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Recommendation system (Kotlin - Jetpack Compose)

The frontend of the system is developed using Jetpack Compose, a modern declarative UI toolkit for building native Android interfaces, integrating with a hybrid recommendation system backend.

GitHub

MOBILE APPLICATION INTERACTING WITH A RECOMMENDATION SYSTEM FOR E-COMMERCE APPS

Introduction

The frontend of the system is developed using Jetpack Compose, a modern declarative UI toolkit for building native Android interfaces. The architecture follows the Model-View- ViewModel (MVVM) design pattern, which is widely adopted in Android development for promoting a clear separation of concerns and enabling scalable, testable, and maintainable codebases. The MVVM architecture organizes the application into three main components:

  • Model: Represents the data and business logic layer. In this system, the Model includes data classes, repositories, and API interfaces that handle data retrieval from the backend using Retrofit and OkHttp.
  • View: Refers to the UI components built with Jetpack Compose. The View is responsible for displaying data to the user and capturing user input, but it contains minimal logic. It observes state changes exposed by the ViewModel and updates, accordingly, ensuring a reactive and declarative UI flow.
  • ViewModel: Acts as the intermediary between the View and the Model. It holds and manages UI-related data, handles user interactions, and communicates with repositories to fetch or update data. The ViewModel exposes observable state using StateFlow or LiveData, allowing the View to react automatically to data changes.

Dependencies

  • Kotlin 2.0.0
  • Jetpack Compose: details in the gradle/libs.versions.toml file.
  • Android Studio Ladybug | 2024.2.1 3.2-8.7
  • Dagger Hilt com.google.dagger:hilt-android:2.51.1
  • Retrofit and OkHttp3 com.squareup.retrofit2:retrofit:2.11.0 and com.squareup.okhttp3:okhttp:4.12.0
  • Coil io.coil-kt:coil-compose:2.4.0
  • Kotlin Serialization org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.3
  • Navigation Compose androidx.navigation:navigation-compose:2.8.9
  • And others listed in the app/build.gradle.kts file

Model-View-ViewModel Architecture Pattern

mvvm drawio (1)

Product Listing Page

product_list_screen

Running Locally?

  • Use Android studio, preferrably (Ladybug | 2024.2.1 3.2-8.7)