Question

我正在创建一个客户端 - 服务器应用程序，它只是通过套接字从java服务器发送和接收JSON。所以它通过Wi-Fi连接工作。但是当我使用移动数据连接时，我的应用程序无法连接到服务器。错误：

java.net.SocketTimeoutException: failed to connect to /37.59.196.27 (port 8080) after 90000ms

这是我的代码：

MultiClient.java

...
    InetAddress addr = InetAddress.getByName("37.59.196.27");
    ClientThread ct = new ClientThread(addr, map);
    Thread.currentThread().sleep(100);
...

ClientThread.java

/*imports here*/
class ClientThread extends Thread {
    private Socket socket;
    private BufferedReader in;
    private PrintWriter out;
    private static int counter = 0;
    private int id = counter++;
    private static int threadcount = 0;
    private static String IMEI = "";
    private static String NAME = "";
    static final int PORT = 8080;
    public static int threadCount() {
        return threadcount;
    }
    HashMap<String, String> inputMap;
    private HashMap<String,String> returnMap;
    public HashMap<String, String> getData(){
        return returnMap;
    }
    public ClientThread(InetAddress addr, HashMap<String, String> inputMap) {
        returnMap=new HashMap<String, String>();
        this.inputMap=inputMap;
        System.out.println("Making client " + id);
        threadcount++;
        try {
            socket = new Socket(addr, PORT);
            socket.setSoTimeout(0);
        }
        catch (IOException e) {
            e.printStackTrace();
            System.err.println(e.getMessage());
            Log.i("socket", e.getMessage());
            System.err.println("Socket failed");
        }
        try {
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(
                    socket.getOutputStream())), true);
            start();
        }
        catch (IOException e) {
            try {
                socket.close();
            }
            catch (IOException e2) {
                System.err.println("Socket not closed");
            }
        }
    }

    public void run() {
        try {
            IMEI = inputMap.get("imei");
            NAME = inputMap.get("name");

            Log.i("ClientThread", "here");
            JSONObject obj = new JSONObject();
            obj.put("imei", IMEI);
            obj.put("name", NAME);
            obj.put("os", inputMap.get("os"));
            obj.put("osVersion", inputMap.get("osVersion"));
            out.println(obj);
            String str = in.readLine();
            //System.out.println(obj);
            //SERVER ANSWER:
            JSONParser parser = new JSONParser();
            Object jobj = parser.parse(str);
            JSONObject jsonObj = (JSONObject)jobj;
            String text = jsonObj.get("text").toString();
            Log.i("RESPONSE STRING","Image source:    "+jsonObj.get("imagesrc")+"\nPrediction text: "+text);
           // returnMap.put("imagesrc", jsonObj.get("imagesrc").toString());
           // Log.i("text",text);
            returnMap.put("text", text);
            //System.out.println("Server: "+str);
            out.println("END");
        }
        catch (IOException e) {
            System.err.println("IO Exception");
        }
        catch(Exception e){
            e.printStackTrace();
        }
        finally {
            try {
                socket.close();
            }
            catch (IOException e) {
                System.err.println("Socket not closed");
            }
            threadcount--;
        }
    }
}

服务器没有看到使用移动数据创建的连接，因此不存在服务器问题。

谢谢，对不起我的英文！

Answer 1

问题隐藏在我的固件中，因此重新安装解决了这个问题。

无法通过socket android连接到服务器

1 个答案: