Error parsing data org.json.JSONException: type java.lang.String cannot be converted to JSONObject

Question

Currently my PHP file that is used to interface between the MySQL server and my Android app looks like:

<?php
// array for JSON response
$response = array();

if (isset($_GET['porfileID'])) {
     $ID = $_GET['porfileID'];

    // include db connect class
    require_once __DIR__ . '/db_connect.php';

    // connecting to db
    $db = new DB_CONNECT();

    // get all products from products table
    $result = mysql_query("SELECT * FROM profiles_profilelists WHERE ProfileID = '$ID'") or die(mysql_error());

    // check for empty result
    if (mysql_num_rows($result) > 0) {
        // looping through all results
        // products node
        $response["lists"] = array();

        while ($row = mysql_fetch_array($result)) {
        // temp user array
        $lists = array();
        $lists["ProfileListID"] = $row["ProfileListID"];
        $lists["ProfileListName"] = $row["ProfileListName"];

        // push single product into final response array
        array_push($response["lists"], $lists);
        }
        // success
        $response["success"] = 1;

        // echoing JSON response
        echo json_encode($response);
    } else {
        // no products found
        $response["success"] = 0;
        $response["message"] = "No products found";

        // echo no users JSON
        echo json_encode($response);
    }
} else {
    // required field is missing
    $response["success"] = 0;
    $response["message"] = "Required field(s) is missing";

    // echoing JSON response
    echo json_encode($response);
}
?>

This works fine however when I add:

$result2 = mysql_query("SELECT * FROM profiles_profilelistitems WHERE ProfileListID = ".$row["ProfileListName"]) or die(mysql_error());

$lists["ListCount"] = mysql_num_rows($result2);

To my Php so it looks like:

<?php


// array for JSON response
$response = array();

if (isset($_GET['porfileID'])) {
     $ID = $_GET['porfileID'];

    // include db connect class
    require_once __DIR__ . '/db_connect.php';

    // connecting to db
    $db = new DB_CONNECT();

    // get all products from products table
    $result = mysql_query("SELECT * FROM profiles_profilelists WHERE ProfileID = '$ID'") or die(mysql_error());

    // check for empty result
    if (mysql_num_rows($result) > 0) {
        // looping through all results
        // products node
        $response["lists"] = array();

        while ($row = mysql_fetch_array($result)) {
        // temp user array
        $lists = array();
        $lists["ProfileListID"] = $row["ProfileListID"];
        $lists["ProfileListName"] = $row["ProfileListName"];

        $result2 = mysql_query("SELECT * FROM profiles_profilelistitems WHERE ProfileListID = ".$row["ProfileListName"]) or die(mysql_error());

        $lists["ListCount"] = mysql_num_rows($result2);

        // push single product into final response array
        array_push($response["lists"], $lists);
        }
        // success
        $response["success"] = 1;

        // echoing JSON response
        echo json_encode($response);
    } else {
        // no products found
        $response["success"] = 0;
        $response["message"] = "No products found";

        // echo no users JSON
        echo json_encode($response);
    }
} else {
    // required field is missing
    $response["success"] = 0;
    $response["message"] = "Required field(s) is missing";

    // echoing JSON response
    echo json_encode($response);
}
?>

I end up with the above error. The complete trace is:

09-03 17:05:57.836: E/JSON Parser(675): Error parsing data org.json.JSONException: Value You of type java.lang.String cannot be converted to JSONObject
09-03 17:05:59.617: E/AndroidRuntime(675): FATAL EXCEPTION: AsyncTask #1
09-03 17:05:59.617: E/AndroidRuntime(675): java.lang.RuntimeException: An error occured while executing doInBackground()
09-03 17:05:59.617: E/AndroidRuntime(675):  at android.os.AsyncTask$3.done(AsyncTask.java:299)
09-03 17:05:59.617: E/AndroidRuntime(675):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
09-03 17:05:59.617: E/AndroidRuntime(675):  at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
09-03 17:05:59.617: E/AndroidRuntime(675):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
09-03 17:05:59.617: E/AndroidRuntime(675):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
09-03 17:05:59.617: E/AndroidRuntime(675):  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
09-03 17:05:59.617: E/AndroidRuntime(675):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
09-03 17:05:59.617: E/AndroidRuntime(675):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
09-03 17:05:59.617: E/AndroidRuntime(675):  at java.lang.Thread.run(Thread.java:856)
09-03 17:05:59.617: E/AndroidRuntime(675): Caused by: java.lang.NullPointerException
09-03 17:05:59.617: E/AndroidRuntime(675):  at com.test.app.MyLists$LoadAllLists.doInBackground(MyLists.java:267)
09-03 17:05:59.617: E/AndroidRuntime(675):  at com.test.app.MyLists$LoadAllLists.doInBackground(MyLists.java:1)
09-03 17:05:59.617: E/AndroidRuntime(675):  at android.os.AsyncTask$2.call(AsyncTask.java:287)
09-03 17:05:59.617: E/AndroidRuntime(675):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
09-03 17:05:59.617: E/AndroidRuntime(675):  ... 5 more

