Flutter:将项目从一个列表转移到另一个列表

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('List Transfer Example')),
        body: ListTransferWidget(),
      ),
    );
  }
}

class ListTransferWidget extends StatefulWidget {
  @override
  _ListTransferWidgetState createState() => _ListTransferWidgetState();
}

class _ListTransferWidgetState extends State<ListTransferWidget> {
  List<String> sourceList = ['Item 1', 'Item 2', 'Item 3'];
  List<String> targetList = [];

  void transferItem(int index) {
    if (index >= 0 && index < sourceList.length) {
      setState(() {
        String item = sourceList.removeAt(index);
        targetList.add(item);
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Expanded(
          child: ListView.builder(
            itemCount: sourceList.length,
            itemBuilder: (context, index) {
              return ListTile(
                title: Text(sourceList[index]),
                onTap: () => transferItem(index),
              );
            },
          ),
        ),
        Divider(),
        Expanded(
          child: ListView.builder(
            itemCount: targetList.length,
            itemBuilder: (context, index) => ListTile(title: Text(targetList[index])),
          ),
        ),
      ],
    );
  }
}