android - Coming back to an Activity after making a phone call -

i want make phone call , after call ends want come activity started call.

code start call :

// start call intent callintent = new intent(intent.action_call); callintent.setdata(uri.parse("tel:" + phonenumber)); startactivity(callintent); 

code handle coming activity :

// monitor phone call activities private class phonecalllistener extends phonestatelistener {      private boolean isphonecalling = false;      string tag = "phonecalllistener";      @override     public void oncallstatechanged(int state, string incomingnumber) {          // if call ringing         if (state == telephonymanager.call_state_ringing) {              log.d(tag, "call ringing, number : " + incomingnumber);         }         // else if call active         else if (state == telephonymanager.call_state_offhook) {              log.d(tag, "call active");              isphonecalling = true;         }         // else if call idle         else if (state == telephonymanager.call_state_idle) {              log.d(tag, "call idle");              if (isphonecalling) {                  isphonecalling = false;                  // finish native call application come                 // activity                 intent = new intent(getintent());                 i.setflags(intent.flag_activity_single_top);                 startactivity(i);             }          }     } }  

using finish() not work. stays on call application.

how come activity started phone call?