Setting up Nexus 7

I have downloaded and set Android Studio up, now I have to decide against which target I want to run the applications that I develop. Actually, we are not forced to use a real device, we could also using an emulation. Still, having at hand a Nexus seven, it looks kind of a good idea to use it.

To be allowed to use Nexus 7 as a developer tool, you need to activate the developer options.

In the settings page, look in the system section, and click on the "about tablet" item.
Tap seven times (I'm not kidding) on "build number" and ... now you are a developer!

That means that when you go back to settings page, you can see in the system section he Developer options. Click on that item, you enter the Developer options page, where you find, in the Debugging section, the USB debugging option, that you should activate.

Now, if you run the command

adb devices

You should see that "something" is available.

Back to Android Studio, once you are in a project, you can open the Run menu, where you'll see the Edit Configuration... item, clicking on which, you will also be able to determine the target device. You can choose an Emulation (you have to specify which device you want to emulate) or you can specify that you want to use an USB device.