What is used for network operations in Android…

For network operations in Android, the following are used:

HttpClient/HttpURLConnection (standard classes from Java, with HttpURLConnection preferred in newer Android versions due to efficiency).

Libraries:

Retrofit2: A popular library for making HTTP requests with an emphasis on a declarative approach and convenient JSON API handling.
OkHttp: A powerful and efficient HTTP client library, often used as the basis for Retrofit.
Volley: Developed by Google, suitable for small to medium network operations, with built-in image caching support.
AsyncHttpClient: Allows asynchronous HTTP requests but is somewhat outdated compared to OkHttp and Retrofit.

RxJava/Kotlin Coroutines: Although not network libraries themselves, they are often used to manage asynchronous network operations and handle responses in reactive or coroutine style respectively.

For low-level data handling, you can use:

URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
try {
    InputStream in = new BufferedInputStream(connection.getInputStream());
    // Read data from in
} finally {
    connection.disconnect();
}

Example of using Retrofit:

interface ApiService {
    @GET("users/{id}")
    suspend fun getUser(@Path("id") userId: String): User // Using suspend for coroutines
}

val retrofit = Retrofit.Builder()
    .baseUrl("https://api.example.com/")
    .addConverterFactory(GsonConverterFactory.create())
    .client(OkHttpClient.Builder().build()) // OkHttp is often used
    .build()

val service = retrofit.create(ApiService::class.java)

The choice of specific tools depends on project requirements, scale, and team preferences. In modern projects, Retrofit2 with OkHttp combined with Kotlin Coroutines or RxJava are most commonly used. Volley can be useful for simple cases and image handling.

What is used for network operations in Android?