Uri imageUri = Uri.fromFile(new File(fileName));

Map<String, RequestBody> map = new HashMap<>();
if (imageUri != null) {
    File file = new File(imageUri.getPath());
    RequestBody fileBody = RequestBody.create(MediaType.parse("multipart/form-data"), file);
    map.put("file"; filename="" + file.getName(), fileBody);
}

Call<UploadResponse> call = FotomateClient.getFotomateAPI().upload(authorization, map);
call.enqueue(new Callback<UploadResponse>() {
    @Override
    public void onResponse(Response<UploadResponse> response) {
        if (response != null)
            if (response.body() != null)
                if (response.body().getCode() != null)
                    System.out.println(response.body().getCode());
        pd.dismiss();
        if (response.body().isSuccess()) {
            postCart("Bearer " + fm.getAccessToken(), response.body().getCode(), qty);
            dbHelper.deleteImage(id);

        }
    }

    @Override
    public void onFailure(Throwable t) {
        t.printStackTrace();
    }
});
}