Arch Patterns in Android

Presented online at GDG Kolkata (https://youtu.be/h6g0T7CQbcY).
This presentation talks about Architecture patterns in android, and how to migrate from MVP to MVVM etc.

Transcript

1. Arch Patterns in Android
   GDG Kolkata
   Rivu Chakraborty
   https://www.rivu.dev
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2. Rivu Chakraborty
   Sr. Software Engineer - BYJU’S
   https://rivu.dev
   Tech Author, Tech Speaker, Android Dev,
   Kotlin Advocate
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3. Arch Patterns in Android
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4. Architecture
   What is an Architecture
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5. What’s an Architecture?
   An Architecture is a Code structure / collection of principles / patterns, that helps
   better organise code in a project for easy maintenance and future changes. It also
   enables you to have efficient test case coverages.
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6. Architecture
   Where does it come from? What Patterns / Principles
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7. SOLID
   Principles
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8. Every class should have a Single
   Responsibility
   Single-Responsibility
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9. Entities Should be Open for Extension,
   Closed for Modification
   Open-Closed
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10. Let Φ(x) be a property provable about
    objects x of type T. Then Φ(y) should be true for
    objects y of type S where S is a subtype of T.
    Liskov Substitution
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11. Clients should not be forced to depend upon
    interfaces that they do not use.
    Interface Segregation
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12. A class that uses a dependency, shouldn’t
    create / know how to create that dependency
    Depencency Inversion (IoC)
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13. Layers
    In an usual Android App
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14. data
    presentation
    ui
    domain (?)
    cache
    remote
    

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15. data
    presentation
    ui
    

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16. data
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    Repository
    LocalDataStore
    RemoteDataStore
    AppService / ApiService DB
    

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17. presentation & ui
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    MVP
    MVI
    MVVM
    MvRx
    mobius
    

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18. Architecture Patterns
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19. MVP
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    View Interface
    Contract
    Presenter Interface
    tight coupling
    

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20. MVVM
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    ViewModel
    

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21. MVVM + State
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    ViewModel State
    

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22. MVI
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    ViewModel
    State
    Action
    Result
    Intent
    

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23. Thank You
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    MVP: https://github.com/RivuChk/MovieSearchOMDBMVP
    MVVM: https://github.com/RivuChk/MovieSearchOMDBMVVM
    MVVM + State: https://github.com/RivuChk/MovieSearchOMDBMVVMState
    MVI: https://github.com/RivuChk/Android-MVI-Clean-Arch-Sample
    https://www.rivu.dev
    

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