Question

我正在使用volley进行json解析。我想使用POST向服务器端发送一些数据。我想发送。现在任何人都可以告诉我如何将过滤器阵列发送到服务器？

以下是我的代码段。我也尝试了Hashmap和Jsonobject。但是得到了这个错误。

错误：

org.json.JSONException: Value  at Data of type java.lang.String cannot be converted to JSONObject

格式

{
    "typeName": "MANUFACTURER",
    "typeId": 22,
    "cityId": 308,
    "sortBy": "productname",
    "sortOrder": "desc",
    "filter":[
                {
                    "filterId":101,
                    "typeName":"CAT_ID",

                     "filterId":102,
                    "typeName":"CAT_ID"
                }
             ]
}

代码检查贴纸

https://pastebin.com/u5qD8e2j

Answer 1

如果您在调用API时遇到问题，那么这将对您有所帮助。

RequestQueue queue = Volley.newRequestQueue(this);
JsonObjectRequest jobReq = new JsonObjectRequest(Request.Method.POST, url, jObject,
        new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject jsonObject) {

            }
        },
        new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {

            }
        });

queue.add(jobReq);

其中jObject是您要发送到服务器的JSON数据。

JSONArray的实现类似。而不是JsonObjectRequest 使用JsonArrayRequest并发送jArray而不是jObject。

为了创建json数组，只需做一点调整

JSONArray array=new JSONArray();

for(int i=0;i<filter_items.size();i++){
    JSONObject obj=new JSONObject();
    try {
        obj.put("filterId",filter_items.get(i));
        obj.put("typeName","CAT_ID");
    } catch (JSONException e) {
        e.printStackTrace();
    }
    array.put(obj);
}

最后添加json数组，如下所示

jsonParams.put("filter",array);

在您的情况下，您将Json数组转换为字符串

Answer 2

{
"typeName": "MANUFACTURER",
"typeId": 22,
"cityId": 308,
"sortBy": "productname",
"sortOrder": "desc",
"filter":[
            {
                "filterId":101,
                "typeName":"CAT_ID",
             }
             {
                 "filterId":102,
                "typeName":"CAT_ID"
            }
         ]
}


JSONObject object=new JSONObject();
object.put("typeName","");
object.put("typeId","");
object.put("cityId","");
object.put("sortBy","");
object.put("sortOrder","");
JSONArray array=new JSONArray();
JSONObject obj=new JSONObject();
obj.put("filterId","");
obj.put("typeName","");
array.put(obj);
object.put("filter",obj.toString());

传递JSONObject以发出请求。使用此https://www.androidhive.info/2014/09/android-json-parsing-using-volley/

Answer 3

希望这会对你有所帮助。

    //Create Main jSon object
    JSONObject jsonParams = new JSONObject();

    try {
        //Add string params
        jsonParams.put("typeName", "MANUFACTURER");
        jsonParams.put("typeId", "22");
        jsonParams.put("cityId", "308");
        jsonParams.put("sortBy", "productname");
        jsonParams.put("sortOrder", "desc");
    } catch (JSONException e) {
        e.printStackTrace();
    }
    //Create json array for filter
    JSONArray array=new JSONArray();

    //Create json objects for two filter Ids
    JSONObject jsonParam1 =new JSONObject();
    JSONObject jsonParam2 =new JSONObject();

    try {

        jsonParam1.put("filterId","101");
        jsonParam1.put("typeName","CAT_ID");

        jsonParam2.put("filterId","102");
        jsonParam2.put("typeName","CAT_ID");
    } catch (JSONException e) {
        e.printStackTrace();
    }

    //Add the filter Id object to array
    array.put(jsonParam1);
    array.put(jsonParam2);

    //Add array to main json object
    try {
        jsonParams.put("filter",array);
    } catch (JSONException e) {
        e.printStackTrace();
    }

有关如何创建json对象的更多信息，请查看此链接

Android JSONObject : add Array to the put method

修改：

如果有更多数据，最好使用Gson转换器

http://www.vogella.com/tutorials/JavaLibrary-Gson/article.html

另外，对于创建pojo类，请使用此

http://www.jsonschema2pojo.org/

Answer 4

您好Volley不支持JsonArray请求更好地使用其他一些库...

