基礎模組化知識簡報

1. 為你的專案加點模組化
Kaohsiung
YungHan Chang ( Kenny Chang )
Freelancer Android & Backend

2. 86%
work on multi-module
90%
would recommend considering.

3. Modularity of code is critical to managing
complexity, stability, readability, and
testability in an ever-growing codebase.

4. 54%
dif
fi
cult to
fi
nd learning materials
95%
of
fi
cial materials are insuf
fi
cient!

5. 綱要
● 特點
● Strategy
● Data domain presenter
● Feature
● Hybrid
● Dependency
● Gradle
● Library version control
● Now in android project

6. 不包含
● Dynamic module
● Gradle syntax
● Benchmark
● Lint

7. 模組化
What and why

8. 顆粒度
Component
Class
function
Gradle project

9. 顆粒度
Component
Class
function
Gradle project

10. 顆粒度
● 過於精細
● 成本
● 建構複雜度
● 專案複雜度
● 過於粗略
● 變成另⼀個⼤模組，失去模組化優勢

11. Pros
● 只有模組化可以
● 模組可重⽤性
● 嚴格控制可⾒性
● 動態發布
● 模組化幫你增強
● 關注點分離
● 問責和單⼀權責
● 封裝
● 測試
● 建構時間
● 平⾏開發

12. “Nothing wrong with single module.”

13. App architecture

14. Layer seperation

15. Layer seperation

16. Layer seperation

17. Layer seperation

18. Benefit of layering
● Reducing scope of attention
● Increase testability
● Clearer responsibility
● One way direction dependency

19. But not good enough for modularization, because…
:UI
:Domain
:Data

20. What if by features?
:Store :Product :FeatureC
Store ui
Store view Model
Store repository
Store remote source
Store local source

21. What if by features?
:Store 20s :Product. 13s :FeatureC. 17s
:app. 5s
:Core. 4s

22. What if by features?
:Store :Product :FeatureC
Store ui
Store view Model
Store repository
Store remote source
Store local source
Product ui
Product view Model
Product repository
Product remote source
Product ui
Product remote source
Product local source
.
.
.

23. Why not depends on other feature?
:Store 20s :Product. 13s :FeatureC. 17s
:app. 5s
:Core. 4s
59S

24. Combining two strategy
:ui:Store
:domain:Store
:data:Store
:ui:Product
:domain:Product
:data:Product
:ui:C
:domain:C
:data:C

25. Challenge
● Gradle
● Circular Dependency
● Style
● Navigation
● DI
● Library version

26. Gradle incremental
Build

27. Using api v.s. implementation
● api configuration will be transitively exposed to consumers of the library.
● implementation will not be exposed to consumer, and not leak into the consumer’s
compile classpath.

28. Using api v.s. implementation
Source : Android modularization preps things to know before modularizing

29. Circular dependencies
Source : Android modularization preps things to know before modularizing

30. Library version
● BuildSrc module
● Version catalog
:app

31. Using gradle control library version
● BuildSrc module
● Version catalog
:app

32. Now in Android
App Architecture

36. Now in Android
modularization

38. Feature module

39. Core module

40. Data module
NowInAndroid Single feature

41. :feature:author
● Grade

42. :build-logic
● Grade

43. :build-logic gradle

44. :core:data

45. Using different module in app module

46. Kotlin project

47. KMM

48. KMM

49. 模組化和抽象⼀樣，適度就好

50. 沒有最好的架構，只有最適合的

51. It depends…

52. Resource
● Android
● https://android-developers.googleblog.com/2022/09/announcing-new-guide-to-
android-app-modularization.html
● https://developer.android.com/topic/modularization
● https://developer.android.com/topic/architecture
● https://developer.android.com/topic/modularization/patterns#types-of-modules
● https://www.droidcon.com/2022/02/15/android-modularization-preps-things-to-know-
before-modularizing-your-app/
● https://github.com/android/nowinandroid/blob/main/docs/
ModularizationLearningJourney.md
● https://www.youtube.com/watch?v=16SwTvzDO0A

53. Resource
● Modularization
● https://proandroiddev.com/the-abc-of-modularization-for-android-in-2021-
e7b3fbe29fca
● https://www.droidcon.com/2022/11/15/modularization-flatten-your-graph-and-get-the-
real-benefits/
● https://www.jetbrains.com/help/idea/dependencies-analysis.html#validate-
dependencies
● https://www.droidcon.com/2022/06/28/solid-modularization-untangling-the-
dependency-graph/
● https://markonovakovic.medium.com/clean-architecture-is-not-domain-data-
presentation-e368d7ff8579
● https://martinfowler.com/bliki/PresentationDomainDataLayering.html

54. Resource
● Library version
● https://proandroiddev.com/using-version-catalog-on-android-projects-82d88d2f79e5
● https://proandroiddev.com/stop-using-gradle-buildsrc-use-composite-builds-
instead-3c38ac7a2ab3
● https://quickbirdstudios.com/blog/gradle-kotlin-buildsrc-plugin-android/
● https://www.droidcon.com/2021/07/19/better-dependency-management-using-
buildsrc-kotlin-dsl/
● https://www.droidcon.com/2022/05/13/gradle-version-catalogs-for-an-awesome-
dependency-management/
● https://docs.gradle.org/current/userguide/platforms.html

55. Ｑ＆Ａ