Book Image

Learning Embedded Android N Programming

By : Ivan Morgillo
Book Image

Learning Embedded Android N Programming

By: Ivan Morgillo

Overview of this book

Take a deep dive into the Android build system and its customization with Learning Embedded Android Programming, written to help you master the steep learning curve of working with embedded Android. Start by exploring the basics of Android OS, discover Google’s “repo” system, and discover how to retrieve AOSP source code. You'll then find out to set up the build environment and the first AOSP system. Next, learn how to customize the boot sequence with a new animation, and use an Android “kitchen” to “cook” your custom ROM. By the end of the book, you'll be able to build customized Android open source projects by developing your own set of features.
Table of Contents (15 chapters)
Learning Embedded Android N Programming
About the Authors
About the Reviewer

Android boot sequence

To fully understand all Android internals, we are going to learn how the whole boot sequence works: from the power-on to the actual Android system boot. The Android boot sequence is similar to any other embedded system based on Linux: in a very abstract way, after the power-on, the system initializes the hardware, loads the kernel, and finally the Android framework. Any Linux-based system undergoes a similar process during its boot sequence: your Ubuntu computer or even your home DSL router.

In the next sections, we are going to dive deeper in to these steps to fully comprehend the operating system we love so much.

Internal ROM – bios

When you press the power button on your device, the system loads a tiny amount of code, stored inside a ROM memory. You can think about this as an equivalent of the BIOS software you have in your PC. This software is in charge of setting up all the parameters for CPU clock and running the RAM memory check. After this, the system loads the...