使用Okhttp在多部分POST中传递数组 [英] Passing arrays in multipart POST using Okhttp

问题描述

我正在构建一个需要POST正文请求中包含数组的API调用的应用程序.我正在使用OkHttp 2.6请求API.

I'm building an app that requires an API call that has array in its POST body request. I'm using OkHttp 2.6 to request for API.

邮递员中的请求如下所示:

The request in Postman looks like this:

为了达到这个目的，我尝试了几种编写RequestBody的方法，

I have tried several ways of writing RequestBody in order to achieve this,

1. 第一种方法

1. First method

RequestBody requestBody = new MultipartBuilder()
        .type(MultipartBuilder.FORM)
        .addFormDataPart("app_token", MY_TOKEN)
        .addFormDataPart("user_id", 377)
        .addFormDataPart("group_id", String.valueOf(groupId))
        .addFormDataPart("key_id", deals.toString())
        .addFormDataPart("img", filename + ".jpg", fileBody)
        .build();

第二种方法

Second method

RequestBody requestBody = new MultipartBuilder()
        .type(MultipartBuilder.FORM)
        .addFormDataPart("app_token", MY_TOKEN)
        .addFormDataPart("user_id", 377)
        .addFormDataPart("group_id", String.valueOf(groupId))
        .addFormDataPart("key_id[0]", "33")
        .addFormDataPart("key_id[1]", "34")
        .addFormDataPart("img[0]", filename + ".jpg", fileBody)
        .build();

第三种方法，我发现了这里.

MediaType json = MediaType.parse("application/json; charset=utf-8");
Map<String, Integer> params = new HashMap<>();
for (int i = 0; i < deals.size(); i++) {
    params.put("key_id["+i+"]", Integer.valueOf(deals.get(i).getUid()));
}
JSONObject parameter = new JSONObject(params);
RequestBody theBody = RequestBody.create(json, parameter.toString());


RequestBody requestBodyyy = new MultipartBuilder()
        .type(MultipartBuilder.FORM)
        .addFormDataPart("app_token", MY_TOKEN)
        .addFormDataPart("user_id", 377)
        .addFormDataPart("group_id", String.valueOf(groupId))
        .addPart(theBody)
        .addFormDataPart("img[0]", filename + ".jpg", fileBody)
        .build();

但是，它们都不起作用.

But, none of them are working.

这样做的正确方法是什么?我还需要数组大小是动态的，因为我没有传递静态数组.

What is the correct way of doing this? I also need the array size to be dynamic as I'm not passing a static one.

推荐答案

我正在使用Retrofit和Gson

I am using Retrofit and Gson

private class AddImageAsyncTask extends AsyncTask<Void, Imageuploadpojo, Imageuploadpojo> {


        ApiCall a;
        String path1,path2;

        private AddImageAsyncTask(View vs, String path1,String path2) {
            this.vs = vs;
            this.path1 = path1;
             this.path2 = path2;         
            a = retrofit2.create(ApiCall.class);
        }



        @Override
        protected Imageuploadpojo doInBackground(Void... params) {
            Map<String, RequestBody> typedfile = new HashMap<String, RequestBody>();
            File f = new File(path1);
             File f2 = new File(path2);
            if (f.exists()) {
                RequestBody requestFile =
                        RequestBody.create(MediaType.parse("multipart/form-data"), f);
                String filename = f.getName();
                typedfile.put("fileToUpload" + "\"; filename=\"" + filename, requestFile);
                //   typedfile.put("img[0]" + count, requestFile);
            }
              if (f2.exists()) {
                RequestBody requestFile =
                        RequestBody.create(MediaType.parse("multipart/form-data"), f2);
                String filename = f.getName();
                typedfile.put("fileToUpload" + "\"; filename=\"" + filename, requestFile);
                //   typedfile.put("img[1]" + count, requestFile);
            }

            // asynchronous
            // Create a call instance for looking up Retrofit contributors.
            Call<Imageuploadpojo> call = a.ImageCall(typedfile);
            // Fetch and print a list of the contributors to the library.
            Imageuploadpojo c = null;
            try {
                c = call.execute().body();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return c;
        }

        @Override
        protected void onPostExecute(Imageuploadpojo c) {
            super.onPostExecute(c);

        }
    }

看到这个，你就会明白.或尝试翻新

See this you can get idea. Or try it in retrofit

代码已更新:

    //Create Hashmap:

         Map<String, RequestBody> typedfile = new HashMap<String, RequestBody>();

    //Add your file path

     File f2 = new File(path2);

    //Check the file is exist or not
     if (f2.exists()) {
    //Then Create RequestBody add file in second perameter
    RequestBody requestFile =
                            RequestBody.create(MediaType.parse("multipart/form-data"), f2);

      typedfile.put("img[1]" + "\"; filename=\"" + filename, requestFile);
//"img[1]" is parameter

这篇关于使用Okhttp在多部分POST中传递数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！