Inside the Android OS: Building, Customizing, Managing and Operating Android System Services
- Length: 272 pages
- Edition: 1
- Language: English
- Publisher: Addison-Wesley Professional
- Publication Date: 2021-08-10
- ISBN-10: 0134096347
- ISBN-13: 9780134096346
- Sales Rank: #482068 (See Top 100 Books)
The Complete Guide to Customizing Android for New IoT and Embedded Devices
Inside the Android OS is a comprehensive guide and reference for technical professionals who want to customize and integrate Android into embedded devices, and construct or maintain successful Android-based products. Replete with code examples, it encourages you to create your own working code as you read–whether for personal insight or a professional project in the fast-growing marketplace for smart IoT devices.
>Expert Android developers G. Blake Meike and Larry Schiefer respond to the real-world needs of embedded and IoT developers moving to Android. After presenting an accessible introduction to the Android environment, they guide you through boot, subsystem startup, hardware interfaces, and application support–offering essential knowledge without ever becoming obscure or overly specialized.
Reflecting Android’s continuing evolution, Meike and Schiefer help you take advantage of relevant innovations, from the ART application runtime environment to Project Treble. Throughout, a book-length project covers all you need to start implementing your own custom Android devices, one step at a time.
You will:
- Assess advantages and tradeoffs using Android in smart IoT devices
- Master practical processes for customizing Android
- Set up a build platform, download the AOSP source, and build an Android image
- Explore Android’s components, architecture, source code, and development tools
- Understand essential kernel modules that are unique to Android
- Use Android’s extensive security infrastructure to protect devices and users
- Walk through Android boot, from power-on through system initialization
- Explore subsystem startup, and use Zygote containers to control application processes
- Interface with hardware through Android’s Hardware Abstraction Layer (HAL)
- Provide access to Java programs via Java Native Interface (JNI)
- Gain new flexibility by using binderized HAL (Project Treble)
- Implement native C/C++ or Java client apps without bundling vendor libraries
Cover Page
About This eBook
Halftitle Page
Title Page
Copyright Page
Dedication Page
Contents at a Glance
Contents
Preface
Example Code
Register Your Book
Acknowledgments
About the Authors
1. Why Android?
Adopting Android
AOSP and Google
Other Choices
Summary
2. Booting Acme
Setting Up a Build Machine
Downloading the Code
Repo
Forking the Source
Repository Commit Pinning
Example: Local Mirror of Forked Repositories
Building an Image
Device Tools
Flashing the Device
Summary
3. Getting Started
Putting Android in Its Place
The Android Service Model
Exploring the Source
Summary
4. The Kernel
The Linux Kernel
The Android Kernel
Building a Kernel
Summary
5. Platform Security
Types of Security
Verified Boot
Operational Security
User Protections
Customizing Permissions
Summary
6. System Startup: Installing and Booting the System
The Boot Process
Recovery
Building a Daemon
Creating the Acme Device
Repo Again
Starting the Daemon
Summary
7. Android Startup: Dalvik and Zygote
Dalvik
ART
Zygote
Summary
Citations
8. Getting to Android: The HAL
Why a HAL?
Is a HAL Necessary?
Designing the HAL
Building a HAL
Summary
9. Getting to Java: The JNI
Code Structure
Using the Device
Using the HAL
Using the Java Native Interface
Summary
10. Project Treble: Binderized HAL
HIDL Architecture
Hardware Interface Definition Language (HIDL)
HIDL Services
HIDL Clients
Summary
11. Creating a Custom Binderized HAL
Acme Custom HIDL
Summary
12. Clients for a Custom Binderized HAL
Native C++ Aproximity Client
Java/Kotlin Aproximity Client
Summary
Index
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