java - Android 中的服务器-客户端故障(套接字未绑定(bind)/套接字已在使用中)

Question

海霍，

好吧，我的问题对我来说解释起来有点棘手。我尝试将我的安卓平板电脑 (4.0.3) 连接到 RS-232 转换器。这已经有效，但只是单向的。如果我尝试发送任何东西，它就会被发送。我无法收到任何答案，但这是必要的。我明白了

    Logcat Errors: Either Socket is not bound, or EADRESS already in use.

我尝试了多种方法，但没有一种能满足我的需要。

我的目标:在发送字节时发送和接收字节。

我的架构: MainActivity -> 调用 2 个异步任务1.网络，2.并发服务器网络必须通过 DataOutputStream 发送我的命令。好的在这里。ConcurrentServer 必须使用 DataInputStream 接收传入数据，将其交给 ConcurrentServer 类中的方法。此方法应发送一个应答字节。

我的 ConcurrentServer 没有收到，该方法也没有发送任何东西......

我希望你能帮助我。

代码:

package com.example.wettkampftimerbt;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketAddress;

import org.apache.http.client.protocol.ClientContext;

import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;

public class ConcurrentServer extends AsyncTask<Void, Void, Void>{

    private final String LFDNR1 = "lfdnr1";
    private final String LFDNR2 = "lfdnr2";
    private final String LFDNR3 = "lfdnr3";
    private final String LFDNR4 = "lfdnr4";
    private final String LFDNR5 = "lfdnr5";
    private final String LFDNR6 = "lfdnr6";
    private final String LFDNR7 = "lfdnr7";
    private final String LFDNR8 = "lfdnr8", PREFS_NAME = "prefs",
            COMMAND = "command", LANE = "lane", DINYMIN ="dinymin", DINYSEK="dinysek";

    int w1, w2, w3, w4, w5, w6, w7, w8, diny1, diny2, diny3, diny4, diny5,
            diny6, diny7, diny8, dinymin, dinysek;
    Context context;
    ServerSocket sock;
    Socket ss;



        protected Void doInBackground (Void... arg0) {
            System.out.println("ConcurrentServer_doInBackgorund");
            Log.e("SERVER", "CON");
        try {
            sock = new ServerSocket(2010);
            ss = sock.accept();
            sock.setReuseAddress(true);
            sock.bind(new InetSocketAddress(2010));

            ss.setReuseAddress(true);
            ss = new Socket("192.168.0.100", 2011);
            sock.setSoTimeout(1000);
            for (;;) {
                boolean stopData = true;    
                BufferedReader din = new BufferedReader(new
                        InputStreamReader(ss.getInputStream()));


                //DataInputStream din = new DataInputStream(
                    //  ss.getInputStream());
                while (stopData) {
                // Einlesen
                diny1 = (din).read();// 03
                diny2 = (din).read();// Empfänger(90...97)
                diny3 = (din).read();// Sender(80)
                diny4 = (din).read();// lfdnr
                diny5 = (din).read();// Kommando(Start, Stop...)
                if (diny5==79){
                dinymin = (din).read();//Minuten
                dinysek = (din).read();//Sekunden
                }
                diny6 = (din).read();// Prüfsumme
                diny7 = (din).read();// 05
                din.close();
                //ss.close();
                //sock.close();
                System.out
                        .println("diny: " + diny1 + " " + diny2 + " " + diny3
                                + " " + diny4 + " " + diny5 + " " + diny6 + " "
                                + diny7);
                Log.e("Reccom", "RECCOM");
                reccom();


                stopData=false;
                }
            }
        } catch (Exception e) {
            System.out.println("IO error" + e);}
        return null;
        }



    public int getLFDNR1(Context context) {
        System.out.println("ConcurrentServer_getlfdnr1");
        w1 = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE).getInt(LFDNR1, 00);
        //w1 = Integer.valueOf(LFDNR1);
        return w1;
    }

    public String getLFDNR2(Context context) {
        System.out.println("ConcurrentServer_getlfdnr2");
        w2 = Integer.valueOf(LFDNR2);
        return LFDNR2;
    }