The code that the trace links to from within the app:

protected String doInBackground(String... args) {
            // Building Parameters
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("porfileID", Integer.toString(userID)));
            // getting JSON string from URL
            JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);

            // Check your log cat for JSON reponse
            Log.d("All Products: ", json.toString());

            try {
                // Checking for SUCCESS TAG
                int success = json.getInt(TAG_SUCCESS);

                if (success == 1) {
                    // products found
                    // Getting Array of Products
                    products = json.getJSONArray("lists");
                    productsList.clear();
                    // looping through All Products
                    for (int i = 0; i < products.length(); i++) {
                        JSONObject c = products.getJSONObject(i);

                        // Storing each json item in variable
                        String id = c.getString("ProfileListID");
                        String name = c.getString("ProfileListName");
                        //String count = c.getString("ListCount");
                        // creating new HashMap
                        HashMap<String, String> map = new HashMap<String, String>();

                        // adding each child node to HashMap key => value
                        map.put("ProfileListID", id);
                        map.put("ProfileListName", name);

                        // adding HashList to ArrayList
                        productsList.add(map);
                    }
                } else {

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

            return null;
        }

And finally the json parser I am using

public class JSONParser {

    static InputStream is = null;
    static JSONObject jObj = null;
    static String json = "";

    // constructor
    public JSONParser() {

    }

    // function get json from url
    // by making HTTP POST or GET method
    public JSONObject makeHttpRequest(String url, String method,
            List<NameValuePair> params) {

        // Making HTTP request
        try {

            // check for request method
            if(method == "POST"){
                // request method is POST
                // defaultHttpClient
                DefaultHttpClient httpClient = new DefaultHttpClient();
                HttpPost httpPost = new HttpPost(url);
                httpPost.setEntity(new UrlEncodedFormEntity(params));

                HttpResponse httpResponse = httpClient.execute(httpPost);
                HttpEntity httpEntity = httpResponse.getEntity();
                is = httpEntity.getContent();

            }else if(method == "GET"){
                // request method is GET
                DefaultHttpClient httpClient = new DefaultHttpClient();
                String paramString = URLEncodedUtils.format(params, "utf-8");
                url += "?" + paramString;
                HttpGet httpGet = new HttpGet(url);

                HttpResponse httpResponse = httpClient.execute(httpGet);
                HttpEntity httpEntity = httpResponse.getEntity();
                is = httpEntity.getContent();
            }           


        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    is, "iso-8859-1"), 8);
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            json = sb.toString();
        } catch (Exception e) {
            Log.e("Buffer Error", "Error converting result " + e.toString());
        }

        // try parse the string to a JSON object
        try {
            jObj = new JSONObject(json);
        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        // return JSON String
        return jObj;

    }
}

Answer 1

If you are getting error only after introducing the PHP line then you may have error in the query itself. Try dumping the query to get more insights.

SELECT * FROM profiles_profilelistitems WHERE ProfileListID = ".$row["ProfileListName"]

should be

SELECT * FROM profiles_profilelistitems WHERE ProfileListID = '".$row["ProfileListName"]."'"

Answer 2

Problem is in php only , rewrite query or check php . I have also faced same problem , and problem is not in android or anything , it is in php only , and usually in the query . If query seems correct then also rewrite query once .