android - Error while trying registering with pjsip: PJSIP_EUNSUPTRANSPORT -

i'm developing sip client based on pjsip on android (i'm using csipsimple code reference now).

when try register account following error:

unable generate suitable contact header registration: unsupported transport (pjsip_eunsuptransport)

my code same in here sipserver string ip address of registrar "192.168...."

i have tried not specify transport method in following code:

        int[] accid = new int[1];          accid[0] = 1;          pjsua_acc_config cfg = new pjsua_acc_config();         pjsua.acc_config_default(cfg);         csipsimple_acc_config css_cfg = new csipsimple_acc_config();         pjsua.csipsimple_acc_config_default(css_cfg);         cfg.setpriority(10);         cfg.setid(pjsua.pj_str_copy("sip:" + sipuser + "@" + sipserver));         cfg.setreg_uri(pjsua.pj_str_copy("sip:" + sipserver));          cfg.setreg_timeout(60);         cfg.setcred_count(1);          cfg.setpublish_enabled(0);         cfg.setreg_delay_before_refresh(-1);          cfg.setuse_timer(pjsua_sip_timer_use.pjsua_sip_timer_optional);         pjsua.csipsimple_set_acc_user_data(cfg, css_cfg);         status = pjsua.acc_add(cfg, pjsuaconstants.pj_false, accid); 

the error is:

e/libpjsip(20934): pjsua_acc.c ..unable generate suitable contact header registration: unsupported transport (pjsip_eunsuptransport) [status=171060]

of course after there no trace on wireshark: lib gives before sending data.

thanks

i had add following code:

    int[] tid = new int[1];     int status;     pjsua.transport_config_default(cfgtrasport);     cfgtrasport.setport(5060);     status = pjsua.transport_create(pjsip_transport_type_e.pjsip_transport_udp, cfgtrasport, tid);     if (status != pjsuaconstants.pj_success) {         log.e("pjsua.transport_create returned status="+status);     }