    public String getLFDNR3(Context context) {
        System.out.println("ConcurrentServer_getlfdnr3");
        w3 = Integer.valueOf(LFDNR3);
        return LFDNR3;
    }

    public String getLFDNR4(Context context) {
        System.out.println("ConcurrentServer_getlfdnr4");
        w4 = Integer.valueOf(LFDNR4);
        return LFDNR4;
    }

    public String getLFDNR5(Context context) {
        System.out.println("ConcurrentServer_getlfdnr5");
        w5 = Integer.valueOf(LFDNR5);
        return LFDNR5;
    }

    public String getLFDNR6(Context context) {
        System.out.println("ConcurrentServer_getlfdnr6");
        w6 = Integer.valueOf(LFDNR6);
        return LFDNR6;
    }

    public String getLFDNR7(Context context) {
        System.out.println("ConcurrentServer_getlfdnr7");
        w7 = Integer.valueOf(LFDNR7);
        return LFDNR7;
    }

    public String getLFDNR8(Context context) {
        System.out.println("ConcurrentServer_getlfdnr8");
        w8 = Integer.valueOf(LFDNR8);
        return LFDNR8;
    }
    private void reccom() throws IOException {
        System.out.println("ConcurrentServer_reccom");
        if (diny1 == 3 && diny7 == 5) {
            answer();
        } else {
        }

        switch (diny2) {
        case (144): // 144=90=Bahn1
            c144(context);
            break;
        case (145): // 145=91=Bahn2
            c145(context);
            break;
        case (146): // 146=92=Bahn3
            c146(context);
            break;
        case (147): // 147=93=Bahn4
            c147(context);
            break;
        case (148): // 148=94=Bahn5
            c148(context);
            break;
        case (149): // 149=95=Bahn6
            c149(context);
            break;
        case (150): // 150=96=Bahn7
            c150(context);
            break;
        case (151): // 151=97=Bahn8
            c151(context);
            break;
        }

    }

    private void answer() throws IOException {
        System.out.println("ConcurrentServer_answer");
    Socket sock ;
    int w0=0,w5=32;
         SocketAddress sockaddr = new InetSocketAddress("192.168.0.100", 2011);  
         sock = new Socket();  
         int timeout = 1000;   // 1000 millis = 1 second  
         sock.connect(sockaddr, timeout); 
        boolean stopData = true;
        DataOutputStream dos = new DataOutputStream(sock.getOutputStream());
        while (stopData) {
            dos.writeByte(w0);
            dos.writeByte(diny1);
            dos.writeByte(diny3);
            dos.writeByte(diny2);
            dos.writeByte(diny4);
            dos.writeByte(w5);
            dos.writeByte(diny6);
            dos.writeByte(diny7);
            dos.flush();
            //dos.close();
            stopData = false;}

    }

    private void c151(Context context) {
        System.out.println("ConcurrentServer_c151");
        getLFDNR8(context);
        if (w1 == diny4||(w1-1)==diny4)
            switch (diny5) {
            case (00):
            case (79): {

                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(LANE, "151").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(COMMAND, "79").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYMIN, Integer.valueOf(dinymin).toString()).commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYSEK, Integer.valueOf(dinysek).toString()).commit();
            }
                break;
            }
        else {
            System.out.println("lfdnr8 passt nicht");
        }
    }

    private void c150(Context context) {
        System.out.println("ConcurrentServer_c150");
        getLFDNR7(context);
        if (w1 == diny4||(w1-1)==diny4)
            switch (diny5) {
            case (00):
            case (79): {
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(LANE, "150").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(COMMAND, "79").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYMIN, Integer.valueOf(dinymin).toString()).commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYSEK, Integer.valueOf(dinysek).toString()).commit();
            }
                break;
            }
        else {
            System.out.println("lfdnr7 passt nicht");
        }
    }

    private void c149(Context context) {
        System.out.println("ConcurrentServer_c149");
        getLFDNR6(context);
        if (w1 == diny4||(w1-1)==diny4)
            switch (diny5) {
            case (00):
            case (79): {
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(LANE, "149").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(COMMAND, "79").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYMIN, Integer.valueOf(dinymin).toString()).commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYSEK, Integer.valueOf(dinysek).toString()).commit();
            }
                break;
            }
        else {
            System.out.println("lfdnr6 passt nicht");
        }
    }

