Forgetting android v2

Dec 14, 20153 likes1,194 views

Architecture is About Intent, not Frameworks. So in this talk we are gonna talk about how you can prepare your android application to use the android framework as a tool instead of cramming your app into their limited constraints. We are gonna focus on SOLID principles, and concepts like testability, independency of UI, decoupled code, etc, will take a fundamental part of this session.

Forgetting Android v.2
Jorge Juan Barroso Carmona
jorge@karumi.com
@ﬂipper83
+JorgeJBarroso
Android expert

Basho. Poet
Karumi is the beauty of ordinary things spoken of in a
simple way.

Any fool can write code that a computer can understand. Good
programmers write code that humans can understand.
Martin Fowler

Single responsibility principle
Open/closed principle
Liskov substitution principle
Interface segregation principle
Dependency inversion principle

A good architecture allows you to defer framework decisions. A
good architecture allows frameworks to act as plugins to the app.
Robert Martin
“The database is a detail, a hardware detail. We would not
use one at all if all our data could ﬁt in memory for ever”

UI
External
Interfaces
Db
Push
Network
Storage
Interfaces
Interfaces
Business
Model
Interactors
Interactors

UI
Layer
UI
Layer
UI
Data Model
Data
Mapper
Interactor
Bussines
Data Model
Data
Storage
Test
Storage
Data
Mapper
Data
Mapper
Storage
Data Model
Test
Data Model

FeedViewModel
FeedBoundary
FeedListFragment
FeedProvider
GetFeed GetFeedImp
List<Hipster>
User
DataSource
Net
UserDataSourceLikeDataSource
Like
DataSource
Parse
API
UserApi
API
Retroﬁt
api
Parse
api
UI Layer Domain Layer
use Cases
or Interactors Data sources

FeedViewModel
FeedListFragment
FeedPresenter
GetFeed
Hipsters
User
Repository
Like
Repository
UserDatasource
UserApi
LikeDS
Retroﬁt
api
DbView
Syncronous
LikeApi
Retroﬁt
api
Parse
UserDBParse
Parse
UI Layer / MVP
Domain Layer
Use cases Data sources
Hipsters
Read only

Conclusion3
http://www.ﬂickr.com/photos/inf3ktion/

Find meI am very social!
jorge@karumi.com
@ﬂipper83
+JorgeJBarroso
Questions?

This document discusses principles of clean architecture and how to structure Android applications according to those principles. It recommends separating an app into layers including UI, business logic, data access, and external interfaces. Each layer only knows about the layers immediately around it, allowing independence and flexibility. The document provides examples of how to implement clean architecture in Android with features like view models, boundary classes, and data mappers. Overall it promotes writing code that is easy to test, modify, and maintain as requirements change over time.

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The Rise of AI Agents-From Automation to Autonomous TechnologyImpelsys Inc.

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Forgetting android v2

1. Forgetting Android v.2 Jorge Juan Barroso Carmona jorge@karumi.com @ﬂipper83 +JorgeJBarroso Android expert

2. Basho. Poet Karumi is the beauty of ordinary things spoken of in a simple way.

4. Any fool can write code that a computer can understand. Good programmers write code that humans can understand. Martin Fowler

6. 1 Solid

7. Single responsibility principle Open/closed principle Liskov substitution principle Interface segregation principle Dependency inversion principle

8. Clean Architecture2

9. A good architecture allows you to defer framework decisions. A good architecture allows frameworks to act as plugins to the app. Robert Martin “The database is a detail, a hardware detail. We would not use one at all if all our data could ﬁt in memory for ever”

10. UI External Interfaces Db Push Network Storage Interfaces Interfaces Business Model Interactors Interactors

11. UI Layer UI Layer UI Data Model Data Mapper Interactor Bussines Data Model Data Storage Test Storage Data Mapper Data Mapper Storage Data Model Test Data Model

12. FeedViewModel FeedBoundary FeedListFragment FeedProvider GetFeed GetFeedImp List<Hipster> User DataSource Net UserDataSourceLikeDataSource Like DataSource Parse API UserApi API Retroﬁt api Parse api UI Layer Domain Layer use Cases or Interactors Data sources

13. FeedViewModel FeedListFragment FeedPresenter GetFeed Hipsters User Repository Like Repository UserDatasource UserApi LikeDS Retroﬁt api DbView Syncronous LikeApi Retroﬁt api Parse UserDBParse Parse UI Layer / MVP Domain Layer Use cases Data sources Hipsters Read only

14. Conclusion3 http://www.ﬂickr.com/photos/inf3ktion/

15. Good Layer Responsabilites

16. Easy to test and mock

17. Easy to add or modify code

18. Easy to hide implementations

19. Easy to ﬁnd smells

20. Async code

21. Duplicate data model