Send a Json array POST request with android using volley

问题

i am developing application in which i send data to server using volley now i want to send data to server in json array but not know how to send in array??

    Map<String, String> postParam = new HashMap<String, String>();

    postParam.put("Token", "U2FsdGVkX13CFEM=");
    postParam.put("AppDB", "day");
    postParam.put("ContentTypeName", "Users");



    JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST,
            AppConfig.URL_REGISTER_WITHOUT_IMG, new JSONObject(postParam),
            new Response.Listener<JSONObject>() {

                @Override
                public void onResponse(JSONObject response) {
                    Log.d(TAG, response.toString());
                    //     msgResponse.setText(response.toString());
                    //  hideProgressDialog();
                }
            }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
            // hideProgressDialog();
        }
    }) {

        /**
         * Passing some request headers
         * */
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            HashMap<String, String> headers = new HashMap<String, String>();
            headers.put("Content-Type", "application/json; charset=utf-8");
            return headers;
        }
    };

    jsonObjReq.setTag(TAG);
    // Adding request to request queue
    Volley.newRequestQueue(this).add(jsonObjReq);

}

now i want to send data in array expected json { "AppDb":"day", "ContentTypeName":"Users", "Token":"U2FsdGVkX13CFEM=", "FilterData":[ {"FilterName":"EmailId","FilterValue":" Pass the user enter email here to check"} ]

}

回答1:

Try this:

JSONArray jsonArray=new JSONArray();
JSONObject jsonObj=new JSONObject();
try {
    jsonObj.put("filterName","EmailId");
    jsonObj.put("FilterValue",// user email);
} catch (JSONException e) {
    e.printStackTrace();
}
jsonArray.put(jsonObj);

Add it to your params like this:

postParam.put("FilterData",jsonArray);

回答2:

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

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() { @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;
}

 };
```

[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);

}

[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));
 }

来源：https://stackoverflow.com/questions/52131382/send-a-json-array-post-request-with-android-using-volley

标签

android

arrays

json

android-volley