    private void c148(Context context) {
        System.out.println("ConcurrentServer_c148");
        getLFDNR5(context);
        if (w1 == diny4||(w1-1)==diny4)
            switch (diny5) {
            case (00):
            case (79): {
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(LANE, "148").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(COMMAND, "79").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYMIN, Integer.valueOf(dinymin).toString()).commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYSEK, Integer.valueOf(dinysek).toString()).commit();
            }
                break;
            }
        else {
            System.out.println("lfdnr5 passt nicht");
        }
    }

    private void c147(Context context) {
        System.out.println("ConcurrentServer_c147");
        getLFDNR4(context);
        if (w1 == diny4||(w1-1)==diny4)
            switch (diny5) {
            case (00):
            case (79): {
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(LANE, "147").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(COMMAND, "79").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYMIN, Integer.valueOf(dinymin).toString()).commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYSEK, Integer.valueOf(dinysek).toString()).commit();
            }
                break;
            }
        else {
            System.out.println("lfdnr4 passt nicht");
        }
    }

    private void c146(Context context) {
        System.out.println("ConcurrentServer_c146");
        getLFDNR3(context);
        if (w1 == diny4||(w1-1)==diny4)
            switch (diny5) {
            case (00):
            case (79): {
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(LANE, "146").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(COMMAND, "79").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYMIN, Integer.valueOf(dinymin).toString()).commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYSEK, Integer.valueOf(dinysek).toString()).commit();
            }
                break;
            }
        else {
            System.out.println("lfdnr3 passt nicht");
        }
    }

    private void c145(Context context) {
        System.out.println("ConcurrentServer_c145");
        getLFDNR2(context);
        if (w1 == diny4||(w1-1)==diny4)
            switch (diny5) {
            case (00):
            case (79): {
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(LANE, "145").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(COMMAND, "79").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYMIN, Integer.valueOf(dinymin).toString()).commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYSEK, Integer.valueOf(dinysek).toString()).commit();
            }
                break;
            }
        else {
            System.out.println("lfdnr2 passt nicht");
        }
    }

    private void c144(Context context) {
        System.out.println("ConcurrentServer_c144");
        final String PREFS_NAME = "prefs";
        final String COMMAND = "command";
        final String LANE = "lane", DINYMIN ="dinymin", DINYSEK="dinysek";
        getLFDNR1(context);
        if (w1 == diny4||(w1-1)==diny4)
            switch (diny5) {
            case (00):
            case (79): {
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(LANE, "144").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                        .edit().putString(COMMAND, "79").commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYMIN, Integer.valueOf(dinymin).toString()).commit();
                context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
                .edit().putString(DINYSEK, Integer.valueOf(dinysek).toString()).commit();
            }
                break;
            }
        else {
            System.out.println(w1+ "+"+ diny4);
            System.out.println("lfdnr1 passt nicht");
        }

    }

    public ConcurrentServer(Context context) {
        System.out.println("ConcurrentServer_Context");
        this.context = context;

    }



}

如果您认为您也需要网络代码，请告诉我。顺便说一句:这是我现在的代码，经过试验和尝试了很多东西。所以如果任何东西翻倍，这就是原因。由于我是 Android 的新手，这可能发生在我身上。

谢谢。

编辑:

Class Stacker 提供的这个链接非常好。它详细而精确。对于遇到问题的任何人，请检查以下内容:

http://docs.oracle.com/javase/tutorial/networking/urls/index.html

再次感谢 Class Stacker!

Answer 1

1. 请注意，根据您的 Android 版本，AsyncTasks 不会并行执行，除非您明确指定执行程序。

2. 我想您必须主动连接到转换器设备。如果是这样，则您没有服务器套接字；它实际上是一个客户端套接字。

3. 我不明白为什么一路上要创建这么多套接字；套接字是双向通信 channel 。

4. 如果您确实需要一个服务器套接字，您可以等待传入的连接，您可以accept() 和accept() 将为您提供特定于客户端的套接字。

这有帮助；如果不是，就我而言，您需要使用有关您正在连接的设备的信息更新您的问题。