hide status bar android

Question

So I feel kinda dumb asking this but I really am confused right now. I need to hide the status bar when video goes fullscreen but I keep getting

CS0120 An object reference is required for the non-static field, method, or property 'Activity.Window'

I tried making an instance of Activity class but that throws NullReferenceException.

 public class MainActivity : AppCompatActivity, BottomNavigationView.IOnNavigationItemSelectedListener
    {
        WebView web_view;



        public class HelloWebViewClient : WebViewClient
        {
            public override bool ShouldOverrideUrlLoading(WebView view, string url)
            {
                view.LoadUrl(url);
                return false;
            }
        }


        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            SupportActionBar.Hide();
            SetContentView(Resource.Layout.activity_main);

            var relativeLayout = FindViewById<RelativeLayout>(Resource.Id.container);
            var relativeLayoutTwo = FindViewById<RelativeLayout>(Resource.Id.containerTwo);
            web_view = FindViewById<WebView>(Resource.Id.webview);
            web_view.Settings.JavaScriptEnabled = true;
            web_view.SetWebChromeClient(new FullScreenClient(relativeLayout, relativeLayoutTwo));




            BottomNavigationView navigation = FindViewById<BottomNavigationView>(Resource.Id.navigation);
            navigation.SetOnNavigationItemSelectedListener(this);
        }

        public class FullScreenClient : WebChromeClient
        {
            readonly FrameLayout.LayoutParams matchParentLayout = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MatchParent,
                                                                                                             ViewGroup.LayoutParams.MatchParent);
            readonly ViewGroup content;
            readonly ViewGroup parent;
            View customView;

            public FullScreenClient(ViewGroup parent, ViewGroup content)
            {
                this.parent = parent;
                this.content = content;
            }

            public override void OnShowCustomView(View view, ICustomViewCallback callback)
            {
                customView = view;
                view.LayoutParameters = matchParentLayout;
                parent.AddView(view);
                content.Visibility = ViewStates.Gone;
                **Activity.Window.ClearFlags(WindowManagerFlags.Fullscreen);**
            }

            public override void OnHideCustomView()
            {
                content.Visibility = ViewStates.Visible;
                parent.RemoveView(customView);
                customView = null;

            }
        }

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

Add following code to your OnCreate method.

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

Best Regards,

Leon Lu

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