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

I know this is a stretch, but here's an answer with coroutines if you happen to use them:

    lifecycleScope.launch {
        delay(3000)
        header.visibility = View.GONE
    }