Ummm...no. You were able to tie an IP address to a MAC address. A MAC address does not equal a person. Especially in the case of a wifi router being the MAC address you found, you have no idea who might have actually been directing the offending internet traffic.
(Note: I'm the person who posted the first response too, but I wasn't logged in then so it came out as from anonymount).
If you want to do some custom drawing, then sure, you can start with a View and extend it to make your own Widget.
You can draw without a View, but only on bitmaps. Canvases from the screen come from Views. If you have a Drawable and you want it to appear on the screen, then the easiest way is to create any view you want and just make the background be that Drawable. This can all be done in XML in your layout resource file and it doesn't take a single line of Java code. It's very easy once you're used to it.
When I started out my biggest confusion was Activities, Apps, and Tasks. Those really mixed me up. But once I got used to them I found them very nice, it makes it easy to build modular apps that work together smoothly.
The Rocketboost system at best buy is a wireless solution that will work for you: http://www.bestbuy.com/rocketboost gives a good summary of how it works.
You can add speakers and audio sources around your house, and the speakers have a "next source" button that lets you flip between your audio sources. It is modular, where you can buy as many units as you need and they all join together into one big network in your house. It isn't super-cheap, but it is cheaper than other products that are equally as flexible in how you set them up.
Disclaimer: I worked on this product (wrote the protocol stack for moving the audio data over the air), so you may want to take my recommendation with a grain of salt, but I am happy with how well the product turned out and I think it's pretty neat.