Android : call in background in android without caller screen not working on 4.3 Kitkat

I tried to call in background in my app on button click but it is not working on android 4.3 . I dont want any caller screen just my application activity should be shown when call to a phone is done in background.

Code is given below...

*try {
                    Intent callIntent = new Intent(Intent.ACTION_CALL);
                    callIntent.setData(Uri.parse("tel:" + "8800806074"));
                    startActivity(callIntent);
                } catch (ActivityNotFoundException e) {
                    e.printStackTrace();
                }
                Handler handler = new Handler();
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        telephonyManager.listen(phoneListener,
                                PhoneStateListener.LISTEN_CALL_STATE);
                    }
                }, 10000);*

.............

private class PhoneCallListener extends PhoneStateListener {

    boolean flag = true;

    String LOG_TAG = "Call TEST";

    @Override
    public void onCallStateChanged(int state, String incomingNumber) {

        if (TelephonyManager.CALL_STATE_RINGING == state) {

            Log.i(LOG_TAG, "number: " + incomingNumber);

        }

        if (TelephonyManager.CALL_STATE_OFFHOOK == state) {

            Log.i(LOG_TAG, "OFFHOOK");

            // invoking activity
            if (flag) {
               Intent i = getBaseContext().getPackageManager()
                        .getLaunchIntentForPackage(
                                getBaseContext().getPackageName());
                i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(i);
                System.out.println("flagged retrieving app");

                flag = false;

            }

        }

        if (TelephonyManager.CALL_STATE_IDLE == state) {

            Log.i(LOG_TAG, "IDLE");

            Log.i(LOG_TAG, "restart app");


        }
    }
}