how to send json object to server using volley in android

Question

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", "[email protected]");
            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

Carroty

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. – Kuska

@Kuska : getParams() will be the Third parameter in JsonObjectRequest right??? and headers.put("Content-Type", "charset=utf-8"); is this right?? – Carroty

Answer 1

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.

  RequestQueue queue = Volley.newRequestQueue(this);

  private void makeJsonObjReq() {
    showProgressDialog();


            Map<String, String> postParam= new HashMap<String, String>();
            postParam.put("un", "[email protected]");
            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;
        }



    };

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

    // Cancelling request
    /* if (queue!= null) {
    queue.cancelAll(TAG);
    } */

}

Kuska

What is JsonObject class? – Photographic

@Carroty could you please send me your whole class of this volley [java file] to my email id : [email protected] , i will be very grateful to u – Nekton

am facing the same problem thats why am asking you your complete java file..THnks in advance – Nekton

@ArslanAliAwan were you are facing the problem , i have updated my code long back. explain me the problem so that i can help you – Carroty

@Carroty please check my similar question here #35068007 – Truce

in addition to this answer if you use asp web api as your api service make sure that your method argument include in the object. – Pforzheim

Answer 2

Create new Method and call it in OnClick method

public void PostOperation() {
        requestQueue = Volley.newRequestQueue(this);
        pdialog = new ProgressDialog(this);
        pdialog.setMessage("Loading");
        pdialog.show();

        StringRequest stringRequest = new StringRequest(Request.Method.POST, "YOUR_URL",
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        pdialog.dismiss();
                        Log.e("login output", response);
//MODEL CLASS
                       LoginModel loginModel = new GsonBuilder().create().fromJson(response, LoginModel.class);


                        if (loginModel.getStatus().toString().equalsIgnoreCase("true")) {


                            Intent i = new Intent(context, DashboardActivity.class);
                            startActivity(i);
                            finish();

                            Toast.makeText(context, loginModel.getStatus() + "", Toast.LENGTH_SHORT).show();
                        } else {

                            Toast.makeText(context, loginModel.getMsg() + "", Toast.LENGTH_SHORT).show();

                        }

                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        pdialog.dismiss();
                        Toast.makeText(getApplicationContext(), "Invalid Credentials", Toast.LENGTH_SHORT).show();
                    }
                }) {
            @Override
            protected Map<String, String> getParams() {
                HashMap<String, String> map = new HashMap<String, String>();

              // pass your input text

                map.put("email" editTextEmail.getText().toString()); 
                map.put("password",editTextPassword.getText().toString() );

                map.put("uid", "1"); 
                map.put("type", "login");


                Log.e("para", map + "");
                return map;
            }

        };
        requestQueue.add(stringRequest);

    }

Allard