Hidden android navigation bar becomes visible when popup appears

[rakhthm]

I’m experiencing an issue with the .NET MAUI CommunityToolkit Popup on Android. My app uses immersive mode with the navigation bar hidden, but when a popup appears, the system navigation bar becomes visible and cannot be hidden. Could you provide guidance or a recommended approach for popups to correctly respect immersive mode and manage Android system bars while visible?

[rokmeglic71]

@rakhthm did you try this CoPilot suggestion?

Why it happens
Your main Activity has immersive mode flags set (e.g. SYSTEM_UI_FLAG_IMMERSIVE_STICKY, SYSTEM_UI_FLAG_HIDE_NAVIGATION).

When a Popup is displayed, the Toolkit creates a new DialogFragment with its own Window.

That dialog window doesn’t copy your immersive flags, so the system UI reappears.

⚙️ Workarounds / Approaches
1. Reapply immersive flags to the popup’s window
You can hook into the popup lifecycle and force the dialog window to respect immersive mode:

#if ANDROID
using Android.Views;
using CommunityToolkit.Maui.Views;

public class ImmersivePopup : Popup
{
    protected override void OnHandlerChanged()
    {
        base.OnHandlerChanged();

        if (Handler?.PlatformView is AndroidX.AppCompat.App.AppCompatDialog dialog)
        {
            dialog.Window?.DecorView?.SystemUiVisibility =
                (StatusBarVisibility)(
                    SystemUiFlags.ImmersiveSticky |
                    SystemUiFlags.HideNavigation |
                    SystemUiFlags.Fullscreen);
        }
    }
}
#endif

This ensures that when the popup appears, it reapplies the same flags as your main activity.

---

Does it help you going into the right way?