Flutter投屏功能插件yxc_cast的使用

yxc_cast 是一个用于在 Flutter 中实现投屏功能的插件。它支持将设备屏幕内容投射到其他设备上，如电视、投影仪等。以下是如何使用 yxc_cast 插件的基本步骤：

1. 添加依赖

首先，在 pubspec.yaml 文件中添加 yxc_cast 插件的依赖：

dependencies:
  flutter:
    sdk: flutter
  yxc_cast: ^1.0.0  # 请使用最新版本

然后运行 flutter pub get 来获取依赖。

2. 初始化插件

在你的 Dart 文件中导入 yxc_cast 插件，并初始化它：

import 'package:yxc_cast/yxc_cast.dart';

void main() {
  YxcCast.initialize();
  runApp(MyApp());
}

3. 搜索设备

使用 YxcCast 提供的 API 来搜索可用的投屏设备：

void searchDevices() async {
  List<CastDevice> devices = await YxcCast.searchDevices();
  for (var device in devices) {
    print('Device Name: ${device.name}, IP: ${device.ip}');
  }
}

4. 连接到设备

选择一个设备并连接到它：

void connectToDevice(CastDevice device) async {
  bool isConnected = await YxcCast.connect(device);
  if (isConnected) {
    print('Connected to ${device.name}');
  } else {
    print('Failed to connect to ${device.name}');
  }
}

5. 开始投屏

连接成功后，你可以开始投屏：

void startCasting() async {
  bool isCasting = await YxcCast.startCasting();
  if (isCasting) {
    print('Casting started');
  } else {
    print('Failed to start casting');
  }
}

6. 停止投屏

当你想要停止投屏时，可以调用以下方法：

void stopCasting() async {
  bool isStopped = await YxcCast.stopCasting();
  if (isStopped) {
    print('Casting stopped');
  } else {
    print('Failed to stop casting');
  }
}

7. 断开连接

最后，当你不再需要连接时，可以断开与设备的连接：

void disconnectDevice() async {
  bool isDisconnected = await YxcCast.disconnect();
  if (isDisconnected) {
    print('Disconnected from device');
  } else {
    print('Failed to disconnect');
  }
}

8. 处理回调

yxc_cast 插件还提供了一些回调函数，用于处理连接状态、投屏状态等变化：

YxcCast.onConnectionChanged((bool isConnected) {
  print('Connection status: $isConnected');
});

YxcCast.onCastingStateChanged((bool isCasting) {
  print('Casting status: $isCasting');
});

9. 完整示例

以下是一个完整的示例，展示了如何使用 yxc_cast 插件进行投屏：

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

void main() {
  YxcCast.initialize();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: CastScreen(),
    );
  }
}

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

class _CastScreenState extends State<CastScreen> {
  List<CastDevice> devices = [];

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

  void searchDevices() async {
    List<CastDevice> foundDevices = await YxcCast.searchDevices();
    setState(() {
      devices = foundDevices;
    });
  }

  void connectToDevice(CastDevice device) async {
    bool isConnected = await YxcCast.connect(device);
    if (isConnected) {
      print('Connected to ${device.name}');
    } else {
      print('Failed to connect to ${device.name}');
    }
  }

  void startCasting() async {
    bool isCasting = await YxcCast.startCasting();
    if (isCasting) {
      print('Casting started');
    } else {
      print('Failed to start casting');
    }
  }

  void stopCasting() async {
    bool isStopped = await YxcCast.stopCasting();
    if (isStopped) {
      print('Casting stopped');
    } else {
      print('Failed to stop casting');
    }
  }

  void disconnectDevice() async {
    bool isDisconnected = await YxcCast.disconnect();
    if (isDisconnected) {
      print('Disconnected from device');
    } else {
      print('Failed to disconnect');
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('YXC Cast Example'),
      ),
      body: ListView.builder(
        itemCount: devices.length,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text(devices[index].name),
            subtitle: Text(devices[index].ip),
            onTap: () {
              connectToDevice(devices[index]);
            },
          );
        },
      ),
      floatingActionButton: Column(
        mainAxisAlignment: MainAxisAlignment.end,
        children: [
          FloatingActionButton(
            onPressed: startCasting,
            child: Icon(Icons.cast),
          ),
          SizedBox(height: 10),
          FloatingActionButton(
            onPressed: stopCasting,
            child: Icon(Icons.cast_connected),
          ),
          SizedBox(height: 10),
          FloatingActionButton(
            onPressed: disconnectDevice,
            child: Icon(Icons.cast_disabled),
          ),
        ],
      ),
    );
  }
}