android - Intents directory and how to use it

Question

Hello I'm a new to programming and I trying to find out how does intent defined its directory (how android knows what is the extras to put in it).

Answer 1

I strongly suggest you start here:

http://developer.android.com/training/index.html

(Specifically) http://developer.android.com/training/basics/firstapp/starting-activity.html

Or pick up "Beginning Android":

http://www.amazon.com/Beginning-Android-Experts-Voice-Source/dp/1430224193

Google offers a fantastic set of tutorials. You should use them :)