Android socket receive data

Question

I am new with android development so if any further information needed plz ask... I am trying to use sockets to send coordinates to server, receive query results and "Toast" them. Until now in my activity:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_socket);

    new Thread(new ClientThread()).start();     

}
      ...

 class ClientThread implements Runnable {
             @SuppressWarnings("deprecation")
            @Override
             public void run() {
                 try {
                     InetAddress serverAddr = InetAddress.getByName(SERVER_IP);
                     socket = new Socket(serverAddr, SERVERPORT);

                 } catch (UnknownHostException e1) {
                     e1.printStackTrace();
                 } catch (IOException e1) {
                     e1.printStackTrace();
                 }
             }
         }


      public void onClickk(View view) {
             try {
                // Acquire a reference to the system Location Manager
                LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);............here some more code regarding coordinates. ............

And I am writing through the socket the coordinates (in the same method):

                        lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);

                        if (lat!=null){

                            String json = "";

                            // 3. build jsonObject
                            JSONObject jsonObject = new JSONObject();
                            try {
                                jsonObject.accumulate("lat", lat);
                                jsonObject.accumulate("lon", lon);
                            } catch (JSONException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                            // 4. convert JSONObject to JSON to String
                            json = jsonObject.toString();

                         PrintWriter out = new PrintWriter(new BufferedWriter(
                                 new OutputStreamWriter(socket.getOutputStream())),
                                 true);
                         out.println(json);

How I can receive data sent from the server? I am not sure how to use the InputSteam.

UPDATE: My server. WHen a message is received from the app the server tries to write a string on the socket.

       sock.on('data', function(data) {

          console.log('DATA ' + sock.remoteAddress + ': ' + data);

          sock.write(la);
       });

       });

Answer 1

class Client extends Thread {

    public void run()
    {
         try
         {
              Socket socket = new Socket(address, PORT);
              PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
              out.println(json);
              BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
              String response = in.readLine()
              Toast.makeText(MainActivity.this, response, Toast.LENGTH_SHORT).show();
              socket.close();
         }
         catch(Exception e) {}
    }
}