Building Android apps

Android is useless unless you market it well. There's not review process so you can put anything on the market. That being said, just create an app, and replicate it in different niches, hoping one picks up.

What I used to do when i didn't know how to code, was hang in the developer lounges and collect code that people post. You'd be suprised what people give away. Find code and think of a niche to use it. don't reinvint the wheel.