Android home key disable? block question.

If one activity is carried out, I want to prevent homekey event.

First, we found ways to detect home key events using the onUserLeaveHint method and how to detect them by broadcast.

First, the onUserLeaveHint method was implemented by terminating the activity and calling it again, and the activity is turned on again after 5 seconds. I looked up the reason and they said, "Android 5 second rule?" The onUserLeaveHint method was not implemented when another application was turned on in 5 seconds.

    protected void onUserLeaveHint() {

        //Detect here
        Log.d("gg", "Home Button Touch");
        finish();

        Intent intent = new Intent(this, ShowActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);
        super.onUserLeaveHint();
    }

The code implemented by the broadcast receiver is http://stackoverflow.com/questions/8881951/detect-home-button-press-in-android I saw it here, but there was no way to stop it.

Lockdown apps are implementing this function, so there must be a way, but it's not coming out