override fun onStart() { super.onStart() hideSystemUI() } fun hideSystemUI() { window.decorView.systemUiVisibility = (View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY or View.SYSTEM_UI_FLAG_FULLSCREEN or View.SYSTEM_UI_FLAG_HIDE_NAVIGATION or View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN) } override fun onWindowFocusChanged(hasFocus: Boolean) { super.onWindowFocusChanged(hasFocus)

