Inside the Android OS: Building, Customizing, Managing and Operating Android System Services

266 Pages·2021·4.676 MB·English

by  G. Meike, Lawrence Schiefer

Inside the
AndroidTM OS
9780134096346_print.indb 1 25/06/21 6:27 PM
Android™ Deep Dive Series
Visit informit.com/android for a complete list of available publications.
The Android™ Deep Dive Series is for intermediate and expert
developers who use Android Studio and Java, but do not have
comprehensive knowledge of Android APIs and want to bolster their
knowledge of fundamentally important topics.
Each book in the series stands alone and provides idioms, frameworks,
and engineering approaches. They provide in-depth information, correct
patterns and idioms, and ways of avoiding bugs and other problems.
Make sure to connect with us!
informit.com/socialconnect
Android_DeepDive_7x9.indd 1 5/21/2021 3:45:50 PM
9780134096346_print.indb 2 25/06/21 6:27 PM
Android™ Deep Dive Series
Inside the
AndroidTM OS
Visit informit.com/android for a complete list of available publications.
Building, Customizing,
The Android™ Deep Dive Series is for intermediate and expert
developers who use Android Studio and Java, but do not have
comprehensive knowledge of Android APIs and want to bolster their Managing and Operating
knowledge of fundamentally important topics.
Android System Services
Each book in the series stands alone and provides idioms, frameworks,
and engineering approaches. They provide in-depth information, correct
patterns and idioms, and ways of avoiding bugs and other problems.
G. Blake Meike
Larry Schiefer
Boston • Columbus • New York • San Francisco • Amsterdam • Cape Town
Dubai • London • Madrid • Milan • Munich • Paris • Montreal • Toronto • Delhi • Mexico City
São Paulo • Sydney • Hong Kong • Seoul • Singapore • Taipei • Tokyo
Make sure to connect with us!
informit.com/socialconnect
Android_DeepDive_7x9.indd 1 5/21/2021 3:45:50 PM
9780134096346_print.indb 3 25/06/21 6:27 PM
Many of the designations used by manufacturers and sellers to distinguish their products Editor-in-Chief
are claimed as trademarks. Where those designations appear in this book, and the Mark Taub
publisher was aware of a trademark claim, the designations have been printed with initial
Acquisitions Editor
capital letters or in all capitals.
Malobika
Android is a trademark of Google, Inc. Chakraborty
Development Editor
The authors and publisher have taken care in the preparation of this book, but make no
expressed or implied warranty of any kind and assume no responsibility for errors or Sheri Replin
omissions. No liability is assumed for incidental or consequential damages in connection Managing Editor
with or arising out of the use of the information or programs contained herein. Sandra Schroeder
For information about buying this title in bulk quantities, or for special sales opportunities Senior Project Editor
(which may include electronic versions; custom cover designs; and content particular to Lori Lyons
your business, training goals, marketing focus, or branding interests), please contact our
Copy Editor
corporate sales department at [email protected] or [phone].
Paula Lowell
For government sales inquiries, please contact [email protected].  Production Manager
For questions about sales outside the U.S., please contact [email protected].  Aswini Kumar/
codeMantra
Visit us on the Web: informit.com/aw
Indexer
Library of Congress Control Number: 2021940286 Ken Johnson
Proofreader
Copyright © 2022 Pearson Education, Inc.
Donna E. Mulder
All rights reserved. This publication is protected by copyright, and permission must be
Compositor
obtained from the publisher prior to any prohibited reproduction, storage in a retrieval
codeMantra
system, or transmission in any form or by any means, electronic, mechanical, photocopying,
recording, or likewise. For information regarding permissions, request forms and the
appropriate contacts within the Pearson Education Global Rights & Permissions Department,
please visit www.pearsoned.com/permissions/.
ISBN-13: 978-0-13-409634-6
ISBN-10: 0-13-409634-7
ScoutAutomatedPrintCode
9780134096346_print.indb 4 25/06/21 6:27 PM
v
Blake: For my siblings: Rusty, Annemarie.
Mercy, and Roger. One!
Larry: For Aidan and Ian. Don’t ever stop
exploring and learning.
v
9780134096346_print.indb 5 25/06/21 6:27 PM
This page intentionally left blank
9780134096346_print.indb 6 25/06/21 6:27 PM
Contents at a Glance
Preface xiii
1 Why Android? 1
2 Booting Acme 9
3 Getting Started 35
4 The Kernel 49
5 Platform Security 67
6 System Startup: Installing and Booting the System 93
7 Android Startup: Dalvik and Zygote 115
8 Getting to Android: The HAL 133
9 Getting to Java: The JNI 153
10 Project Treble: Binderized HAL 183
11 Creating a Custom Binderized HAL 199
12 Clients for a Custom Binderized HAL 219
Index 233
9780134096346_print.indb 7 25/06/21 6:27 PM
This page intentionally left blank
9780134096346_print.indb 6 25/06/21 6:27 PM
Contents
Preface xiii
1 Why Android? 1
Adopting Android 1
Full Stack 2
Broad Acceptance 2
Beautiful UI 2
Linux Based 2
Powerful Development Environment 3
Open Source 3
AOSP and Google 5
Other Choices 6
Micro-Controllers 6
Other RTOSs 7
Summary 8
2 Booting Acme 9
Setting Up a Build Machine 10
Downloading the Code 11
Repo 11
Forking the Source 15
Android Version Selection 16
Local Mirror 17
Hosted Git Repositories 18
Tree Snapshot 19
Repository Commit Pinning 19
Example: Local Mirror of Forked Repositories 19
Building an Image 24
Device Tools 27
fastboot 28
adb 29
Flashing the Device 30
Summary 33
9780134096346_print.indb 9 25/06/21 6:27 PM