Android Question MY MAPS


Licensed User
Good morning;
someone could help me with the following:
Need from an application that I'm doing, you can insert waypoints in a given layer and MyMaps map (google maps) and not well where to approach it; I'm a bit lost with so much information.
I know that from the same application (my maps) on the phone, or with some other of google play could do something similar, but I have to do it in code to collect coordinates the program also added'm getting fields in a database, and forwarding information to others GPS sites.

Thank you very much (just to have a little idea of how to do it, I know that follow only)