android - In Qt socket write data is not reaching the server -



android - In Qt socket write data is not reaching the server -

writing simple application communicate android device pc qt application.

on initial startup of app, succesfully able connect android app.

my signals:

connect(socket, signal(connected()),this, slot(connected())); connect(socket, signal(readyread()),this, slot(readyread())); void myapp::connected() { qdebug() << "connected..."; socket->write("init connection \n"); socket->flush(); } void myapp::readyread() { qstring readdata; qdebug() << "reading..."; while(socket->bytesavailable()) readdata= socket->readall(); qdebug()<<"read finished"; if(socket->iswritable()) { qdebug()<<"yes writable"; socket->write("new data"); socket->flush(); } else qdebug()<<"no writable"; }

in connected method socket->write successful , android app able read info in readyread, socket->write returning number of bytes written not reaching android app.

note: on application close or socket close, info read @ server end running in android app.

tell me if more info required.

edit:

1.android app running on tablet , qt pc app. both running on same network (intranet).

2.created qtcpscoket in single program.

3.created serversocket on android app , on socket>connecttohost(server_ip,portno,qiodevice::readwrite); @ qt app onconnected method called.subsequently socket->write("init connection \n"); read @ android app.

i can't leave comments, i'll write here. can utilize qiodevice function bool qiodevice::waitforbyteswritten(int msecs) [virtual] instead of bool flush(). if pc application stops problem in writing info in sec time. or can check value returned function flush().

android c++ qt sockets

Comments

Post a Comment

Popular posts from this blog

Delphi change the assembly code of a running process -

Delphi change the assembly code of a running process - i'm trying alter address 00741fa5 has push test.009e721c . alter push test.009e71c8 . procedure callback; asm force $9e71c8 end; procedure tform2.btn1click(sender: tobject); var ppid :dword; pprocess : cardinal; begin getwindowthreadprocessid(findwindow(nil,pchar('test')), @ppid); pprocess := openprocess(process_all_access, false, ppid); injectasm(pprocess, $741fa5, 10, integer(@callback), 0); end; here injectasm function (with error checking) function injectasm(process: longword; injectaddress, injectsize, codeaddress, codesize : integer): pointer; var csize, rsize : integer; replaced : array of byte; jmp : array [0..4] of byte; jmpaddress : integer; nopv : byte; : integer; nbr: ulong_ptr; begin //injectsize must equal or greater 5, because need space our //(far) jmp wwxxyyzz instruction //if there's no space, inject in place of few instructions if injectsize ...
Read more

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) -

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) - hello have problem hibernate , jackson. have 2 pojos @entity @table(name = "users") public class user implements serializable { static final long serialversionuid = 4235637833262722256l; @id @generatedvalue private int id; @column(name = "creation_date") private date creationdate; @column(name = "first_name") private string firstname; @column(name = "last_name") private string lastname; @version @column(name = "version") private int version; @column(name = "e_mail") private string email; @column(name = "enabled") private boolean enabled; @column(name = "login") private string login; @column(name = "password") private string password; @jsonmanagedreference("role") @onetomany(mappedby = "user", cascade = cascadetype.all,fetch = fetchtyp...
Read more

C++ 11 "class" keyword -

C++ 11 "class" keyword - i've started using c++ 11 little bit more , have few questions on special uses of class keyword. know it's used declare class, there's 2 instances have seen don't understand: method<class t>(); and class class_name *var; why precede typename keyword class in first example, , keyword pointer in sec example? that known elaborated type specifier , necessary when class name "shadowed" or "hidden" , need explicit. class t { }; // love of god don't t t; t t2; if compiler smart, give these warnings: main.cpp:15:5: error: must utilize 'class' tag refer type 't' in scope t t2; ^ class main.cpp:14:7: note: class 't' hidden non-type declaration of 't' here t t; ^ if class not defined, deed forwards declaration. for example: template <typename t> void method() { using type = typename t::value_type; } method...
Read more