Activity(s) OR Layout(s)

[AndroidDoge]

Hi everyone,
(please excuse my horrible posting skills no clue how this works its my first time)

I am creating a certain app which will atleast 6 different screens...
I don't know whether to use one activity with many layouts or make each different screen an activity..
Alot of the screens will have one to five buttons which will preform different functions or tasks like either switching to different screens or sharing information to other apps etc....

Thanks
Kind regards
-Matt