我们想在ListTile的结尾处添加第二个可点击的图标。这是代码。这是我们正在修改的基本购物清单屏幕，因此我们要在“删除”图标旁边添加“收藏夹”图标。我尝试将其添加为字幕，但将其放置在行的中间。我尝试添加带孩子的行，但它从屏幕上删除了购物商品。

import 'package:flutter/material.dart';
import 'package:lightbridge_mobile/models/shopping_item.dart';
import 'package:lightbridge_mobile/models/user.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'dart:async';
import 'dart:convert';
import 'package:http/http.dart' as http;


class Shopping extends StatefulWidget {
 @override
_HomePageState createState() => _HomePageState();

final User user; 
Shopping({Key key,@required this.user}) : super(key: key);
}

class _HomePageState extends State<Shopping> {
final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState> 
  ();
final TextEditingController _textEditingController =
  TextEditingController();

List<ShoppingItem> items = [
ShoppingItem('Milk'),ShoppingItem('Eggs'),ShoppingItem('Fabric Softener'),];

 void initState() {
 super.initState();

 }

 _onAddItempressed() {
_scaffoldKey.currentState.showBottomSheet<Null>((BuildContext context) {
  return  Container(
    decoration:  BoxDecoration(color: Colors.brown[200]),child:  Padding(
      padding: const EdgeInsets.fromLTRB(32.0,50.0,32.0,32.0),child:  TextField(
        controller: _textEditingController,decoration: InputDecoration(
          hintText: 'Please enter an item',),onSubmitted: _onSubmit,);
});
}

  _onSubmit(String s) {
  if (s.isnotEmpty) {
  insertShoppingItem(widget.user.userId,s);
  items.add(ShoppingItem(s));
  _textEditingController.clear();
  setState(() {});
  }
}

 _onDeleteItempressed(item) {
  items.removeAt(item);
  setState(() {});
 }

Future<void> insertShoppingItem(String userId,String item) async {

final response =
  await http.post('http://35.226.136.162/api/Shopping',headers: {"Content-Type": "application/json",'accept': 'application/json',},body: json.encode({'userid' : userId,'Item' : item}));

  if (response.statusCode == 204) {

 }

}

 @override
 Widget build(BuildContext context) {
 return  Scaffold(
  key: _scaffoldKey,appBar: AppBar(
    title: Text('Sams Shopping List'),backgroundColor: Colors.brown[300],body: Container(
     decoration: BoxDecoration(
        gradient: LinearGradient(
            colors: [Colors.brown[300],Colors.brown[300]],begin: Alignment.bottomLeft,end: Alignment.topRight
        )
    ),child: ListView.builder(
      itemCount: items.length,itemBuilder: (context,index) {
        return ListTile(
          title: Text(
            '${items[index].title}',style: TextStyle( color: Colors.white70,fontWeight: FontWeight.normal,fontSize: 20.0 ),// subtitle: GestureDetector(
                  //   child: Icon(
                   //  FontAwesomeIcons.heart,//  size: 20.0,//   color: Colors.brown[900],//),//      onTap: () {
              //_onDeleteItempressed(index);
          //  },//  ),trailing: GestureDetector(
                     child: Icon(
                     FontAwesomeIcons.trash,size: 20.0,color: Colors.brown[900],onTap: () {
              _onDeleteItempressed(index);
            },);
      },floatingactionButton: FloatingactionButton(
    backgroundColor: Colors.brown[700],onpressed: _onAddItempressed,tooltip: 'Add item',child: Icon(Icons.add),);
}

}