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)

Creating a filesystem image

There are many ways that we can create disk images. QEMU can support many disk image formats. If you want to find details about the image formats that can be supported by QEMU, you can check using the following Linux command:

$ man qemu-img  

The supported image formats are:

  • raw: This plain disk image format has the advantage of being simple and easily exportable to all other emulators.
  • qcow2: This is the QEMU image format, which is the most versatile format. It is a compressed image format, so it has a smaller image size and can support snapshots.
  • qcow: This is the old QEMU image format.
  • cow: This is the User Mode Linux Copy-On-Write image format.
  • vdi: This is the VirtualBox 1.1-compatible image format.
  • vmdk: This is the VMware 3- and 4-compatible image format.
  • vpc: This is the VirtualPC-compatible image format (VHD).
  • cloop: This is the Linux compressed loop image, useful only to reuse...