模板版本：v0.4.0

react-native-udp

本项目基于 react-native-udp 开发。

该第三方库的仓库已迁移至 Gitcode，且支持直接从 npm 下载，新的包名为：@react-native-ohos/react-native-udp 版本所属关系如下：

1. 安装与使用

进入到工程目录并输入以下命令：

npm

npm install @react-native-ohos/react-native-udp

yarn

yarn add @react-native-ohos/react-native-udp

下面的代码展示了这个库的基本使用场景：

import React, {Component} from 'react';
import {ScrollView, StyleSheet, Text, View} from 'react-native';

import dgram from 'react-native-udp';

function randomPort() {
  return (Math.random() * 60536) | (0 + 5000); // 60536-65536
}

function toByteArray(obj) {
  var uint = new Uint8Array(obj.length);
  for (var i = 0, l = obj.length; i < l; i++) {
    uint[i] = obj.charCodeAt(i);
  }

  return new Uint8Array(uint);
}

class App extends Component {
  constructor(props) {
    super(props);

    this.updateChatter = this.updateChatter.bind(this);
    this.state = {chatter: []};
  }

  updateChatter(msg) {
    this.setState({
      chatter: this.state.chatter.concat([msg]),
    });
  }

  componentDidMount() {
    let self = this;

    let a = dgram.createSocket('udp4');
    let aPort = randomPort();
    a.bind(aPort, function(err) {
      if (err) throw err;
      self.updateChatter('a bound to ' + JSON.stringify(a.address()));
    });

    let b = dgram.createSocket('udp4');
    var bPort = randomPort();
    b.bind(bPort, function(err) {
      if (err) throw err;
      self.updateChatter('b bound to ' + JSON.stringify(b.address()));
    });

    a.on('message', function(data, rinfo) {
      var str = String.fromCharCode.apply(null, new Uint8Array(data));
      self.updateChatter(
        'a received echo ' + str + ' ' + JSON.stringify(rinfo),
      );
      a.close();
      b.close();
    });

    b.on('message', function(data, rinfo) {
      var str = String.fromCharCode.apply(null, new Uint8Array(data));
      self.updateChatter('b received ' + str + ' ' + JSON.stringify(rinfo));

      // echo back
      b.send(data, 0, data.length, aPort, '127.0.0.1', function(err) {
        if (err) throw err;
        self.updateChatter('b echoed data');
      });
    });

    b.once('listening', function() {
      var msg = toByteArray('hello');
      a.send(msg, 0, msg.length, bPort, '127.0.0.1', function(err) {
        if (err) throw err;
        self.updateChatter('a sent data');
      });
    });
  }

  render() {
    return (
      <View style={styles.container}>
        <ScrollView>
          {this.state.chatter.map((msg, index) => {
            return (
              <Text key={index} style={styles.welcome}>
                {msg}
              </Text>
            );
          })}
        </ScrollView>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    margin: 10,
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
});

export default App;

2. Link

使用AutoLink的工程需要根据该文档配置，Autolink框架指导文档：https://gitcode.com/openharmony-sig/ohos_react_native/blob/master/docs/zh-cn/Autolinking.md

如您使用的版本支持 Autolink，并且工程已接入 Autolink，可跳过ManualLink配置。

{
  "overrides": {
    "@rnoh/react-native-openharmony": "^0.72.38" // ohpm 在线版本
    // "@rnoh/react-native-openharmony" : "./react_native_openharmony.har" // 指向本地 har 包的路径
    // "@rnoh/react-native-openharmony" : "./react_native_openharmony" // 指向源码路径
  }
}

"dependencies": {
    "@react-native-ohos/react-native-udp": "file:../../node_modules/@react-native-ohos/react-native-udp/harmony/react_native_udp.har"
  }

cd entry
ohpm install

+ set(OH_MODULES "${CMAKE_CURRENT_SOURCE_DIR}/../../../oh_modules")

# RNOH_BEGIN: manual_package_linking_1
+ add_subdirectory("${OH_MODULES}/@react-native-ohos/react-native-udp/src/main/cpp" ./rnoh_udp)
# RNOH_END: manual_package_linking_1

# RNOH_BEGIN: manual_package_linking_2
+ target_link_libraries(rnoh_app PUBLIC rnoh_udp)
# RNOH_END: manual_package_linking_2

#include "RNOH/PackageProvider.h"
#include "generated/RNOHGeneratedPackage.h"
+ #include "UdpPackage.h"

using namespace rnoh;

std::vector<std::shared_ptr<Package>> PackageProvider::getPackages(Package::Context ctx) {
    return {
        std::make_shared<RNOHGeneratedPackage>(ctx),
+       std::make_shared<UdpPackage>(ctx),
    };
}

  ...
+ import {RNUdpPackage} from '@react-native-ohos/react-native-udp/ts';

export function createRNPackages(ctx: RNPackageContext): RNPackage[] {
  return [
+   new RNUdpPackage(ctx)
  ];
}

2.5. 运行

点击右上角的 sync 按钮

或者在命令行终端执行：

cd entry
ohpm install

然后编译、运行即可。

3. 约束与限制

3.1. 兼容性

本文档内容基于以下版本验证通过：

1. RNOH: 0.72.96; SDK: HarmonyOS 6.0.0 Release SDK; IDE: DevEco Studio 6.0.0.858; ROM: 6.0.0.112;
2. RNOH: 0.72.33; SDK: HarmonyOS NEXT B1; IDE: DevEco Studio: 5.0.3.900; ROM: Next.0.0.71;
3. RNOH: 0.77.18; SDK: HarmonyOS 6.0.0 Release SDK; IDE: DevEco Studio 6.0.0.858; ROM: 6.0.0.112;
4. RNOH: 0.82.7; SDK: HarmonyOS 6.0.0 Release SDK; IDE: DevEco Studio 6.0.0.858; ROM: 6.0.0.112;

3.2. 权限要求

3.3. 编译运行API要求

4. 属性

5. 静态方法

6. API

7. 遗留问题

8. 其他

9. 开源协议

本项目基于 The MIT License (MIT) ，请自由地享受和参与开源。