android - Place voice call, to have inapp feel (or just hide the default phone disconnected UI) -

currently when place voice phone call through app entire screen taken call ui. there way enclose call feel dialog , provide margin's user need not remember press app, after call complete ?

basically dont want customer need remember press "back" button.

i using code below place call. instead of opening last activity, opening first launch screen. need hide.

edit :

phonecalllistener phonelistener = new phonecalllistener(); telephonymanager telephonymanager = (telephonymanager)         .getsystemservice(context.telephony_service); telephonymanager.listen(phonelistener, phonecalllistener.listen_call_state);  intent intent = new intent(intent.action_call); intent.setdata(uri.parse("tel:" + cabbiephonenumber)); intent.setflags(intent.flag_activity_new_task); startactivity(intent); 

i using phonestatelistener listening phone state.

private class phonecalllistener extends phonestatelistener {     private boolean isphonecalling = false;     string log_tag = "logging 123";     @override     public void oncallstatechanged(int state, string incomingnumber) {         if (telephonymanager.call_state_ringing == state) {             // phone ringing             log.i(log_tag, "ringing, number: " + incomingnumber);         }         if (telephonymanager.call_state_offhook == state) {             // active             log.i(log_tag, "offhook");             isphonecalling = true;         }         if (telephonymanager.call_state_idle == state) {             // run when class initial , phone call ended,             // need detect flag call_state_offhook             log.i(log_tag, "idle");             if (isphonecalling) {                 log.i(log_tag, "restart app");                 // restart app                 intent = getbasecontext().getpackagemanager().getlaunchintentforpackage(                         getbasecontext().getpackagename());                 i.addflags(intent.flag_activity_clear_top);                 startactivity(i);                 isphonecalling = false;             }         }     } 

voice call without built-in call ui not possible sdk application. have roll own firmware achieve this.