Hello, you need to create activity in the menu / Mapa. Maps_activity is already created but located elsewhere. How can I do this? You can help me? I am a beginner. This is not working, it writes a mistake. Thank you Juraj override fun onOptionsItemSelected(item: MenuItem?): Boolean { when(item.itemId) { R.id.Mapa -> { startActivity(Intent(this, activity_maps::class.java)) return true } } return false } }

You want to start your Maps activity? Try startActivity(Intent(this, MapsActivity.class)) (or whatever you named your activity)

Yes, ok

item seems to be nullable (hence the ? in MenuItem?) so the compiler complains that you are not checking for null.

ok,thanks

Try

startActivity(Intent(this, MapsActivity::class.java))

Its working,Kotlin :))