setting android button invisible but still having an onClick Listener attached

Question

So currently I\'m putting an Easter egg inside my app and I want the Button to be invisible, but when clicked(Rick roll). So far I can make it work when I say:

Answer 1

You can also disable the button (It will not be clickable).

In java code:

btn.setClickable(false);

In .xml layout:

android:clickable="false"