I'd like to know if I have more than one activity, how can I choose that activity use when the app starts... or it's always the Main activity? (besides the service starting at boot)
It is always Main but you can use main just as a "starter" (no layout or better an transparent one) and here you decide what to show then you directly forward to the activity you want...
Havnt tried this but should be a way. Just my 2 cent