Android Async Tcp Client Send then close

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Mobile

Android

Hi,
i use Async Tcp Server on Android and it works like receive message but it isnt show when the client disconnect it show the message.
How can i fix this?

OR

i write Async Tcp Client code :

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

        String dstAddress;
        int dstPort;
        String response = "";

        MyClientTask(String addr, int port) {
            dstAddress = addr;
            dstPort = port;
        }
        PrintWriter out                               ;
        @Override
        protected Void doInBackground(Void... arg0) {

            Socket socket = null;

            try {
                socket = new Socket(dstAddress, dstPort);

                out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);
                out.println("VB");
                out.flush();
                ByteArrayOutputStream byteArrayOutputStream =
                        new ByteArrayOutputStream(1024);
                byte[] buffer = new byte[1024];

                int bytesRead;
                InputStream inputStream = socket.getInputStream();

    /*
     * notice:
     * inputStream.read() will block if no data return
     */
                while ((bytesRead = inputStream.read(buffer)) != -1) {
                    byteArrayOutputStream.write(buffer, 0, bytesRead);
                    response += byteArrayOutputStream.toString("UTF-8");
                }

            } catch (UnknownHostException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                response = "UnknownHostException: " + e.toString();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                response = "IOException: " + e.toString();
            } finally {
                if (socket != null) {
                    try {
                        socket.close();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            text.setText(response);
            super.onPostExecute(result);
        }
    }

i want to do the client connect then send message and close the connection when user click button again it do same thing again.How can i do this?