我正在使用 Retrofit 将图像上传到我的服务器。在这里，我需要为一个键上传多个图像。我已经尝试过使用 Postman 网络客户端，它运行良好。这是截图。

这里是请求的键值对。
调查图像:[file1,file2,file3];
属性图像:文件
DRA:jsonBody

我尝试对 Retrofit 做同样的事情。但图片没有上传到服务器。这是我的代码。
WebServicesAPI.java

public interface WebServicesAPI {
    @Multipart
    @POST(WebServices.UPLOAD_SURVEY)
    Call<UploadSurveyResponseModel> uploadSurvey(@Part MultipartBody.Part surveyImage, @Part MultipartBody.Part propertyImage, @Part("DRA") RequestBody dra);
}

这是上传文件的方法。

 private void requestUploadSurvey() {
        File propertyImageFile = new File(surveyModel.getPropertyImagePath());
        RequestBody propertyImage = RequestBody.create(MediaType.parse("image/*"), propertyImageFile);
        MultipartBody.Part propertyImagePart = MultipartBody.Part.createFormData("PropertyImage", propertyImageFile.getName(), propertyImage);
        JSONObject requestBody = getRequestBody();
        RequestBody draBody = null;
        try {
            draBody = RequestBody.create(MediaType.parse("text/plain"), requestBody.toString(1));
            Log.d(TAG, "requestUploadSurvey: RequestBody : " + requestBody.toString(1));
        } catch (JSONException e) {
            e.printStackTrace();
        }
        MultipartBody.Builder builder = new MultipartBody.Builder();
        builder.setType(MultipartBody.FORM);
        MultipartBody surveyImage = null;

            for (SurveyModel.PictureModel model : surveyModel.getPicturesList()) {
                File file = new File(model.getImagePath());
                builder.addFormDataPart("SurveyImage", file.getName(),
                        RequestBody.create(MediaType.parse("image/*"), file));
            }
            surveyImage = builder.build();

        final WebServicesAPI webServicesAPI = RetrofitManager.getInstance().getRetrofit().create(WebServicesAPI.class);
        Call<UploadSurveyResponseModel> surveyResponse = null;

            surveyResponse = webServicesAPI.uploadSurvey(MultipartBody.Part.createFormData("SurveyImage", "SurveyImage", surveyImage), propertyImagePart, draBody);

        surveyResponse.enqueue(this);

        Log.d(TAG, "requestUploadSurvey: sent the request");
    }

请帮我解决这个问题。

最佳答案

我们可以使用 MultipartBody.Part 数组将图像数组上传到单个键。 这是解决方案
WebServicesAPI

@Multipart
@POST(WebServices.UPLOAD_SURVEY)
Call<UploadSurveyResponseModel> uploadSurvey(@Part MultipartBody.Part[] surveyImage,
                                             @Part MultipartBody.Part propertyImage,
                                             @Part("DRA") RequestBody dra);

这是上传文件的方法。

private void requestUploadSurvey () {
    File propertyImageFile = new File(surveyModel.getPropertyImagePath());
    RequestBody propertyImage = RequestBody.create(MediaType.parse("image/*"),
                                                   propertyImageFile);
    MultipartBody.Part propertyImagePart = MultipartBody.Part.createFormData("PropertyImage",
                                                                             propertyImageFile.getName(),
                                                                             propertyImage);

    MultipartBody.Part[] surveyImagesParts = new MultipartBody.Part[surveyModel.getPicturesList()
                                                                               .size()];

    for (int index = 0; index <
                        surveyModel.getPicturesList()
                                   .size(); index++) {
        Log.d(TAG,
              "requestUploadSurvey: survey image " +
              index +
              "  " +
              surveyModel.getPicturesList()
                         .get(index)
                         .getImagePath());
        File file = new File(surveyModel.getPicturesList()
                                        .get(index)
                                        .getImagePath());
        RequestBody surveyBody = RequestBody.create(MediaType.parse("image/*"),
                                                    file);
        surveyImagesParts[index] = MultipartBody.Part.createFormData("SurveyImage",
                                                                     file.getName(),
                                                                     surveyBody);
    }

    final WebServicesAPI webServicesAPI = RetrofitManager.getInstance()
                                                         .getRetrofit()
                                                         .create(WebServicesAPI.class);
    Call<UploadSurveyResponseModel> surveyResponse = null;
    if (surveyImagesParts != null) {
        surveyResponse = webServicesAPI.uploadSurvey(surveyImagesParts,
                                                     propertyImagePart,
                                                     draBody);
    }
    surveyResponse.enqueue(this);
}

关于android - 改造将多个图像上传到单个 key ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39866676/