how to use SystemUiFlags Enum

Question

Hi! Well I know it might be a bit silly but I really can't figure out how to use SystemUiFlags.HideNavigation;
I want my app to hide system navigation bar when the app enters fullscreen but I just don't get how to use it correctly. Originally I used (StatusBarVisibility)View.SystemUiFlagHideNavigation; but since it became deprecated I'd like to renew the code a bit. Can you help me out a little bit?

there's an article with the modern enum for doing this but I don't understand how to use it.

Answer 1

Hello,
Welcome to our Microsoft Q&A platform!

You can use SystemUiFlags like following code

var uiOptions =  
                SystemUiFlags.HideNavigation |  
                SystemUiFlags.LayoutHideNavigation |  
                SystemUiFlags.LayoutFullscreen |  
                SystemUiFlags.Fullscreen |  
                SystemUiFlags.LayoutStable |  
                SystemUiFlags.ImmersiveSticky;  
Window.DecorView.SystemUiVisibility = (StatusBarVisibility)uiOptions;  

I notice that systemUiVisibility is deprecated in Android R. You can use IWindowInsetsController.

 IWindowInsetsController insetsController = Window.InsetsController;  
 if (insetsController != null)  
  {  
    insetsController.Hide(WindowInsets.Type.NavigationBars());  
  }  

In addition, you can hide NavigationBar by Xamarin.Forms

NavigationPage.SetHasNavigationBar(this, false);  

For more information you can refer to :
https://learn.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/navigation/
https://learn.microsoft.com/en-us/dotnet/api/android.views.view.systemuiflaghidenavigation?view=xamarin-android-sdk-9
https://stackoverflow.com/questions/62577645/android-view-view-systemuivisibility-deprecated-what-is-the-replacement

Best Regards,
Wenyan Zhang

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