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)

Android emulator kernel and hardware

We use goldfish lights as an example to perform the calling sequence analysis from an application to the goldfish HAL. Now we can look at the kernel layer and the underlying hardware. We can also take an overview from the top to the bottom again to understand how the entire system works.

The goldfish architecture

We use the preceding figure to explain goldfish kernel and hardware in detail. As you can see, the preceding figure is similar to the architecture diagram that we saw in Chapter 1, Introduction to Android System Programming. This architecture diagram is the general architecture diagram for Android, but the preceding figure is specific to goldfish.

From the diagram, we can see the parts that we are interested in the goldfish kernel and emulator hardware. From the top to the bottom, the application utilizes the Android framework to implement functionalities and access...