socket()未在服务器未运行的情况下引发异常

我已经编写了一个客户端,在Android设备(Android6)上运行,当服务器启动并运行时,它会连接,但是当服务器关闭时,socket()调用会抛出一个异常,但它不会。

我最初用NDK尝试过,遇到了一个非常相似的问题。( Android NDK socket connect() returning 0 when it should fail whilst on 3g )

我假设这是Android在这一点上的一个bug,但是任何对解决方案或解决方案的洞察都会受到赞赏。

相关代码:

public class Client implements Runnable{

    private Socket socket;
    private InetAddress IP;
    private int port;

    public Client(int port){
        try {
            this.IP = InetAddress.getByName(server ip);
        }
        catch(UnknownHostException e){
            Log.d("App1", "Unknown Host, connection failed");
            System.exit(1);
        }
        this.port = port;
        Log.d("App1", "initialised");
    }

    @Override
    public void run(){
        try {
            this.socket = new Socket(this.IP, this.port);
            Log.d("FiX1", "Connected");
            listen();
        }
        catch(IOException e){
            Log.d("FiX1,","connection failed");
            System.exit(1);
        }
        finally
        {
            try{
                socket.close(); // dispose
            }
            catch(IOException e){
                System.exit(1);
            }

        }


    }

   public void listen() {
        try {
            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

            while (true) {
                String cominginText = "";
                try {
                    cominginText = in.readLine();
                    Log.d("FiX1",cominginText);
                } catch (IOException e) {
                    //error ("System: " + "Connection to server lost!");
                    System.exit(1);
                    break;
                }
            }
        } catch (IOException e) {
            System.exit(1);
        }
    }



}