How to send json array as post request in volley?

问题:

I am using volley for json parsing. I want to send some data using POST to server side. I am trying to send .Now can any one tell me that how can i send filter array to server?

Following is my snippet code. i tried also Hashmap and Jsonobject. but getting this error.

Error :

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

Format

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

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

For Code Check pastie

https://pastebin.com/u5qD8e2j

回答1:

If you are having a problem in calling the API then this will help you.

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);

where jObject is the JSON data you want to send to the server.

Implementation will be similar for JSONArray. Instead of JsonObjectRequest use JsonArrayRequest and send jArray instead of jObject.

For creating json array just do a little tweak

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);
}

And finally add json array as below

jsonParams.put("filter",array);

In your case you are converting Json array to string

回答2:

I used below code to post JSONArray to volley. You have to use JsonArrayRequest and pass the JSON Array directly without adding it to any JSONObject. Also keep in mind to Override the "parseNetworkResponse" method to convert the response to JSONArray again as The ResponseListner for JsonArrayRequest expects a type of 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);

回答3:

{
"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());

pass JSONObject to make request. use this https://www.androidhive.info/2014/09/android-json-parsing-using-volley/

回答4:

Hope this helps you.

    //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();
    }

For more information on how to create json object check this link

Android JSONObject : add Array to the put method

EDIT:

In case of more data it is better to use Gson convertor

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

Also for creating pojo classes use this

http://www.jsonschema2pojo.org/

回答5:

Hi Volley does not support JsonArray request better use some other libraries...

回答6:

Following three steps should make it work for old Volley libraries lacking this suport.

1. Prepare payload and post:

                       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);
   

2. [If Needed] Add this constructor in Class- JsonArrayRequest in Volley package if not already there

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

   }

3. [If Needed] Override this method if not yet implemented to support JSONArray response from server.

    @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));
    }