Android Paging Library

NetworkService.kt

interface NetworkService {

    @GET("/everything?q=sports&apiKey=aa67d8d98c8e4ad1b4f16dbd5f3be348")
    fun getNews(@Query("page") page: Int, @Query("pageSize") pageSize: Int): Single<Response>

    companion object {
        fun getService(): NetworkService {
            val retrofit = Retrofit.Builder()
                    .baseUrl("https://newsapi.org/v2/")
                    .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                    .addConverterFactory(GsonConverterFactory.create())
                    .build()
            return retrofit.create(NetworkService::class.java)
        }
    }
}