'),Text('dog3'),onpressed: (button2){setState(() {index= button2;

                    });},);
  }
}