In this chapter, we started with an introduction of debugging tips for recovery and the updater. The same method can be used for other native applications as well. After that, we enhanced both recovery and the updater to support our customized system image, which can be used as a normal system image and also can be used to support a two stages boot. We also added features such as apply image from the VirtualBox shared folder and created partitions in recovery. Finally, we analyzed two famous open source update packages: Xpose and GApps. We can apply them to x86vbox devices without any problems.
We have concluded the entire book now. I hope as a system developer you can benefit from the concepts, hands-on practices, and source code in this book. If you can build and test the two devices, x86emu and x86vbox, in this book yourself, you should be able to get enough experience to start your own Android system...