java - App connects to the server but can not communicate -

i apologize in advance bad english

the app able connect server java, hangs @ time of exchange of data.

this client android code:

@suppresslint("newapi") public class connection extends intentservice{  private string tag = "ciclo eventi"; private string user; private string pass;  public connection() {     super("connection"); }  public void oncreate(){     super.oncreate();     strictmode.threadpolicy policy = new strictmode.threadpolicy.builder().permitall().build();     strictmode.setthreadpolicy(policy); }  public void onstart(intent intent, int startid){      log.d(tag, "getdata");     bundle extras = intent.getextras();     user = (string) extras.get("user");     pass = (string) extras.get("password");     log.d(tag, user);     log.d(tag, pass);     onhandleintent(intent); }  public int onstartcommand(intent intent, int flags, int startid){     onhandleintent(intent);     return start_not_sticky; }    @override public void ondestroy() {     log.d(tag, "connection closed");  }  @override protected void onhandleintent(intent intent) {     socket s=null;     bufferedreader in=null;     printwriter  writer=null;     try {         log.d(tag, "try connect");         s = getconnection("192.168.1.103", 5433);         log.d(tag, "connection done");         in = new bufferedreader(new inputstreamreader(s.getinputstream()));         writer = new printwriter(s.getoutputstream(), true);         writer.println(user);         writer.println(pass);         log.d(tag, "i've send credential");         string resp = null;         resp = in.readline();         log.d(tag, "receive results");         if(resp.equals("done")){             log.d(tag, "accept");             /*intent i=new intent(this,secondactivity.class);             startactivity(i);*/             ondestroy();         }         else{             log.d(tag, "refused");         }     } catch (ioexception e) {         // todo auto-generated catch block         e.printstacktrace();     }   }  protected socket getconnection(string ip, int port) throws ioexception  {     try {         keystore truststore = keystore.getinstance("bks");         inputstream truststorestream = getapplicationcontext().getresources().openrawresource(r.raw.server);         truststore.load(truststorestream, "keypass".tochararray());          trustmanagerfactory trustmanagerfactory = trustmanagerfactory.getinstance(keymanagerfactory.getdefaultalgorithm());         trustmanagerfactory.init(truststore);          sslcontext sslcontext = sslcontext.getinstance("tls");         sslcontext.init(null, trustmanagerfactory.gettrustmanagers(), null);         sslsocketfactory factory = sslcontext.getsocketfactory();         sslsocket socket = (sslsocket) factory.createsocket(ip, port);         //socket.setenabledciphersuites(getciphersuiteswhitelist(socket.getenabledciphersuites()));         return socket;     } catch (generalsecurityexception e) {         log.e(this.getclass().tostring(), "exception while creating context: ", e);         throw new ioexception("could not connect ssl server", e);     } }       public static string[] getciphersuiteswhitelist(string[] ciphersuites) {         list<string> whitelist = new arraylist<>();         list<string> rejected = new arraylist<>();         (string suite : ciphersuites) {             string s = suite.tolowercase();             if (s.contains("anon") || //reject no anonymous                     s.contains("export") || //reject no export                     s.contains("null") || //reject no encryption                     s.contains("md5") || //reject md5 (weaknesses)                     s.contains("_des") || //reject des (key size small)                     s.contains("krb5") || //reject kerberos: unlikely used                     s.contains("ssl") || //reject ssl (only tls)                     s.contains("empty")) {    //not sure 1                 rejected.add(suite);             } else {                 whitelist.add(suite);             }         }         return whitelist.toarray(new string[whitelist.size()]);     }} 

i need service because need syncronous thread

this java server code:

public class socketthread implements runnable{ private socket s1; private bufferedreader in; private printwriter out; private string user = "admin"; private string pass = "ciao";  socketthread(socket s){     this.s1=s; }  public void run(){     boolean logindone = false;     string user1 = null;     string password1 = null;     string lati = null;     string longi = null;     string via = null;     system.out.println("connected");     try {         in = new bufferedreader(new inputstreamreader(s1.getinputstream()));         out = new printwriter(s1.getoutputstream(), true);         user1 = in.readline();         password1 = in.readline();         system.out.println("user : "+user1+" password : "+ password1);     } catch (ioexception e) {         // todo auto-generated catch block         system.out.println("error on buffer creation");         e.printstacktrace();     }     system.out.println("access done, wait check credential");     do{     if(user1.compareto(user)==0 && password1.compareto(pass)==0){         logindone = true;         out.println("done");      }     else{         out.println("noaccess");      }     }while(logindone == false);     system.out.println("login done");     try {         system.out.println("close done");         s1.close();         in.close();         out.close();     } catch (ioexception e) {         // todo auto-generated catch block         e.printstacktrace();     }      system.out.println("thread off"); }} 

both server , client crashes no message error when exchanging data (both input , output)

the network ok, privileges of android app .internet, .access_wifi_state, .access_network_state

the server works java desktop client.

thank much!

try using volley

https://developer.android.com/training/volley/index.html

you can use custom requests volley.

https://developer.android.com/training/volley/index.html