Flutter页面调用管理插件pagecall_flutter的使用

本文将介绍如何在Flutter项目中使用pagecall_flutter插件来实现页面之间的通信和管理。请注意，该插件已被废弃，请改用官方推荐的flutter_pagecall插件。

插件pagecall_flutter使用步骤

1. 添加依赖

首先，在项目的pubspec.yaml文件中添加pagecall_flutter依赖：

dependencies:
  pagecall_flutter: ^版本号

然后运行以下命令以安装依赖：

flutter pub get

2. 创建第一个页面

创建一个名为FirstScreen的页面，用于输入房间ID、访问令牌和查询参数。

// example/lib/main.dart
import 'package:flutter/material.dart';
import 'package:pagecall_flutter/pagecall_flutter.dart';
import 'package:fluttertoast/fluttertoast.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Text Transfer',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const FirstScreen(),
    );
  }
}

class FirstScreen extends StatefulWidget {
  const FirstScreen({super.key});

  [@override](/user/override)
  State<FirstScreen> createState() => _FirstScreenState();
}

class _FirstScreenState extends State<FirstScreen> {
  TextEditingController roomIdFieldController = TextEditingController();
  TextEditingController accessTokenFieldController = TextEditingController();
  TextEditingController queryParamsFieldController = TextEditingController();

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Room Setting'),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Column(children: [
            TextField(
              controller: roomIdFieldController,
              decoration: const InputDecoration(
                contentPadding: EdgeInsets.all(8.0),
                hintText: 'Enter Room Id',
              ),
            ),
            TextField(
              controller: accessTokenFieldController,
              decoration: const InputDecoration(
                contentPadding: EdgeInsets.all(8.0),
                hintText: 'Enter Access Token',
              ),
            ),
            TextField(
              controller: queryParamsFieldController,
              decoration: const InputDecoration(
                contentPadding: EdgeInsets.all(8.0),
                hintText: 'Enter Query Params (Optional, a=1&b=2&c=3)',
              ),
            ),
          ],),
          ElevatedButton(
            child: const Text('Enter Room'),
            onPressed: () {
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => SecondScreen(
                    roomId: roomIdFieldController.text, 
                    accessToken: accessTokenFieldController.text, 
                    queryParams: queryParamsFieldController.text
                  ),
                ),
              );
            },
          ),
        ],
      ),
    );
  }
}

3. 创建第二个页面

创建一个名为SecondScreen的页面，用于展示PagecallView并处理消息传递。

class SecondScreen extends StatefulWidget {
  final String roomId;
  final String accessToken;
  final String queryParams;

  const SecondScreen({super.key, required this.roomId, this.accessToken = '', this.queryParams = ''});

  [@override](/user/override)
  State<SecondScreen> createState() => _SecondScreenState();
}

class _SecondScreenState extends State<SecondScreen> {
  final TextEditingController messageFieldController = TextEditingController();

  PagecallViewController? pagecallViewController;

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Pagecall Room'),
      ),
      body: Column(
          children: [
            TextField(
              controller: messageFieldController,
              decoration: const InputDecoration(
                contentPadding: EdgeInsets.all(8.0),
                hintText: "Submit to invoke sendMessage",
              ),
              keyboardType: TextInputType.text,
              onSubmitted: _invokeSendMessage,
            ),
            Expanded(
              child: PagecallView(
                mode: "meet",
                roomId: widget.roomId,
                accessToken: widget.accessToken,
                queryParams: widget.queryParams,
                onViewCreated: (controller) {
                  pagecallViewController = controller;
                },
                onMessage: (message) {
                  debugPrint('Received message=$message');
                  Fluttertoast.showToast(msg: 'Message from Native: $message');
                },
                onLoaded: () {
                  debugPrint('Pagecall loaded');
                  Fluttertoast.showToast(msg: 'Pagecall loaded');
                },
                onTerminated: (reason) {
                  debugPrint('Pagecall terminated: $reason');
                  Fluttertoast.showToast(msg: 'Pagecall terminated: $reason');
                },
                debuggable: true,
              ),
            ),
          ],
        ),
    );
  }

  void _invokeSendMessage(String message) {
    debugPrint('invoking with message=$message');

    pagecallViewController?.sendMessage(message);
    messageFieldController.clear();
  }
}