Multipart Request using Retrofit 1.8.0 not working

Question

I have like 4 days, trying to make a Multipart Request using Retrofit 1.8.0 in android with any success. My interface looks something like this

@Multipart
@         


        

Answer 1

I did this instead for the interface

interface MultipartFormDataService {
    @POST("/{uploadPath}")
    void multipartFormDataSend(
            @EncodedPath("uploadPath") String uploadPath,
            @Body MultipartTypedOutput multipartTypedOutput,
            Callback cb);
}

Then later when I call it, it looks like this

// creating the Multipart body using retrofit
MultipartTypedOutput multipartTypedOutput = new MultipartTypedOutput();
TypedString idParam = new TypedString("[ID Value]")
TypedString bodyParam = new TypedString("[Body text]")
ByteArrayTypedOutput byteMultipartTypedOut = new ByteArrayTypedOutput(bytes)

// add parts
multipartTypedOutput.addPart("id", idParam);
multipartTypedOutput.addPart("body", bodyParam);
multipartTypedOutput.addPart("attachment", extraParamTypedString);

// send
multipartService.multipartFormDataSend(
                "[TARGET URL]",
                multipartTypedOutput,
            aCallback);

My ByteArrayTypedOutput was simple

public class ByteArrayTypedOutput implements TypedOutput {

    private MultipartFormMetadata metadata;
    private byte[] imageData;

    public ByteArrayTypedOutput(MultipartFormMetadata metadata, byte[] imageData)
        this.metadata = metadata;
        this.imageData = imageData;
    }

    @Override
    public String fileName() {
        return metadata.fileName;
    }

    @Override
    public String mimeType() {
        return metadata.fileMimeType;
    }

    @Override
    public long length() {
        return imageData.length;
    }

    @Override
    public void writeTo(OutputStream outputStream) throws IOException {
         outputStream.write(imageData);
    }
}