Starting device when connected to power

Hello,

I have a question regarding the behavior of a device if it is turned off and then is plugged into power. I want the device to turn on after power plugged in.

But I really don't know where to start. I even can't figure out what part of the system (hardware/software) would be responsible for this kind of actions. There must be some event since some devices show 'charging animations'.

The device I am currently working with is a rooted Galaxy Nexus.

Even if you are not sure, currently every guess would help me to investigate further!

Thanks, Mark