java - Socket Timeout Issue: android client reading data from pc server -


i'm new android, java , socket programming of course i'm trying merge three!

i'm creating desktop based java server send short string android app(client).

i have android app running fine , sends strings server read no problems.

i have server running , recieves strings no problems.

the app(client) has socket timeout whenever try read strings returned server. i'm using same code can't understand problem.

anyway here's code:

//server//  import java.io.*; import java.net.*; import java.util.*;  public class gpsserver {      serversocket serversocket = null;     socket socket = null;      public gpsserver()      {         try         {             serversocket = new serversocket(8189);         }          catch (unknownhostexception unhe)          {             system.out.println("unknownhostexception: " + unhe.getmessage());         }          catch (interruptedioexception intioe)          {             system.out.println("timeout while attempting establish socket connection.");         } catch (ioexception ioe)          {             system.out.println("ioexception: " + ioe.getmessage());         }     }      public void refreshserver() {          try          {             socket = serversocket.accept();              inputstreamreader inputstreamreader = new inputstreamreader(socket.getinputstream());             bufferedreader bufferedreader = new bufferedreader(inputstreamreader);             printwriter printwriter = new printwriter(socket.getoutputstream(),true);              system.out.println("socket read successful");             printwriter.println("send bye disconnect.");              string lineread = "";               boolean done = false;               while (((lineread = bufferedreader.readline()) != null) && (!done)){                 system.out.println("received client: " + lineread);                 printwriter.println("you sent: " + lineread);                 if (lineread.comparetoignorecase("bye") == 0) done = true;               }              system.out.println("closing connection");              socket.close();             bufferedreader.close();             inputstreamreader.close();             printwriter.close();         }          catch (unknownhostexception unhe)          {             system.out.println("unknownhostexception: " + unhe.getmessage());         }          catch (interruptedioexception intioe)         {             system.out                     .println("timeout while attempting establish socket connection.");         }          catch (ioexception ioe)          {             system.out.println("ioexception: " + ioe.getmessage());         }     }      public void nullify() {              try          {             socket.close();             serversocket.close();         }          catch (ioexception ioe)          {             system.out.println("ioexception: " + ioe.getmessage());         }     } }

and client...

//client  import java.io.*; import java.net.*; import java.util.*;  public class gpsclient {      public string lastmessage;     socket socket = null;      string serverurl;     int serverport;      public gpsclient() {         lastmessage = "";          serverport = 8189;         serverurl = "192.168.10.4";          try          {             socket = new socket(serverurl, serverport);             socket.setsotimeout(10000);         }          catch (unknownhostexception unhe)          {             system.out.println("unknownhostexception: " + unhe.getmessage());         }          catch (interruptedioexception intioe)          {             system.out.println("timeout while attempting establish socket connection.");         }          catch (ioexception ioe)          {             system.out.println("ioexception: " + ioe.getmessage());         }     }      public void retrievenew() {          try {             socket = new socket(serverurl, serverport);             socket.setsotimeout(10000);              lastmessage = "connected!";              inputstreamreader inputstreamreader = new inputstreamreader(socket.getinputstream());             bufferedreader bufferedreader = new bufferedreader(inputstreamreader);              printwriter printwriter = new printwriter(socket.getoutputstream(),true);             printwriter.println("request");              lastmessage = "request sent";  //          error when uncomment block, i.e. try read response server //          "timeout while attempting establish socket connection."  //          string lineread = ""; //          while ((lineread = bufferedreader.readline()) != null) { //              system.out.println("received server: " + lineread); //              lastmessage = "received server: " + lineread; //          }              lastmessage = "closing connection!";             bufferedreader.close();             inputstreamreader.close();             printwriter.close();             socket.close();          }          catch (unknownhostexception unhe)          {             system.out.println("unknownhostexception: " + unhe.getmessage());         }          catch (interruptedioexception intioe)          {             system.out.println("timeout while attempting establish socket connection.");         }          catch (ioexception ioe)          {             system.out.println("ioexception: " + ioe.getmessage());         }                   {             try              {                 socket.close();             }              catch (ioexception ioe)              {                 system.out.println("ioexception: " + ioe.getmessage());             }         }     }      public void nullify() {         try          {             printwriter printwriter = new printwriter(socket.getoutputstream(),true);             printwriter.println("bye");             printwriter.close();             socket.close();         }         catch (ioexception ioe)          {             system.out.println("ioexception: " + ioe.getmessage());         }     } }

thanks in advance!

josh

apart issues noted in comment, creating 2 sockets in client, , server written process 1 connection. writes first 1 , tries read it, meanwhile client writing second 1 , trying read that.

when fix hit deadlock, both sides trying read each other.

also shouldn't use printwriter or printstream on network, swallow exceptions need know about. use bufferedwriter.


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