Answer 5

我使用下面的代码将JSONArray发布到排球。您必须使用JsonArrayRequest并直接传递JSON数组，而不将其添加到任何JSONObject。还要记住覆盖“parseNetworkResponse”方法以再次将响应转换为JSONArray，因为JsonArrayRequest的ResponseListner需要一种类型的JSONArray

    String URL = "www.myposturl.com/data";

    RequestQueue queue = Volley.newRequestQueue(this);

    //Create json array for filter
    JSONArray array = new JSONArray();

    //Create json objects for two filter Ids
    JSONObject jsonParam = new JSONObject();
    JSONObject jsonParam1 = new JSONObject();

    try {
        //Add string params
        jsonParam.put("NAME", "XXXXXXXXXXXXXX");
        jsonParam.put("USERNAME", "XXXXXXXXXXXXXX");
        jsonParam.put("PASSWORD", "XXXXXXXXXXXX");
        jsonParam1.put("NAME", "XXXXXXXXXXXXXX");
        jsonParam1.put("USERNAME", "XXXXXXXXXXXXXX");
        jsonParam1.put("PASSWORD", "XXXXXXXXXXXX");
    } catch (JSONException e) {
        e.printStackTrace();
    }

    array.put(jsonParam);
    array.put(jsonParam1);
    JsonArrayRequest request_json = new JsonArrayRequest(Request.Method.POST, URL, array,
            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {
                    //Get Final response
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError volleyError) {
            VolleyLog.e("Error: ", volleyError.getMessage());

        }
    }) {
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String, String> headers = new HashMap<String, String>();
            // Add headers
            return headers;
        }
        //Important part to convert response to JSON Array Again
        @Override
        protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
            String responseString;
            JSONArray array = new JSONArray();
            if (response != null) {

                try {
                    responseString = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
                    JSONObject obj = new JSONObject(responseString);
                    (array).put(obj);
                } catch (Exception ex) {
                }
            }
            //return array;
            return Response.success(array, HttpHeaderParser.parseCacheHeaders(response));
        }
    };
    queue.add(request_json);

Answer 6

遵循以下三个步骤应该可以使缺少此支持的旧Volley库正常工作。

准备有效载荷并发布：

                    JSONArray payloadItems = new JSONArray();

              JSONObject payloadItem1=new JSONObject();
             //set properties on item1
             payloadItem1.put('prop1',"val11");

              payloadItems.put(payloadItem1);

             JSONObject payloadItem2=new JSONObject();
             //set properties on item1
             payloadItem2.put('prop1',"val12");

             payloadItems.put(payloadItem1);


             JsonArrayRequest request;

             request = new JsonArrayRequest(Request.Method.POST,url,payloadItems, new Response.Listener<JSONArray>() {
                @SuppressWarnings("unchecked")
                @Override
                public void onResponse(JSONArray response) {
                    //your logic to handle response
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    //your logic to handle error
                }
            }) {

                public Map<String, String> getHeaders() throws AuthFailureError {
                    Map<String,String> params = new HashMap<String, String>();
                    /* This is very important to pass along */
                    params.put("Content-Type","application/json");
                    //other headers if any
                    return params;
                }

                 };




                request.setRetryPolicy(new DefaultRetryPolicy(10000, 2, 2));
                VolleyHelper.init(this);
                VolleyHelper.getRequestQueue().add(request);

[如果需要]如果尚未在Volley包的Class- JsonArrayRequest中添加此构造函数，则

  public JsonArrayRequest(int method, String url, JSONArray jsonArray, Listener<JSONArray> listener, ErrorListener errorListener) {
    super(method, url, (jsonArray == null) ? null : jsonArray.toString(),
            listener, errorListener);

}

[如果需要]如果尚未实现以支持服务器的JSONArray响应，则重写此方法。

 @Override
 protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
     String responseString;
     JSONArray array = new JSONArray();
     if (response != null) {

         try {
             responseString = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
             JSONObject obj = new JSONObject(responseString);
             (array).put(obj);
         } catch (Exception ex) {
         }
     }
     //return array;
     return Response.success(array, HttpHeaderParser.parseCacheHeaders(response));
 }

如何在volley中发送json数组作为post请求？

6 个答案: