I would like to know if it is possible to open a new Activity(at least, the view of the activity) in small inside another Activity as whatsApp does when it sends the position.
When you click on “send position”, the current activity opens a new one where a map appears in small.
Thanks.
Sure, yes. For example, that’s what happens when one of your activities takes a camera picture, or uses a map. It can just as easily be one of your own, custom activities that you invoke. You can, of course, set the size to be whatever you’d like.
Here’s a good example, illustrating what the author calls “sub-Activities”:
http://developerlife.com/tutorials/?p=302