Android : Automatic SMS sender to multiple contacts Android App

I don't know if this has been already asked. But I searched here thoroughly before asking and I can't find any. So here goes.

I just started developing in Android using Java. And I find it tricky because there are lots of classes and methods I really don't know they do. And I'm kinda like of a person that learns lot thru examples(I just google what part I don't understand and some things links to next and so on and I can widen my vocabulary thru that ).

So since I just started developing in java. I want to learn how to send sms into multiple recipient. the user can choose who will receive the sms base on the users contact list and this one is automatic. more like sending a automatic goodnight or good morning on the list.

My problem is I cant find any samples or tuts about it. I did make a simple app that can send sms to single number, that is as far as I can go.

Anyone got a working app with source code that I state on the title. Can you kindly link it to me. Or anything that could help me solving my own self inflicted challenge. I'll really appreciate it.

Thanks in advance.