A clean architecture example. Using Kotlin Flow, Retrofit and Dagger Hilt, etc.

Related tags

Kotlin Projects android clean-architecture android-clean-architecture kotlin-flow
Overview

android-clean-architecture

A clean architecture example. Using Kotlin Flow, Retrofit and Dagger Hilt, etc.

Intro

Architecture means the overall design of the project. It’s the organization of the code into classes or files or components or modules. And it’s how all these groups of code relate to each other. The architecture defines where the application performs its core functionality and how that functionality interacts with things like the database and the user interface.

Clean architecture refers to organizing the project so that it’s easy to understand and easy to change as the project grows. This doesn’t happen by chance. It takes intentional planning.

Reference

  • This android app using backend from this repo
  • If you want tutorial how to create this app step by step, go to this youtube playlist.

Screenshots

Notes

I created this app just for example how to implement clean architecture on android. It really biased to my preference and experience. Also, clean architecture is not mandatory to do. If you feel that you/your team are taking so much benefit by implementing this design pattern, then go for it. Otherwise, don't use it or just modify to your/your team preferences.

Main Picture

There are 3 layer in this app.

Presentation Layer Domain Layer Data Layer
your ui/view entity data source, dto
your viewmodel usecase repository implementation
probably your extension repository interface your library config(retrofit/room)
etc... etc.. etc...

App Level Example

Presentation Layer Something in Between Domain Layer Data Layer Outer data layer
LoginActivity & LoginViewModel <- LoginUseCase -> <- LoginRepository (interface) -> <- LoginRepositoryImplementation DataSource
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Comments
  • About validate input vlaue by MutableStateFlow &　LoginActivityState

    About validate input vlaue by MutableStateFlow &　LoginActivityState

    Dear Sir

    thx your demo

    i try upgrade Hilt verion -- PR https://github.com/ydhnwb/android-clean-architecture/issues/2

    now i base your demo try to modify something -like input value validate

    i think validate input must into Viewmodel

    and the steps is "validate input --> login"

    it can use kotlin flow combine

    so i try it https://github.com/CMingTseng/android-clean-architecture/blob/b42a42819c88c5a7adbf86cdc50031aa72849fea/app/src/main/java/com/ydhnwb/cleanarchitectureexercise/presentation/login/LoginViewModel.kt#L54

    but something is not right

    1. if input email "or" pwd is wrong , the validate result notify to UI by MutableStateFlow is right ,the UI (fragment) will show "not email type" or "PWD length wrong "

    2. when input email "And" pwd are wrong ,the validate result notify to UI by MutableStateFlow only one time !!! the UI (fragment) anly show "not email type" or "PWD length wrong " , not both

    what is wrong ?

    THX

    opened by CMingTseng 0
  • hilt-lifecycle-viewmodel is deprecated @Dagger 2.34

    hilt-lifecycle-viewmodel is deprecated @Dagger 2.34

    Dear Sir

    how fix

    1. hilt-lifecycle-viewmodel is deprecated

    2. In Dagger 2.31, it's possible to achieve the above without using @HiltViewModel and passing everything manually

    THX

    https://issuetracker.google.com/issues/188663855#comment2

    https://stackoverflow.com/questions/68649447/viewmodel-constructor-should-be-annotated-with-inject-instead-of-assistedinjec

    opened by CMingTseng 0
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Prieyudha Akadita S.
Prieyudha Akadita S.
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