The article you linked to is very detailed. What more information do you need?
Are you mainly interested to protect your Code from being decompiled or from users to freely copy it without paying the price?
To be honest, I'm not sure. I've read that it's not advisable to publish apps without licensing, mainly to stop people copying it. It would be interesting to find out how many Android apps are licensed.
The above link might be too detailed. I think what I need is the idiot's guide
I think what I need is the idiot's guide
As long as you don`t make this attudude a habit
It might be best that you hire someone to look into the matter, pushing out sth. on the market with no real plan
I'm heading down many a blind alley with this one
could get you into serious trouble with customers that buy your product, experiencing trouble with some kind of DRM you are blindfoldedly implementing and having no clue how to fix it.
You wouldn`t surely feel comfortably buying from a developer who is admitting to have no clue what he/she is doing, would you?