We have already worked with the Android SDK Manager while setting up emulators in Chapter 1, Installing and Setting Up Xamarin Studio. At this point, we'll just review the tools in the SDK Manager that we'll be using as Xamarin.Android developers. There are three components you will use on a regular basis, including the Package Manager, the Add-On Sites Manager, and the AVD Manager. The following screenshot shows the package manager:

The package manager lets you download and install APIs, tools, documentation, emulator components, as well as other libraries. You can also delete unused or outdated components using this tool as you see fit. Try to avoid the temptation to just download everything at the first sitting though. Some of these components are very large so it's best to pick and choose as you need them.

In the following screenshot, you can see the Add-on Sites Manager:

The Add-on Sites Manager lets you select both approved and user-defined third-party sites that...