package com.android.internal.telephony;

interface ITelephony {
 boolean endCall(); //통화 종료
 
 void answerRingingCall(); //수신중인 전화 받기
 
 void silenceRinger(); //벨소리를 묵음으로 하는듯
}

  TelephonyManager telephony = (TelephonyManager)
    context.getSystemService(Context.TELEPHONY_SERVICE); 
  try {
   Class c = Class.forName(telephony.getClass().getName());
   Method m = c.getDeclaredMethod("getITelephony");
   m.setAccessible(true);
   telephonyService = (ITelephony) m.invoke(telephony);
   telephonyService.endCall();
  } catch (Exception e) {
   e.printStackTrace();
  }