Какие варианты реализации работы с сервером?android-21

val url = URL("https://api.example.com/data")
val connection = url.openConnection() as HttpURLConnection
try {
    connection.requestMethod = "GET"
    val inputStream = connection.inputStream
    // Обработка ответа
} finally {
    connection.disconnect()
}

val client = OkHttpClient()
val request = Request.Builder()
    .url("https://api.example.com/data")
    .build()

client.newCall(request).enqueue(object : Callback {
    override fun onResponse(call: Call, response: Response) {
        // Обработка ответа
    }
})

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

val retrofit = Retrofit.Builder()
    .baseUrl("https://api.example.com/")
    .addConverterFactory(GsonConverterFactory.create())
    .build()

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

val queue = Volley.newRequestQueue(context)
val request = JsonObjectRequest(Request.Method.GET, url, null,
    { response -> /* обработка */ },
    { error -> /* обработка */ })
queue.add(request)

val channel = ManagedChannelBuilder.forAddress("host", port)
    .usePlaintext()
    .build()
val stub = MyServiceGrpc.newBlockingStub(channel)
val response = stub.getData(request)

val query = """
    query {
        user(id: "123") {
            name
            email
        }
    }
""".trimIndent()

val request = Request.Builder()
    .url("https://api.example.com/graphql")
    .post(RequestBody.create(query, MEDIA_TYPE_JSON))
    .build()

val client = OkHttpClient()
val request = Request.Builder().url("ws://echo.websocket.org").build()
val listener = object : WebSocketListener() {
    override fun onMessage(webSocket: WebSocket, text: String) {
        // Обработка сообщения
    }
}
val ws = client.newWebSocket(request, listener)