Android_Scalable_Modularized_Testable_Architecture.pdf

Re-draw graphics from Android Developer Youtube Channel - Building a scalable, modularized, testable app from scratch.

Transcript

1. Denis 2022 Build a scalable, modularized, testable app from scratch From Android Developers
2. Architecture
3. Architecture(1) Domain Layer (optional) UI Layer Data Layer
4. Architecture(2) UI Data Displays data Reacts to changes Business logic Obtains and exposes data Data Events Reactive UI Single source of truth
5. Data Layer
6. Data Layer(1) Repository Data source Exposes data Centralizes changes Obtains data
7. Data Layer(2) Repository NetworkDataSource LocalDataSource Repository REST API DataStore
8. Data Layer(3) O ff l ine- fi rst architecture Repository NetworkDataSource LocalDataSource Sync
9. UI Layer
10. UI Layer(1) Screen State holder Displays UI state Handles UI logic Constructs UI state
11. UI Layer(2) UI element ViewModel Repository Repository Jetpack Compose
12. UI state composition(1) Repository A Repository B ViewModel UI state Combines/handles data from repositories Loading
13. UI state composition(2) Repository A Repository B ViewModel UI state Done Update UI state
14. Modularization
15. Type of module Responsible for Depends on :app :feature :core Bring features together Single user-facing functionality Single area of common functionality :feature :core :core :core
16. https://developer.android.com/topic/modularization
17. Testing
18. Test dependencies ViewModel Interface Implementation Repository Interface A Repository Interface B Network-DataA-Repository Test-DataA-Repository Local-DataB-Repository Test-DataB-Repository https://developer.android.com/training/testing/fundamentals/test-doubles
19. • Building a scalable, modularized, testable app from scratch • https://developer.android.com/topic/architecture • https://developer.android.com/topic/modularization • https://developer.android.com/topic/modularization/patterns • https://developer.android.com/training/testing/fundamentals/ test-doubles • https://github.com/android/nowinandroid References