网络是一种痛苦。在使用AsyncTasks的服务中,我尝试启动套接字通信:

public class TransmitService extends Service {

    private Socket echoSocket = null;
    private static PrintWriter out = null;
    private String HOST = null;
    private int PORT = -1;
    private static Context context;
    public static boolean isConnected = false;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO do something useful
        context = getApplicationContext();
        HOST = intent.getExtras().getString("HOST");
        PORT = intent.getExtras().getInt("PORT");
        Toast.makeText(context, "HOST/PORT: "+HOST+"/"+PORT, Toast.LENGTH_LONG).show();
        new initNetworkTask().execute();
        return Service.START_NOT_STICKY;
    }

    // Send the orientation data
    public static void sendData(float f1, float f2, float f3) {
        new sendDataTask().execute(f1, f2, f3);
    }

    static class sendDataTask extends AsyncTask<Float, Void, Void> {

        @Override
        protected Void doInBackground(Float... params) {
            try {
                JSONObject j = new JSONObject();
                j.put("yaw", params[0]);
                j.put("pitch", params[1]);
                j.put("roll", params[2]);
                String jString = j.toString();
                out.println(jString);
            } catch (Exception e) {
                Log.e("sendDataTask", e.toString());
            }
            return null;
        }

    }

    class initNetworkTask extends AsyncTask<Void, Void, Void> {
        @Override
        protected Void doInBackground(Void... params) {
            try {
                echoSocket = new Socket(HOST, PORT);
                out = new PrintWriter(echoSocket.getOutputStream(), true);
                out.println("Welcome.");
                isConnected = true;
            } catch (Exception e) {
                Log.e("initNetworkTask", e.toString());
                isConnected = false;
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO for communication return IBinder implementation
        return null;
    }
}


我的“服务器”只是笔记本电脑上运行的python脚本:

import socket

HOST = '192.168.###.#'     #(numbers omitted from S/O question)
PORT = 10000
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(1)
conn, addr = s.accept()
print 'Connected by', addr
while 1:
    data = conn.recv(1024)
    if data is not None:
        print data
conn.close()


以下服务器可以与在同一台笔记本电脑上运行的Java客户端配合使用:

public class DataSender {
    public static void main(String[] args) throws IOException {

        Socket echoSocket = null;
        PrintWriter out = null;
        //BufferedReader in = null;

        try {
            echoSocket = new Socket("192.168.###.#", 10000);
            out = new PrintWriter(echoSocket.getOutputStream(), true);
            //in = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host: taranis.");
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for " + "the connection to: taranis.");
            System.exit(1);
        }

        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
        String userInput;

        while ((userInput = stdIn.readLine()) != null) {
            out.println(userInput); //out.println - THIS IS HOW DATA IS SENT
            //System.out.println("echo: " + in.readLine());
        }

        out.close();
        //in.close();
        stdIn.close();
        echoSocket.close();
    }
}


我真的很想让它在我的Android应用程序中工作-我的目的是通过TransmitService.sendData(f1,f2,f3)将定位数据连续流式传输到我的笔记本电脑。

在测试方面:我关闭了Windows防火墙,在同一WiFi连接(Starbucks)上进行了测试,并尝试了其他一些端口(80、4444、4445、5000)。

我在Android应用中收到的评论错误是:

java.net.ConnectException: failed to connect to /192.168.###.# (port 10000): connection failed: ETIMEDOUT (Connection timed out)

感谢您的关注,我们很乐意提供更多信息/运行更多测试以解决此问题。我也有兴趣考虑其他解决方案,以通过互联网将方向数据从手机发送到笔记本电脑。

最佳答案

噢,男孩,这是愚蠢和尴尬的。基本上,我使用了错误的IP地址(192.168 ....)。

在Windows中,使用ipconfig(Linux:ifconfig),然后选择与无线LAN(wlan)相对应的IP地址。我正在使用与虚拟机或废话相对应的另一个IP地址。

希望以后对其他人有帮助,我讨厌这些问题。

关于java - Android Socket无法连接到笔记本电脑服务器-但是本地Java程序可以,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/17798521/

10-10 19:27