javascript - isConnected failed: ECONNREFUSED (Connection refused) -

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i try transfer data between phones via wifi-direct , code works fine everyfirst time run through it. however, after close sockets in both client , server , try connect socket again, gives me exception. also, after lock screen of server phone , unlock it, can built connection once again. can familar socket give me advice? shouldn't wrong ip address/port right?

code client phone

protected void onhandleintent(intent intent) {            context context = getapplicationcontext();          if (intent.getaction().equals(action_send_file)) {              if(!socket.isconnected())              {                  string host = intent.getextras().getstring(                          extras_group_owner_address);                  int port = intent.getextras().getint(extras_group_owner_port);                  try {                      socket.bind(null);                      inetsocketaddress myaddress = new inetsocketaddress(host, port);                      socket.connect(myaddress, socket_timeout);                  }                  catch(ioexception e) {                      log.e(tag, e.getmessage());                  }              }                  try{  				     /*returns output stream write data socket*/                      outputstream stream = socket.getoutputstream();                      string count = string.valueof(_count);                      stream.write(count.getbytes());                                } catch (ioexception e) {                  log.e(tag, e.getmessage());              } {                  if (socket != null) {                        if (socket.isconnected()) {                            try {                              inputstream = socket.getinputstream();                              socket.shutdownoutput(); // sends 'fin' on network                              while (is.read() >= 0) ; // "read()" returns '-1' when 'fin' reached                              socket.close();                          }                            catch (ioexception e) {                              // give                              e.printstacktrace();                          }                        }                  }              }            }      }

code server phone

protected string doinbackground(void... params) {          try {              serversocket serversocket = new serversocket(8888);              socket client = serversocket.accept();              inputstream inputstream = client.getinputstream();              bytearrayoutputstream baos = new bytearrayoutputstream();              int i;              while ((i = inputstream.read()) != -1) {                  baos.write(i);              }              string str = baos.tostring();              client.shutdownoutput(); // sends 'fin' on network              while (inputstream.read() >= 0) ; // "read()" returns '-1' when 'fin' reached              client.close(); // can close socket              serversocket.close();              return str;            } catch (ioexception e) {              return null;          }      }


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