#鸿蒙通关秘籍#如何在HarmonyOS NEXT中处理UDP异步绑定和消息接收？

在HarmonyOS NEXT中，使用Promise与回调结合处理UDP异步绑定和消息接收，确保非阻塞执行。以下是实现的步骤：

1. 异步绑定端口：

   let localAddress = { address: "0.0.0.0", port: 9990, family: 1 };
   
   udpSocket.bind(localAddress)
      .then(() => {
         console.log('绑定成功');
      })
      .catch((e) => {
         console.error('绑定失败: ' + e.message);
      });
   

2. 接收消息并处理：

   udpSocket.on("message", (value) => {
      let message = buf2String(value.message);
      let remoteInfo = value.remoteInfo;
      console.log(`Received message from ${remoteInfo.address}:${remoteInfo.port} - ${message}`);
   });
   
   function buf2String(buf) {
      let msgArray = new Uint8Array(buf);
      return new TextDecoder("utf-8").decode(msgArray);
   }