<How to hide status &amp; navigation bars DURING p...

# stackoverflow

[user]

How to hide status &amp; navigation bars DURING popup menu? [Kotlin]
This is my progress so far. The problem with this is that the status bar flashes briefly when the menu starts, and the navigation bar stays present during the menu and selection.
Is anyone aware of how to make a popup menu display in a fullscreen application without the system bars ever showing?
class MainActivity : AppCompatActivity() {
lateinit var popup2:View
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)...