How to show a view for 3 seconds, and then hide it?

Question

I tried with threads, but android throws \"CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.\".

So how can

Answer 1

Without the need to have a reference to a view or sleep a thread:

    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            // do stuff
        }
    }, 3000);