Make an activity full screen?

Question

I'm struggling with making an activity fullscreen and I've gotten this so far:

    if(Build.VERSION.SDK_INT < 30) {
        View decorView = getWindow().getDecorView();
        int uiOptions = decorView.getSystemUiVisibility();
        int newUiOptions = uiOptions;
        newUiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
        newUiOptions |= View.SYSTEM_UI_FLAG_FULLSCREEN;
        newUiOptions |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
        newUiOptions |= View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
        newUiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE;
        newUiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
        decorView.setSystemUiVisibility(newUiOptions);
    } else {
        getWindow().setDecorFitsSystemWindows(false);
        WindowInsetsController controller = getWindow().getInsetsController();
        if (controller != null) {
            controller.hide(WindowInsets.Type.statusBars() | WindowInsets.Type.navigationBars());
            controller.setSystemBarsBehavior(WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE);
        }
    }

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
        getWindow().getAttributes().layoutInDisplayCutoutMode =
                WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES; }

It works on android 11 but on 10 I'm still getting black navigation and notification bars.