What are the differences between OkHttp and Retrofit libraries when implementing network requests in applications?

OkHttp is a low-level HTTP client library responsible for executing network requests, managing connections, caching, and handling responses.

Retrofit is a high-level library built on top of OkHttp that simplifies the creation of REST API clients. It allows describing HTTP requests through interfaces and annotations, automatically converting JSON to objects and vice versa.

Summary:

• OkHttp is the foundation for network operations.
• Retrofit is a convenient tool for working with REST APIs, using OkHttp under the hood.

Example of using Retrofit:

public interface ApiService {
    @GET("users/{id}")
    Call<User> getUser(@Path("id") int userId);
}