Android開發之okhttp圖檔上傳

private void uploadImg(String uploadUrl, File file, final String fileId) {
        okhttp3.MediaType mediaType = okhttp3.MediaType.parse("application/octet-stream");
        RequestBody requestBody = RequestBody.create(mediaType, file);
        WpkWyzeService.getInstance(AppConfig.ApiKey)
                .put(uploadUrl)
                .requestBody(requestBody)
                .build()
                .execute(new StringCallback() {
                    @Override
                    public void onError(Call call, Exception e, int i) {
                    }

                    @Override
                    public void onResponse(String response, int i) {
                        WpkLogUtil.e("列印上傳圖檔傳回", response + "--");
                        //圖檔上傳成功擷取圖檔link
                    }
                });
    }