我试着像这样做一个下拉菜单：

我在stackoverflow中发现这个例子在下拉列表中添加图像但是目前它是一个列表而我不知道如何添加不同的图像

import 'package:flutter/material.dart';

class Test extends StatefulWidget {
  @override
  _TestState createState() => new _TestState();
}

class _TestState extends State<Test> {
  var _img = new

Image.network（“https://upload.wikimedia.org/wikipedia/commons/thumb/8/89/TUCPamplona10.svg/500px-TUCPamplona10.svg.png”）;

@override
      Widget build(BuildContext context) {
        return new Scaffold(
      appBar: new AppBar(title: new Text("Test Drop"),),
      body: new Center(
     child: new Container (
        height: 50.0,
        child:new DropdownButton(
        items: new List.generate(10, (int index){
      return new DropdownMenuItem(child: new Container(
        padding: const EdgeInsets.only(bottom: 5.0),
        height: 100.0,
          child: new Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: <Widget>[
            _img,
            new Text("Under 10")
          ],
        ),
      ));
    }) 
    , onChanged: null),),
   ),
  );
 }
 }
flutter dropdown