Book Image

Android System Programming

By : Roger Ye, Shen Liu
Book Image

Android System Programming

By: Roger Ye, Shen Liu

Overview of this book

Android system programming involves both hardware and software knowledge to work on system level programming. The developers need to use various techniques to debug the different components in the target devices. With all the challenges, you usually have a deep learning curve to master relevant knowledge in this area. This book will not only give you the key knowledge you need to understand Android system programming, but will also prepare you as you get hands-on with projects and gain debugging skills that you can use in your future projects. You will start by exploring the basic setup of AOSP, and building and testing an emulator image. In the first project, you will learn how to customize and extend the Android emulator. Then you’ll move on to the real challenge—building your own Android system on VirtualBox. You’ll see how to debug the init process, resolve the bootloader issue, and enable various hardware interfaces. When you have a complete system, you will learn how to patch and upgrade it through recovery. Throughout the book, you will get to know useful tips on how to integrate and reuse existing open source projects such as LineageOS (CyanogenMod), Android-x86, Xposed, and GApps in your own system.
Table of Contents (15 chapters)

Summary

We have done all the analysis and implementation of recovery for the x86vbox device. We have analyzed the workflow and key elements in the recovery source code in the first part of this chapter. In the second part of this chapter, we applied the knowledge that we gained in the first part to the implementation of the recovery for the x86vbox device. We changed the x86vbox device itself to add the recovery support. We also changed recovery source code to fix the display issue. Finally, we modified newinstaller so that we can have a complete boot flow for both main system and recovery.

In the next chapter, we will discuss how to create a recovery package and explain what is inside a recovery package.