양찬석 구글

2. 구글 코리아 | 양찬석
나누고 쪼개지는 안드로이드

3. Home screen widgets
Soft keyboards
Speech recognition
Live folders

4. Live Folder!

5. OPEN 모든 앱은 동일하다.
앱의 경계를 넘어.. 빠르고 쉬운 앱 개발

6. Linux Kernel
Libraries
Application Framework
Applications
Android
Runtime
Android Architecture in 2010
자원 관리,
보안
넓은 개발자
생태계

7. 1.Application Process

8. Multitasking the Android Way in 2010
“Application switching on a mobile device is
extremely critical.”
“This is especially important when the user is
switching between a few applications, such as
switching to look at a new SMS message while
watching a video, and then returning to that
video.”
written by Dianne Hackborn, 28 April 2010

9. Multitasking the Android Way in 2010
사용자가 앱을 종료할 필요가 없음
메모리 사용량을 최소화
앱 실행 및 다른 앱으로 전환이 빨라야함
선탑재되는 앱과 동일한 수준의 API 제공
written by Dianne Hackborn, 28 April 2010

10. 빠른 앱 전환 vs 한정된 메모리

11. App #1 App #2 App #3 App #N...
System Services (Managers…)

12. App #1 App #2 App #3 App #N...
System Services (Managers…)
process process process process
multiple process

13. App #1 App #2 App #3 App #N...
System Services (Managers…)
Foreground Service Background Cached
process process process process
multiple process

14. App #1 App #2 App #3 App #N...
System Services (Managers…)
Foreground Service Background Cached
process process process process
multiple process
Low Memory

15. Binder = 아주 빠른 IPC
Dalvik, ART = 메모리 효율적인 런타임
Zygote = 아주 빠른 프로세스 생성

16. 2. Application Components

17. Android Application
?App #1
process

18. Application Components?
Activity
Service
Receiver
Content Provider
Process
View
Fragment
Thread

19. Process
View
Fragment
Thread
Application Components?
Activity
Service
Receiver
Content Provider

20. Application Components?
Activity
Service
Receiver
Content Provider
= Entry Point

21. 앱을 시작하는 4가지 방법
사용자에게 UI를 제공
백그라운드에서 작업을 수행
특정 이벤트에 반응
데이터를 제공

22. Android Manifest
“A manifesto is a
published declaration of
the intentions, motives, or
views of the issuer”
-from wikipedia-

24. to be continued; DOZE and Background Limitation

25. 3. Framework

26. AOSP
Android Open Source Project

27. 24,000

28. 다양한 디바이스

31. 호환성
지옥

32. Linux Kernel
Libraries
Application Framework
Applications
Android
Runtime
BIG BLACK BOX
안드로이드 호환성

33. Linux Kernel
Libraries
Application Framework
Applications
Android
Runtime
BIG BLACK BOX
CDD = Compatibility Definition
Document
CTS = Compatibility Test Suite
Platform APIs

36. MAY
your
s
X

37. 플랫폼 버전 업데이트가 너무 느리다

38. 안드로이드 디저트 베이커리

39. Project Treble
Libraries
Application Framework
Applications
BIG BLACK BOX

40. Project Treble
Libraries
Application Framework
Applications
BIG BLACK BOX
Vender
Implementation
Android OS
Framework
Vender Interface
+ VTS

41. Before After

42. 안드로이드 디저트 베이커리

44. 긴급한 업데이트가 필요하면?

45. Project Mainline
Libraries
Application Framework
Applications
BIG BLACK BOX
Vender
Implementation
Android OS
Framework

46. Project Mainline
Libraries
Application Framework
Applications
BIG BLACK BOX
Vender
Implementation
Android OS
Framework

47. 똑같은 코드인데 기기마다 동작이 다르면?

48. System Services
(Managers…)
App #1
Platform APIs
왜 다르지?

49. System Services
(Managers…)
App #1
framework.jar
Platform APIs디바이스마다 다를 수 있음
왜 다르지?

50. Jetpack

51. System Services
(Managers…)
App #1
framework.jar
Platform APIs디바이스마다 다를 수 있음
Jetpack
Jetpack Library
앱에 포함됨

52. 4. APK

53. 폰 + 태블릿 + TV + 오토 + 웨어
ARM + ARM64 + X86 + X86_64
mdpi + hdpi + xhdpi + xxhdpi + xxxhdpi
en, ko, ja, fr, de, zh...
SUPER APK
>> APK 용량 증가

54. 앱 번들 업로드
Split APK
Split APK
Split APK
최적화 된
APK 다운로드
Split APK
Google Play에서
재포장
다이나믹 딜리버리

55. 다이나믹 딜리버리

56. apk1
apk1
apk3
APP
APK Splits

57. Base
xxxhdpi
xxhdpi
xhdpi
hdpi
mdpi
ldpi
x86_64 arm64
x86 arm
ptfr
en
de
zh
Pixel 2XL
다이나믹 딜리버리
ko
ja

58. Base
xxxhdpi
arm64
ja
Pixel 2XL
다이나믹 딜리버리
ko

59. 나누고 쪼개지는 안드로이드
Process
Application Component
Project Treble
Project Mainline
Jetpack
Dynamic Delivery