Flutter社交连接插件crowd_connected的使用

crowd_connected 是一个用于实现Android和iOS原生SDK的插件。请注意，这并不是官方的crowd_connected包。

开始使用

详细信息可以参考示例应用程序。更多详细信息可以前往官方文档查阅。

示例代码

以下是一个完整的示例代码，展示了如何在Flutter应用中使用crowd_connected插件。

import 'dart:io';

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:crowd_connected/crowd_connected.dart';
import 'package:permission_handler/permission_handler.dart';

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

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

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = '未知';
  final _crowdConnectedPlugin = CrowdConnected();

  [@override](/user/override)
  void initState() {
    super.initState();
    initPlatformState();
  }

  // 平台消息是异步的，因此我们在异步方法中初始化。
  Future<void> initPlatformState() async {
    String platformVersion;
    // 平台消息可能会失败，所以我们使用try/catch来捕获PlatformException。
    // 我们还处理了消息可能返回null的情况。
    try {
      platformVersion = await _crowdConnectedPlugin.getPlatformVersion() ?? '未知平台版本';
    } on PlatformException {
      platformVersion = '获取平台版本失败。';
    }

    // 如果在异步平台消息飞行时小部件从树中移除，则我们希望丢弃回复而不是调用setState来更新我们的不存在的外观。
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  void _onTapPermission() async {
    final locationWhenInUse = await Permission.locationWhenInUse.request();
    debugPrint('====> Permission.locationWhenInUse: $locationWhenInUse');

    if (Platform.isAndroid) {
      final bluetoothScan = await Permission.bluetoothScan.request();
      debugPrint('====> Permission.bluetoothScan: $bluetoothScan');
    }

    if (Platform.isIOS) {
      final bluetooth = await Permission.bluetooth.request();
      debugPrint('====> Permission.bluetooth: $bluetooth');
    }
  }

  void _startService() async {
    await _crowdConnectedPlugin.start(
      // TODO 添加你的appKey
      appKey: '',
      // TODO 添加你的publicToken
      publicToken: '',
      // TODO 添加你的secretToken
      secretToken: '',
    );
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('插件示例应用'),
        ),
        body: Column(
          children: [
            const Row(children: []),
            Text('运行于: $_platformVersion\n'),
            TextButton(
              onPressed: _onTapPermission,
              child: const Text('请求权限'),
            ),
            TextButton(
              onPressed: _startService,
              child: const Text('启动服务'),
            ),
          ],
        ),
      ),
    );
  }
}

说明

1. 导入必要的库：

   import 'dart:io';
   import 'package:flutter/material.dart';
   import 'dart:async';
   import 'package:flutter/services.dart';
   import 'package:crowd_connected/crowd_connected.dart';
   import 'package:permission_handler/permission_handler.dart';
   

2. 定义主应用类：

   void main() {
     runApp(const MyApp());
   }
   
   class MyApp extends StatefulWidget {
     const MyApp({super.key});
   
     [@override](/user/override)
     State<MyApp> createState() => _MyAppState();
   }
   

3. 初始化状态：

   class _MyAppState extends State<MyApp> {
     String _platformVersion = '未知';
     final _crowdConnectedPlugin = CrowdConnected();
   
     [@override](/user/override)
     void initState() {
       super.initState();
       initPlatformState();
     }
   

4. 获取平台版本：

   Future<void> initPlatformState() async {
     String platformVersion;
     try {
       platformVersion = await _crowdConnectedPlugin.getPlatformVersion() ?? '未知平台版本';
     } on PlatformException {
       platformVersion = '获取平台版本失败。';
     }
   
     if (!mounted) return;
   
     setState(() {
       _platformVersion = platformVersion;
     });
   }
   

5. 请求权限：

   void _onTapPermission() async {
     final locationWhenInUse = await Permission.locationWhenInUse.request();
     debugPrint('====> Permission.locationWhenInUse: $locationWhenInUse');
   
     if (Platform.isAndroid) {
       final bluetoothScan = await Permission.bluetoothScan.request();
       debugPrint('====> Permission.bluetoothScan: $bluetoothScan');
     }
   
     if (Platform.isIOS) {
       final bluetooth = await Permission.bluetooth.request();
       debugPrint('====> Permission.bluetooth: $bluetooth');
     }
   }
   

6. 启动服务：

   void _startService() async {
     await _crowdConnectedPlugin.start(
       appKey: '',
       publicToken: '',
       secretToken: '',
     );
   }
   

7. 构建UI：

   [@override](/user/override)
   Widget build(BuildContext context) {
     return MaterialApp(
       home: Scaffold(
         appBar: AppBar(
           title: const Text('插件示例应用'),
         ),
         body: Column(
           children: [
             const Row(children: []),
             Text('运行于: $_platformVersion\n'),
             TextButton(
               onPressed: _onTapPermission,
               child: const Text('请求权限'),
             ),
             TextButton(
               onPressed: _startService,
               child: const Text('启动服务'),
             ),
           ],
         ),
       ),
     );
   }