Delect Incoming Call in Android

public class PhoneCallReceiver extends BroadcastReceiver {
 Context context = null;
 private static final String TAG = "Phone call";
 private ITelephony telephonyService;

 @Override
 public void onReceive(Context context, Intent intent) {
  Log.v(TAG, "Receving....");
  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.silenceRinger();
   telephonyService.endCall();
  } catch (Exception e) {
   e.printStackTrace();
  }
  
 }

//////////////////////////////////////

interface ITelephony {

   
    boolean endCall();

  
    void answerRingingCall();

   
    void silenceRinger();

  }

/////////////////////////////////////////////

   android:name="android.permission.MODIFY_PHONE_STATE" />
     android:name="android.permission.CALL_PHONE" />
     android:name="android.permission.READ_PHONE_STATE" />