sockets - Communication on 2 ports between 2 Android devices using WiFi Direct -

i creating application monitor movements in particular android device (client) , report such instances android device (server). also, under specific conditions, client take picture , transmit image server.

i using wifi direct setup connection between 2 devices. after using socket connections explained in wifi direct demo. using port 8988 send motion sensor events , using port 8987 send images capture.

on server side, using 2 different instances of same async task serversocket connecting different ports listen incoming messages. works fine long motion sensor events being sent across. first image capture being sent/received correctly. however, after server doesn't receive additional messages. tried having 2 different async task classes avoid having 2 instances of same class didn't work well. tried having 1 async task , intent service doesn't work.

this intentservice using send messages across server.

public class messagesender extends intentservice {      public static final string extras_timeout = "timeout";     public static final string extras_address = "go_host";     public static final string extras_port = "go_port";     public static final string extras_data = "data";      private handler handler;      public messagesender(string name) {         super(name);     }      public messagesender() {         super("messagetransferservice");     }      @override     public int onstartcommand(intent intent, int flags, int startid) {         handler = new handler();         return super.onstartcommand(intent, flags, startid);     }      @override     protected void onhandleintent(intent intent) {              string host = intent.getextras().getstring(extras_address);             socket socket = new socket();             int port = intent.getextras().getint(extras_port);             byte[] data = intent.getextras().getbytearray(extras_data);             int timeout = intent.getextras().getint(extras_timeout);             try {                 socket.bind(null);                 socket.connect((new inetsocketaddress(host, port)), timeout);                 outputstream stream = socket.getoutputstream();                 stream.write(data);             } catch (final ioexception e) {                 handler.post(new runnable() {                     @override                     public void run() {                         toast.maketext(getapplicationcontext(), "exception has occurred: " + e.getmessage(),                                 toast.length_short).show();                     }                 });             } {                 if (socket != null) {                     if (socket.isconnected()) {                         try {                             socket.close();                             /*handler.post(new runnable() {                                 @override                                 public void run() {                                     toast.maketext(getapplicationcontext(), "socket connection closed now..",                                             toast.length_short).show();                                 }                             });*/                         } catch (ioexception e) {                             // give                             e.printstacktrace();                         }                     }                 }             }     } } 

this async task on server starts listeners on 2 ports (8987 , 8988) receiver information of motion sensor events , images.

public class messagereceiver extends asynctask<void, void, string> {      private context context;     private int port;     private bitmap mbitmap;      public messagereceiver(context context, int port) {         this.context = context;         this.port = port;     }      @override     protected string doinbackground(void... params) {         try {             serversocket serversocket = new serversocket(port);             socket client = serversocket.accept();             inputstream inputstream = client.getinputstream();             string returnstring = "";             if (port == mainactivity.port_sensor_comm) {                //             } else if (port == mainactivity.port_image_comm) {                 //do             }             serversocket.close();             return returnstring;         } catch (exception e) {             return "exception occurred:" + e.getmessage();         }     }      @override     protected void onpostexecute(string result) {         boolean startnewtask = true;         if (port == mainactivity.port_sensor_comm) {             //do         } else if (port == mainactivity.port_image_comm) {             //do         }         //doing start listening new messages again         new messagereceiver(context, port).executeonexecutor(asynctask.thread_pool_executor);     }      @override     protected void onpreexecute() {      }  } 

i wondering whether android wifidirect allows parallel communication between 2 devices on different ports. searched docs could'nt find help. doing wrong? correct method accomplish trying do? appreciated. looking.