android : send json data to the Server

Question

I want to send json data to the server.

final JSONObject root = new JSONObject();
    Integer i = 0;

    for(Cart_Product cart_product : cartArraylist)

    {

        final String title = cart_product.getTitle();
        final Double price = cart_product.getPrice();
        final Integer quantity= cart_product.getCountvalue();

        try {
            root.put("id",i);
            root.put("title",title);
             root.put("price",price);
             root.put("quantity",q);
             i++;
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
      Map<String, String> postParam= new HashMap<String, String>();
    postParam.put("un", root.toString());


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

                @Override
                public void onResponse(JSONObject response) {
                    try {
                        JSONObject jsonObject = new JSONObject(response.toString());

                        Toast.makeText(getApplicationContext(),
                                jsonObject.getString("message"),
                                Toast.LENGTH_LONG).show();

                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }

            }, new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {

        }
    }) {

        /**
         * 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;
        }



    };

    MySingleton.getInstance(this).addToRequestQueue(jsonObjReq);

}

}

And here is my php code is :

$body = file_get_contents('php://input');
$postvars = json_decode($body,true);

$user = $postvars['un'];

$pass = $postvars['p'];


$response['message']=$user; 
echo json_encode($response);

This echo statement is showing the last row of data like (id:5 , title:val,price : val , quantity = val ) . I want to access one by one each row.

OR please suggest any other technique to arrange json data.

Thanks.

MJM · Accepted Answer · 2018-02-03 12:43:35Z

1

You are overwriting your data,and passing only last raw to server.You have to take a JsonArray for store all the data

JSONArray arrayRoot=new JSONArray();

 Integer i = 0;
for(Cart_Product cart_product : cartArraylist)

    {

        final JSONObject root = new JSONObject();
        final String title = cart_product.getTitle();
        final Double price = cart_product.getPrice();
        final Integer quantity= cart_product.getCountvalue();

        try {
            root.put("id",i);
            root.put("title",title);
             root.put("price",price);
             root.put("quantity",q);
             arrayRoot.put(i,root );//add JSONObject to array
             i++;
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
  postParam.put("un", arrayRoot.toString());

answered Feb 3, 2018 at 12:43

MJM

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