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Android System Programming

You're reading from   Android System Programming Porting, customizing, and debugging Android HAL

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781787125360
Length 470 pages
Edition 1st Edition
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Tools
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Authors (2):
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Roger Ye Roger Ye
Author Profile Icon Roger Ye
Roger Ye
Shen Liu Shen Liu
Author Profile Icon Shen Liu
Shen Liu
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Table of Contents (15) Chapters Close

Preface 1. Introduction to Android System Programming 2. Setting Up the Development Environment FREE CHAPTER 3. Discovering Kernel, HAL, and Virtual Hardware 4. Customizing the Android Emulator 5. Enabling the ARM Translator and Introducing Native Bridge 6. Debugging the Boot Up Process Using a Customized ramdisk 7. Enabling Wi-Fi on the Android Emulator 8. Creating Your Own Device on VirtualBox 9. Booting Up x86vbox Using PXE/NFS 10. Enabling Graphics 11. Enabling VirtualBox-Specific Hardware Interfaces 12. Introducing Recovery 13. Creating OTA Packages 14. Customizing and Debugging Recovery

Customizing and Debugging Recovery

In the last chapter, we created an OTA package for our x86vbox device. We also improved the recovery to remove all dependencies from the Android system so that it becomes a self-contained environment. We can run recovery and update the system using the OTA package we created. After the system is updated, we cannot use a two stages boot since the system becomes a standard Android system image layout.

In this chapter, we will enhance both recovery and the updater to support both standard and two stages boot using one system image. We will also enhance recovery to resolve one issue that we haven't talked about, which is how we pick up the OTA package in the recovery environment. In this chapter, we will cover the following topics:

  • Introducing the Android native application debug skill, which we can use to debug both recovery and the updater
  • Extending recovery and the updater...
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