简单的 UDP 广播不适用于 Android Wear [英] Simple UDP Broadcast not working on Android Wear

问题描述

我只想让我的 UDP 广播正常工作:

All I want is my UDP broadcast to work:

    @Override
    protected String doInBackground(String[] params) {
        try {
            DatagramSocket datagramSocket = new DatagramSocket();
            datagramSocket.setBroadcast(true);
            byte[] buffer = "test".getBytes();
            DatagramPacket packet = new DatagramPacket(buffer, buffer.length, InetAddress.getByName("192.168.0.255"), 8899);
            datagramSocket.send(packet);
            System.out.println("Package sent.");
            System.out.println("Data: " + buffer);
            System.out.println("Broadcast address: " + this.broadcastAddress);
            System.out.println("--------------------------");
        } catch (Exception e) {
            System.out.println("Package not sent: " + e.getMessage());
            e.printStackTrace();
        }
        return "complete";
    }

此代码通过按钮在 onClick 事件上执行，并且位于 AsyncTask 中.

This code gets executed on an onClick event by a button and is inside an AsyncTask.

2次点击的日志是:

System.out﹕ Package sent.
System.out﹕ Data: [B@3b9b0914
System.out﹕ Broadcast address: /192.168.0.255
System.out﹕ --------------------------
System.out﹕ Package sent.
System.out﹕ Data: [B@3090d7b2
System.out﹕ Broadcast address: /192.168.0.255
System.out﹕ --------------------------

所以看起来它正在工作.但不是因为我无法用 Wireshark 捕获它.

So it looks like it's working. But it's not since I can't catch it with Wireshark.

我尝试过在手机上使用 UDP 包发送器，效果很好.

What I've tried is using an UDP package sender on my phone, and that works.

也许是因为我不能在我的手表上发送这样的 UDP 包?有人知道要搜索什么吗?

Maybe it's because I can't send UDP packages like this on my watch? Does anyone have an idea on what to search for?

推荐答案

您是对的:Android Wear 设备本身无法访问互联网:您的手机应用需要处理所有互联网连接并将结果转发到您的 Wearable 应用通过穿戴数据层

You are correct: Android Wear devices do not have access to the internet themselves: your phone app needs to handle all internet connections and forward the results to your Wearable app via the Wear Data Layer

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