I am trying to get a better grip on Android's ConnectivityManager and how it really works under the hood. Using the API is simple enough but I am looking for something lower level such as when it starts and the dirty details of what its doing in the background. I can't seem to find a good resource about it. Everything is just about using the API.

Does anyone understand this or have any resources that they could point me to, website, book, white paper, or otherwise? I would really appreciate it.

Thanks