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)

Building and testing

We have made all the code changes to enable Houdini now. We can build the system image using the following commands:

$ source build/
$ lunch x86emu_x86-eng
$ m -j4

After we build the system image, we can test it. Of course, we can test the images using any Android application that can run on the ARM architecture. However, in order to get details about the test targets, we will use two unit test applications to verify our work in this chapter. The first one is a standalone ARM application that can be run from the command line. The second one is an Android application with a JNI shared library for ARM only. The Android emulator images and test binaries in this chapter can be downloaded from

The source code for these two test applications is hosted on GitHub. You can get the source code...