Retrofit(2.0 beta2) Multipart file upload doesn't work

Question

I am using Square Retrofit version 2.0 beta2. I have tried to follow this tutorial .I am trying to upload a bitmap image to the server but somehow code is not working. I hav

Answer 1

You are nesting a multipart request body here (A multipart within a multipart).

Implemented something similar recently, instead of using @Multipart and @Part you can use @Body with MultipartBuilder.

@POST("/api/photo/user/{userId}")
Call uploadUserProfilePhoto(@Path("userId") Integer userId, @Body RequestBody photo);

Then instead of using MultipartBuilder.addPart(...) use MultipartBuilder.addFormDataPart(name, filename, requestBody)

private void uploadProfilePhoto() {
    BeamItService service = BeamItServiceTransport.getService();

    MediaType MEDIA_TYPE_PNG = MediaType.parse("image/jpeg");
    byte [] data = BitmapUtility.getBitmapToBytes(((BitmapDrawable) ivProfilePhoto.getDrawable()).getBitmap());
    Log.d(TAG, String.format("Profile detals => user_id: %d, size of data: %d", 5, data.length));

    RequestBody requestBody1 = RequestBody.create(MEDIA_TYPE_PNG, data);
    Log.d(TAG, "requestBody: " + requestBody1.toString());
    RequestBody requestBody2 = new MultipartBuilder()
            .type(MultipartBuilder.FORM)
            .addFormDataPart("photo", "t.jpg", requestBody1)
            .build();
    Log.d(TAG, "requestBody: " + requestBody2.toString());
//  ProfileDetails profileDetails = new DBHelper(this).fetchProfileDetails();

    Call call = service.uploadUserProfilePhoto(5, requestBody2);
    call.enqueue(new ProfilePhotoUploadCallback());
}