More than nexus, better than nexus

AOSP로 넥서스 보다더 넥서스처럼 만들기

More than Nexus, Better than Nexus.

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)

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Android M on Nexus 4!!!

그런데 빌드를 끝내고 나면....

(C) 이말년 Image Source

Agenda ● What is Android Open Source Project?

● Following Nexus

● More than Nexus, Better than Nexus

What isAndroid Open Source Project?

Hosted on AOSP

How to build

Android Source code Downloading and Building

Nexus Series제조사 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

Android Emulator

Goldfishランチュウ（蘭鋳、蘭虫、卵虫）Ranchu

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Nexus Series제조사 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

mako occam

무엇부터 시작해야 하나?

Following NexusBe copycat

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mako occam

system/app:BackupTestApp Development HTMLViewer PicoTtsBasicDreams DevelopmentSettings KeyChain PrintSpoolerBrowser DocumentsUI LatinIME ProtipsCalculator DownloadProviderUi LegacyCamera QuickSearchBoxCalendar Email LiveWallpapersPicker SdkSetupCaptivePortalLogin EmulatorSmokeTests Music SoundRecorderCertInstaller Exchange2 NetSpeed UserDictionaryProviderCustomLocale Fallback OpenWnn webviewDeskClock Gallery PacProcessor

system/app:BasicDreams DMAgent GoogleContactsSyncAdapter MapsBluetooth DocumentsUI GoogleEars MediaShortcutsBluetoothMidiService DownloadProviderUi GoogleHindiIME Music2Books Drive GoogleHome NewsstandStubCalculatorGoogle EditorsDocsStub GooglePinyinIME 중간 생략CalendarGooglePrebuilt EditorsSheetsStub GoogleTTS VideosCaptivePortalLogin EditorsSlidesStub Hangouts WalletCertInstaller FaceLock KeyChain WebViewGoogleChrome FitnessPrebuilt KoreanIME YouTubeCloudPrint2 GoogleCamera LatinImeGoogle talkback

앱 대응 테이블

Emulator (AOSP) Nexus 5

Browser Chrome

Calculator CalculatorGoogle

Dialer GoogleDialer

LegacyCamera GoogleCamera

Music Music2

Launcher3 GoogleHome

webview WebViewGoogle

Android의숨겨진 심장

GAPPS

Collection of Google Mobile Services and Apps

Search Gapps on Google

패키지만 설치하면 끝?

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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

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"

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

되는데요...

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상수 교체 (system property)

PRODUCT_PROPERTY_OVERRIDES := \

ro.com.android.dataroaming=false \

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/

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

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)

앱 교체

PRODUCT_PACKAGES := \

Chrome \

빌드 시작

빌드 끝

More than Nexus,Better than Nexus.

Unlock hidden feature.

Improve performance

Add new feature

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

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