Flutter智能回复插件learning_smart_reply的使用

Flutter智能回复插件learning_smart_reply的使用

ML Smart Reply 是一个在Flutter中使用 ML Kit 生成智能回复的简便方法。通过 ML Kit 的智能回复功能，您可以自动生成与消息相关的回复，帮助用户快速响应消息，并使在输入能力有限的设备上更容易回复消息。

开始使用

1. 将依赖项添加到您的 Flutter 项目：

   $ flutter pub add learning_smart_reply
   

   或者在 pubspec.yaml 文件中添加：

   dependencies:
     learning_smart_reply: ^0.0.2
   

   然后运行 flutter pub get。

使用方法

首先导入包：

import 'package:learning_smart_reply/learning_smart_reply.dart';

生成智能回复

我们可以通过将聊天消息历史记录提供给 SmartReplyGenerator 来生成智能回复。

// 导入必要的包
import 'package:learning_smart_reply/learning_smart_reply.dart';
import 'package:uuid/uuid.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.lightBlue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
        primaryTextTheme: TextTheme(headline6: TextStyle(color: Colors.white)),
      ),
      home: SmartReplyPage(),
    );
  }
}

class SmartReplyPage extends StatefulWidget {
  [@override](/user/override)
  _SmartReplyPageState createState() => _SmartReplyPageState();
}

class _SmartReplyPageState extends State<SmartReplyPage> {
  SmartReplyGenerator _smartReply = SmartReplyGenerator();

  [@override](/user/override)
  void initState() {
    super.initState();
    WidgetsBinding.instance?.addPostFrameCallback((_) async {
      await testSmartReply();
    });
  }

  [@override](/user/override)
  void dispose() {
    // 释放资源
    _smartReply.dispose();
    super.dispose();
  }

  Future<void> testSmartReply() async {
    print('testSmartReply...');
    Uuid uuid = Uuid();
    String userId = uuid.v4(); // 生成唯一的用户ID
    int now = DateTime.now().millisecondsSinceEpoch;

    // 创建消息历史记录
    List<Message> history = [
      Message('Hi', user: userId, timestamp: now - (60 * 60 * 1000)), // 一小时前的消息
      Message('How are you?', timestamp: now - (20 * 60 * 1000)), // 20分钟前的消息
      Message('I am fine. Thanks.', user: userId, timestamp: now - (10 * 60 * 1000)), // 10分钟前的消息
    ];

    var result = await _smartReply.generateReplies(history); // 生成智能回复
    print('testSmartReply Result:');
    print(result);
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.lightBlue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
        primaryTextTheme: TextTheme(headline6: TextStyle(color: Colors.white)),
      ),
      home: Scaffold(
        appBar: AppBar(
          centerTitle: true,
          title: Text('Smart Reply'),
        ),
        body: Container(),
      ),
    );
  }
}

资源释放

记得在不再需要时释放资源：

smartReply.dispose();

示例项目

您可以在示例项目中学习更多内容。

完整示例代码如下：

import 'package:flutter/material.dart';
import 'package:learning_smart_reply/learning_smart_reply.dart';
import 'package:uuid/uuid.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.lightBlue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
        primaryTextTheme: TextTheme(headline6: TextStyle(color: Colors.white)),
      ),
      home: SmartReplyPage(),
    );
  }
}

class SmartReplyPage extends StatefulWidget {
  [@override](/user/override)
  _SmartReplyPageState createState() => _SmartReplyPageState();
}

class _SmartReplyPageState extends State<SmartReplyPage> {
  SmartReplyGenerator _smartReply = SmartReplyGenerator();

  [@override](/user/override)
  void initState() {
    super.initState();
    WidgetsBinding.instance?.addPostFrameCallback((_) async {
      await testSmartReply();
    });
  }

  [@override](/user/override)
  void dispose() {
    _smartReply.dispose();
    super.dispose();
  }

  Future<void> testSmartReply() async {
    print('testSmartReply...');
    Uuid uuid = Uuid();
    String userId = uuid.v4();
    int now = DateTime.now().millisecondsSinceEpoch;

    List<Message> history = [
      Message('Hi', user: userId, timestamp: now - (60 * 60 * 1000)),
      Message('How are you?', timestamp: now - (20 * 60 * 1000)),
      Message('I am fine. Thanks.', user: userId, timestamp: now - (10 * 60 * 1000)),
    ];

    var result = await _smartReply.generateReplies(history);
    print('testSmartReply Result:');
    print(result);
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.lightBlue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
        primaryTextTheme: TextTheme(headline6: TextStyle(color: Colors.white)),
      ),
      home: Scaffold(
        appBar: AppBar(
          centerTitle: true,
          title: Text('Smart Reply'),
        ),
        body: Container(),
      ),
    );
  }
}