In this chapter, we have learned lots of very important things that represent the basis of Android.
We started with the Android philosophy regarding the licenses and the development model touching on different versions of Android that followed. We have learned to install and use the tools necessary to contribute to the AOSP project, and also how to download a copy of the AOSP source code, selecting the right TAG to get the wanted version of Android.
In the next chapter, we will make the first build, generating an image for the emulator, but first we will explain how the Android build system works and what tools we need to install.
