Send image or file multipart retrofit RxJava

sendImageMultipartRetrofitRxJava.kt

//Preparing the request
val filePart = MultipartBody.Part
                .createFormData("file", "fileName",
                        RequestBody.create(MediaType.parse("image/jpeg"), File("/your/File/Path.jpg")))
//service.sendFile(id, filePart)
  
//Request definition retrofit
@PUT("https://www.yourdomain.com/api/file/{id}")
@Multipart
fun sendFile(@Path("id") id: Long, @Part file: MultipartBody.Part ) : Observable<YourModel>