POST Multipart Form Data using Retrofit 2.0 including image

Question

I am trying to do a HTTP POST to server using Retrofit 2.0

MediaType MEDIA_TYPE_TEXT = MediaType.parse(\"text/plain\");
MediaType MEDIA_TYPE         


        

Answer 1

in kotlin its quite easy, using extensions methods of toMediaType, asRequestBody and toRequestBody here's an example:

here I am posting a couple of normal fields along with a pdf file and an image file using multipart

this is API declaration using retrofit:

    @Multipart
    @POST("api/Lesson/AddNewLesson")
    fun createLesson(
        @Part("userId") userId: RequestBody,
        @Part("LessonTitle") lessonTitle: RequestBody,
        @Part pdf: MultipartBody.Part,
        @Part imageFile: MultipartBody.Part
    ): Maybe>

and here is how to actually call it:

api.createLesson(
            userId.toRequestBody("text/plain".toMediaType()),
            lessonTitle.toRequestBody("text/plain".toMediaType()),
            startFromRegister.toString().toRequestBody("text/plain".toMediaType()),
            MultipartBody.Part.createFormData(
                "jpeg",
                imageFile.name,
                imageFile.asRequestBody("image/*".toMediaType())
            ),
            MultipartBody.Part.createFormData(
                "pdf",
                pdfFile.name,
                pdfFile.asRequestBody("application/pdf".toMediaType())
            )