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

I am highlighting the solution in both 1.9 and 2.0 since it is useful for some

In 1.9, I think the better solution is to save the file to disk and use it as Typed file like:

RetroFit 1.9

(I don't know about your server-side implementation) have an API interface method similar to this

@POST("/en/Api/Results/UploadFile")
void UploadFile(@Part("file") TypedFile file,
                @Part("folder") String folder,
                Callback callback);

And use it like

TypedFile file = new TypedFile("multipart/form-data",
                                       new File(path));

For RetroFit 2 Use the following method

RetroFit 2.0 ( This was a workaround for an issue in RetroFit 2 which is fixed now, for the correct method refer jimmy0251's answer)

API Interface:

public interface ApiInterface {

    @Multipart
    @POST("/api/Accounts/editaccount")
    Call editUser(@Header("Authorization") String authorization,
                        @Part("file\"; filename=\"pp.png\" ") RequestBody file,
                        @Part("FirstName") RequestBody fname,
                        @Part("Id") RequestBody id);
}

Use it like:

File file = new File(imageUri.getPath());

RequestBody fbody = RequestBody.create(MediaType.parse("image/*"),
                                       file);

RequestBody name = RequestBody.create(MediaType.parse("text/plain"),
                                      firstNameField.getText()
                                                    .toString());

RequestBody id = RequestBody.create(MediaType.parse("text/plain"),
                                    AZUtils.getUserId(this));

Call call = client.editUser(AZUtils.getToken(this),
                                  fbody,
                                  name,
                                  id);

call.enqueue(new Callback() {

    @Override
    public void onResponse(retrofit.Response response,
                           Retrofit retrofit) {

        AZUtils.printObject(response.body());
    }

    @Override
    public void onFailure(Throwable t) {

        t.printStackTrace();
    }
});