Compose MVVM Retrofit ViewMode LiveData Complete Example Android App. How to implement MVVM with Retrofit in compose based android app.

https://medium.com/@dheerubhadoria/jetpack-compose-android-app-with-mvvm-architecture-and-retrofit-api-integration-4eb61ca6fbf2

           View        
   
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        ViewModel     

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         Repository    
    
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         Retrofit      
    
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           API         

View: The user interface (UI) layer responsible for displaying the credit card data. It interacts with the ViewModel to fetch the credit card data.

ViewModel: Acts as an intermediary between the View and the Repository. It exposes the credit card data as LiveData or StateFlow for the View to observe. It receives requests from the View and communicates with the Repository to fetch the data.

Repository: Manages the data operations. It abstracts the data source (API) and provides a clean API for data access. In this case, it interacts with the Retrofit client to make API calls and fetch credit card data.

Retrofit: A type-safe HTTP client for making network requests. It handles the network operations, such as making HTTP requests, receiving responses, and parsing JSON. It communicates with the API to fetch credit card data.

API: The backend API that provides the credit card data. It receives requests from Retrofit and returns the credit card data as a response.

The flow of data starts from the View, which triggers a request for credit card data in the ViewModel. The ViewModel communicates with the Repository, which uses Retrofit to make an API call to fetch the data from the API. The API returns the credit card data as a response, which is then passed back to the Repository. The Repository provides the data to the ViewModel, which updates its state and exposes the credit card data to the View. Finally, the View displays the credit card data to the user.

This architecture follows the MVVM pattern, where the ViewModel separates the business logic from the UI layer, and the Repository abstracts the data operations, allowing for easier testing and maintenance. Retrofit handles the network communication, providing a convenient way to fetch data from the API.