The LaunchMode = LaunchMode.SingleInstance adds an empty view with a navigationBar.
When I remove that line, it's fine.
[Activity( Theme = "@style/RebuyTheme", Label = "@string/app_name", LaunchMode = LaunchMode.SingleInstance, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation )]
But I need the singleInstance.
What I have to do, that the Activity is not shown like this. I only want to show the splashscreen (which is perfectly shown) and than directly the normal Forms page