John John - 4 months ago 10
JSON Question

how to send json object to server using volley in andorid


I want to send the JSONObject to server using POST method . I have used volley library to pass the string params its working fine, but if i try to use json object its showing an error for calling the json object here is my code


private void makeJsonObjReq() {
showProgressDialog();
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,
Const.URL_LOGIN, null,
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;
}

@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("un", "xyz@gmail.com");
params.put("p", "somepasswordhere");
return params;
}

};

// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq,tag_json_obj);

// Cancelling request
// ApplicationController.getInstance().getRequestQueue().cancelAll(tag_json_obj);
}



And my Error form server is :
[10031] BasicNetwork.performRequest: Unexpected response code 401



How to solve this problem. I want to add
application/json;charset=utf-8
in header please check my code whether its correct or not . Please give me a suggestion to over come this problem

Answer

Third parameter in JsonObjectRequest is for passing post parameters in jsonobject form. And for header you need to send two separate values one for content-type one for charset.

  private void makeJsonObjReq() {
    showProgressDialog();


            Map<String, String> postParam= new HashMap<String, String>();
            postParam.put("un", "xyz@gmail.com");
            postParam.put("p", "somepasswordhere");


    JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,
            Const.URL_LOGIN, 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;
        }



    };

    // Adding request to request queue
    AppController.getInstance().addToRequestQueue(jsonObjReq,tag_json_obj);

    // Cancelling request
    // ApplicationController.getInstance().getRequestQueue().cancelAll(tag_json_obj);       
}