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)

Extending recovery and the updater

After we have set up the debug environment for both recovery and the updater, we will extend both in this chapter to achieve the following goals:

  • Customized update package: We will create a single system image that can be used for a standard Android boot and a two stages boot.
  • Creating partitions: We introduced how to install x86vbox images to hard disk using NFS in Chapter 9, Booting Up x86vbox Using PXE/NFS. We will use recovery as a method to install x86vbox images in this chapter. To install x86vbox images on a blank hard disk, we need to add an option to allow the users to create partitions on the hard disk.
  • VBox shared folder: In order to access the x86vbox update images conveniently, we will enhance recovery to be able to use the VirtualBox shared folder to store update packages. Since the VirtualBox shared folder can be accessed from both the host and the device, the developers...