How to hide initial/default activity until layout loads

When my app first starts, an activity with the Titlebar showing my app's name and a black body is very briefly displayed, then the layout I am loading in the Activity_Create is displayed.

How can I prevent this unknown initial/default activity from displaying before my actual desired layout is loaded?

I even have the below in the "Main" activity:

Code:

  #Region  Activity Attributes
#FullScreen: false
#IncludeTitle: False
#End Region  

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