I want to make an android app (idea inside), but I have NO coding knowledge?

[cutiepie]

My idea is: An android app that notifies you when certain people of your choice are online on any social networking site such as gmail chat and facebook. This app will just send a notification to your phone, and you can like set a little ringtone or something, or just a silent notification. You can select any people on either gmail chat or facebook, and tell the app to notify you when any of these people are online, and the app will say something like:
"Joe Schmoe is now online on facebook! -5:45pm" (obviously include the time because the person checking their phone might be checking it at a later time)

How do i program this? And do you think I should sell it for 99 cents? Thanks