Android : Passing an instance of GoogleMap to another activity and keeping location + zoom

I'm having a bit of a problem. I have an activity with a MapView fragment, I would like to launch another Activity but keep the map as is (position, zoom, bearing, tilt...). I have 2 questions:

1. 
   

   Should I use a Singleton for the map and use the same instance of it on every activity I need. Would that work?

   
   


2. 
   

   To be more precise, I have a MainActivity, the splash screen, that has a map in the background. When the user goes to Login Screen, I create a new activity but I would like to keep the map in the background. Do you HAVE to launch a new activity to go from one screen/view to another?

   
   

Thanks!