Datenübertragung zwischen Server PC und Client Android

@Override
protected Void doInBackground(Void... arg0) {

    Cursor res = My_Database.getAllData();
    if (res.getCount() == 0){

        Intent click_datenbank = new Intent(daten_transfer.this,pop_datenbank.class);
        startActivity(click_datenbank);

    }else {

        Socket socket = null;

        try {

            SocketAddress sock_addresse = new InetSocketAddress(dstAddress, dstPort);
            socket = new Socket();
            int timeoutMs = 1000;
            socket.connect(sock_addresse, timeoutMs);

            SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy, HH:mm");
            String dateTime = sdf.format(new Date());

            ByteArrayOutputStream bAPS = new ByteArrayOutputStream(1024);
            byte[] server_Name = new byte[1024];
            int server_Information;

            InputStream input_Message = socket.getInputStream();

            OutputStream out_Username = socket.getOutputStream();
            OutputStream out_1 = socket.getOutputStream();
            OutputStream out_2 = socket.getOutputStream();

            while ((server_Information = input_Message.read(server_Name)) != -1) {

                bAPS.write(server_Name, 0, server_Information);
                response += bAPS.toString("UTF-8");

                PrintStream print_userName = new PrintStream(out_Username);
                print_userName.print(userName);

                String Arbeitsliste = "hier mehrere Listen in einer Liste";
                PrintStream data_1 = new PrintStream(out_1);
                data_1.print(Arbeitsliste);

                String Materialliste = "hier mehrere Listen in einer Liste";
                PrintStream data_2 = new PrintStream(out_2);
                data_2.print(Materialliste);

            }

        } catch (UnknownHostException e) {
            e.printStackTrace();
            failMessage = "IP-ADRESSE UNBEKANNT!";

        } catch (IOException e) {
            e.printStackTrace();
            failMessage = "BAREBONE NICHT ERREICHBAR!";
        }finally{
            if(socket != null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                    failMessage = "IO-Exception: " + e.toString();
                }
            }
        }
    }

    return null;
}

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import socket
import sys
import datetime

streamSock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

get_IP = [ip for ip in socket.gethostbyname_ex(socket.gethostname())[2] if not ip.startswith("127.")][:1]

port = 9999
server_address = ((ip,port))

for ip_adresse in get_IP:

    try:
        streamSock.bind(server_address)
        print '\nServer gestartet...\nIP-Adresse: %s\n' % (ip)

    except streamSock as s_err:
        if s_err == errno.ECONNREFUSED or s_err == errno.ECONNRESET:
            print('Kein Internethost verfuegbar!\nServer kann nicht gestartet werden!')

streamSock.listen(25)
kontakt = 0

while True:
    client,addr = streamSock.accept()

    now = datetime.datetime.now()
    currentTime = now.strftime("%d.%m.%Y, %H:%M:%S")

    serverNameDatum = "Stream "+str(kontakt)+(":\n---> DMD-Server ("+currentTime+")\n")
    client.send(serverNameDatum)

    userName = client.recv(1024)
    print ("-------")
    print ("Stream "+str(kontakt)+(": ---> "+str(userName)+" ("+currentTime+")"))

    data_1 = client.recv(2024)
    print data_1

    data_2 = client.recv(3024)
    print data_2

    client.close()
    kontakt += 1

streamSock.close()

    public class MyClientTask extends AsyncTask<List, Void, String> {

        String dstAddress;
        int dstPort;
        String response = "";
        String failMessage = "";
        String userName = "Hans Hase";

        MyClientTask(String addr) {
            dstAddress = addr;
            dstPort = 9999;
        }

        @Override
        protected String doInBackground(List... lists) {
            return null;
        }

    }