The document discusses building custom Android images based on AOSP (Android Open Source Project) to create a "more than Nexus, better than Nexus" experience. It explains how to download and build the AOSP source code, modify system properties and resources, replace apps, and build images. The goal is to unlock hidden features, improve performance, and add new capabilities without modifying the original source code. In conclusion, with AOSP it is possible to build your own "real Nexus" images and customize the experience beyond what is offered on stock Nexus devices.

1. AOSP로 넥서스 보다
더 넥서스처럼 만들기
More than Nexus,
Better than Nexus.

2. Nexus 4 (2012)
● Android 4.2 (2012)
● Android 4.3
● Android 4.4 (2013)
● Android 5.0 (2014)
● Android 5.1
● Android 6.0 (2015)
Image Source

3. Android M on Nexus 4!!!

4. 그런데 빌드를 끝내고 나면....

5. (C) 이말년 Image Source

6. Agenda ● What is Android Open
Source Project?
● Following Nexus
● More than Nexus, Better
than Nexus

7. What is
Android Open
Source Project?

8. Hosted on AOSP

9. How to build
Android Source code Downloading and Building

10. Nexus Series
제조사 제품 이름 hardware product
Huawei Nexus 6P angler? ?
LG Nexus 5X bullhead bullhead
Motorola Nexus 6 shamu shamu
LG Nexus 5 hammerhead hammerhead
ASUS Nexus 7(2013) flo, deb flo, deb
LG Nexus 4 mako mako
Samsung Galaxy Nexus tuna maguro,toro
Samsung Nexus S herring crespo

11. Android Emulator
Goldfish ランチュウ（蘭鋳、蘭虫、卵虫）Ranchu
Image Source Image Source

12. Nexus Series
제조사 제품 이름 hardware product Nexus branded product
Huawei Nexus 6P angler? ? ?
LG Nexus 5X bullhead bullhead bullhead
Motorola Nexus 6 shamu shamu shamu
LG Nexus 5 hammerhead hammerhead heammerhead
ASUS Nexus 7(2013) flo, deb flo, deb razor, razorg
LG Nexus 4 mako mako occam
Samsung Galaxy Nexus tuna maguro,toro yakju,takju,mysid
Samsung Nexus S herring crespo soju

13. mako occam

14. 무엇부터 시작해
야 하나?
Following Nexus
Be copycat

15. Image Source
mako occam

16. system/app:
BackupTestApp Development HTMLViewer PicoTts
BasicDreams DevelopmentSettings KeyChain PrintSpooler
Browser DocumentsUI LatinIME Protips
Calculator DownloadProviderUi LegacyCamera QuickSearchBox
Calendar Email LiveWallpapersPicker SdkSetup
CaptivePortalLogin EmulatorSmokeTests Music SoundRecorder
CertInstaller Exchange2 NetSpeed UserDictionaryProvider
CustomLocale Fallback OpenWnn webview
DeskClock Gallery PacProcessor
system/app:
BasicDreams DMAgent GoogleContactsSyncAdapter Maps
Bluetooth DocumentsUI GoogleEars MediaShortcuts
BluetoothMidiService DownloadProviderUi GoogleHindiIME Music2
Books Drive GoogleHome NewsstandStub
CalculatorGoogle EditorsDocsStub GooglePinyinIME 중간 생략
CalendarGooglePrebuilt EditorsSheetsStub GoogleTTS Videos
CaptivePortalLogin EditorsSlidesStub Hangouts Wallet
CertInstaller FaceLock KeyChain WebViewGoogle
Chrome FitnessPrebuilt KoreanIME YouTube
CloudPrint2 GoogleCamera LatinImeGoogle talkback

17. 앱 대응 테이블
Emulator (AOSP) Nexus 5
Browser Chrome
Calculator CalculatorGoogle
Dialer GoogleDialer
LegacyCamera GoogleCamera
Music Music2
Launcher3 GoogleHome
webview WebViewGoogle

18. Android의
숨겨진 심장

19. GAPPS
Collection of Google Mobile Services
and Apps
Search Gapps on Google

20. 패키지만 설치하면 끝?
Image Source

21. 각종 상수 및 기본 설정값
● /root/default.prop
● /system/build.prop
● /system/framework/framework-res.apk
● /system/priv-app/SettingsProvider.apk
● /system/priv-app/Settings.apk
● /system/priv-app/SystemUI.apk
● /system/priv-app/TeleService.apk

22. aapt
● Android Asset Packaging Tool
● 다음 명령어로 .apk 파일에 포함된 리소스 분석 가능
$ aapt d --values resources framework-res.apk
spec resource 0x01040029 android:string/default_sms_application:
flags=0x00000000
resource 0x01040029 android:string/default_sms_application:
t=0x03 d=0x00001e00 (s=0x0008 r=0x00)
(string8) "com.android.mms"

23. 수정 전략
● 안드로이드 기본 빌드 스크립트를 이용해 factory image 생성
● 유지 보수가 가능
○ bug fix 또는 major 업그레이드가 되었을 때 따라가기 편해야 한다.
● 결론
○ 원래 코드는 되도록이면 건드리지 말자
○ 수정하고 싶으면 원래 코드 바깥에서 건드리자

24. 되는데요...
Image Source

25. 상수 교체 (system property)
PRODUCT_PROPERTY_OVERRIDES :=
ro.com.android.dataroaming=false

26. Resource 교체
기본 리소스:
frameworks/base/core/res/res/values/config.xml
/drawable-mdpi/ic-search.png
특정 기기용 리소스:
device/lge/occam/overlay/frameworks/base/core/res/res/

27. Resource 교체
PRODUCT_PACKAGE_OVERLAYS :=
device/lge/occam/overlay
out-occam-user/host/linux-x86/bin/aapt package blahblah
-S device/lge/occam/overlay/frameworks/base/core/res/res
-S device/lge/mako/overlay/frameworks/base/core/res/res
-S frameworks/base/core/res/res

28. 앱 교체
include $(CLEAR_VARS)
LOCAL_MODULE := Chrome
LOCAL_SRC_FILES := com.android.chrome.apk
LOCAL_MODULE_CLASS := APPS
LOCAL_MODULE_TAGS := optional
LOCAL_OVERRIDES_PACKAGES := Browser
LOCAL_CERTIFICATE := PRESIGNED
LOCAL_MODULE_OWNER := google
include $(BUILD_PREBUILT)

29. 앱 교체
PRODUCT_PACKAGES :=
Chrome

30. 빌드 시작

31. 빌드 끝

33. More than Nexus,
Better than Nexus.

34. Unlock hidden
feature.

35. Improve performance

36. Add new feature

39. Conclusion
● You can build your own Real Nexus image without modification source
codes on AOSP.
● You can unlock or add several features, and improve your experiences

40. References
● http://s.android.com/
● How to build Android Marshmallow on Nexus 4
● https://github.com/ganadist/device_lge_mako
● https://github.com/ganadist/device_lge_occam
● https://github.com/ganadist/gms_addon/tree/android-6.0.0_r1