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:
{
"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3:
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4:
Hi Volley does not support JsonArray request better use some other libraries...
回答5:
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);
来源：https://stackoverflow.com/questions/46422727/how-to-send-json-array-as-post-request-in-volley