JSONObject.put string method adding extra \ character to JSON String

Question

I have a json string which has pid, name, price as elements. I'm displaying it in logcat. But this string changes as i use the put method to add a json string to json object. When i print the json object '\' charcater is added to every key value pair. I'm not able to figure out what is actually causing the problem.

json is a plain string and jObj is JSONObject.

My logcat details are:

json = {"products":[{"pid":"14","name":"zxc","price":"123456"},{"pid":"6","name":"Sony Xperia","price":"35000"},{"pid":"8","name":"Samsung Galaxy Note","price":"32000"},{"pid":"5","name":"htc","price":"26326"},{"pid":"9","name":"Nokia Lumia 800","price":"18000"},{"pid":"2","name":"iphone","price":"12345"},{"pid":"15","name":"sdjnas","price":"12243"},{"pid":"13","name":"Samsung S5222","price":"6500"},{"pid":"11","name":"Nokia C201","price":"4400"},{"pid":"7","name":"Nokia Asha 200","price":"4000"},{"pid":"1","name":"htc","price":"1234"},{"pid":"3","name":"htc","price":"1234"},{"pid":"4","name":"htc","price":"1234"},{"pid":"10","name":"aks","price":"1234"},{"pid":"12","name":"asd","price":"123"}],"success":1}

After writing the following line of code :

jObj.put("details", json);

An extra character '\' is added.

json object = {"details":"{\"products\":[{\"pid\":\"14\",\"name\":\"zxc\",\"price\":\"123456\"},{\"pid\":\"6\",\"name\":\"Sony Xperia\",\"price\":\"35000\"},{\"pid\":\"8\",\"name\":\"Samsung Galaxy Note\",\"price\":\"32000\"},{\"pid\":\"5\",\"name\":\"htc\",\"price\":\"26326\"},{\"pid\":\"9\",\"name\":\"Nokia Lumia 800\",\"price\":\"18000\"},{\"pid\":\"2\",\"name\":\"iphone\",\"price\":\"12345\"},{\"pid\":\"15\",\"name\":\"sdjnas\",\"price\":\"12243\"},{\"pid\":\"13\",\"name\":\"Samsung S5222\",\"price\":\"6500\"},{\"pid\":\"11\",\"name\":\"Nokia C201\",\"price\":\"4400\"},{\"pid\":\"7\",\"name\":\"Nokia Asha 200\",\"price\":\"4000\"},{\"pid\":\"1\",\"name\":\"htc\",\"price\":\"1234\"},{\"pid\":\"3\",\"name\":\"htc\",\"price\":\"1234\"},{\"pid\":\"4\",\"name\":\"htc\",\"price\":\"1234\"},{\"pid\":\"10\",\"name\":\"aks\",\"price\":\"1234\"},{\"pid\":\"12\",\"name\":\"asd\",\"price\":\"123\"}],\"success\":1}\n"}

Addition of backslashes is causiing problem in getting the string. JSONException no value for success is shown in logcat :

JSONObject json = null;

List<NameValuePair> params = new ArrayList<NameValuePair>();
        JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);

        Log.d("All Products: ", json.toString());

        try
        {
            int success = json.getInt("success");

            if (success == 1)
            {
                products = json.getJSONArray(TAG_PRODUCTS);

                for (int i = 0; i < products.length(); i++)
                {
                    JSONObject c = products.getJSONObject(i);

                    String id = c.getString(TAG_PID);
                    String name = c.getString(TAG_NAME);

                    HashMap<String, String> map = new HashMap<String, String>();

                    map.put(TAG_PID, id);
                    map.put(TAG_NAME, name);

                    productsList.add(map);
                }
            }
            else
            {
                Intent i = new Intent(getApplicationContext(), NewProductActivity.class);
                i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(i);
            }
        }
        catch (JSONException e)
        {
            e.printStackTrace();
        }

The logcat is :

05-29 15:54:21.772: W/ThrottleService(91): unable to find stats for iface rmnet0
05-29 15:54:26.192: I/ActivityManager(91): START {cmp=com.example.androidhive/.AllProductsActivity} from pid 588
05-29 15:54:26.192: W/WindowManager(91): Failure taking screenshot for (180x300) to layer 21010
05-29 15:54:26.502: I/WindowManager(91): createSurface Window{415a5d70 com.example.androidhive/com.example.androidhive.AllProductsActivity paused=false}: DRAW NOW PENDING
05-29 15:54:26.543: I/WindowManager(91): createSurface Window{415b8c88     com.example.androidhive/com.example.androidhive.AllProductsActivity paused=false}: DRAW NOW     PENDING
05-29 15:54:27.002: I/ARMAssembler(35): generated scanline__00000077:03010104_00008001_00000000 [ 89 ipp] (110 ins) at [0x41e00670:0x41e00828] in 1129891 ns
05-29 15:54:27.202: I/ActivityManager(91): Displayed com.example.androidhive/.AllProductsActivity: +980ms
05-29 15:54:27.472: D/dalvikvm(588): GC_CONCURRENT freed 125K, 3% free 10212K/10439K, paused 5ms+4ms
05-29 15:54:27.853: I/JSONPArser.java(588): json = {"products":    [{"pid":"14","name":"zxc","price":"123456"},{"pid":"6","name":"Sony Xperia","price":"35000"},{"pid":"8","name":"Samsung Galaxy Note","price":"32000"},{"pid":"5","name":"htc","price":"26326"},{"pid":"9","name":"Nokia Lumia 800","price":"18000"},{"pid":"2","name":"iphone","price":"12345"},{"pid":"15","name":"sdjnas","price":"12243"},{"pid":"13","name":"Samsung S5222","price":"6500"},{"pid":"11","name":"Nokia C201","price":"4400"},{"pid":"7","name":"Nokia Asha 200","price":"4000"},{"pid":"1","name":"htc","price":"1234"},{"pid":"3","name":"htc","price":"1234"},{"pid":"4","name":"htc","price":"1234"},{"pid":"10","name":"aks","price":"1234"},{"pid":"12","name":"asd","price":"123"}],"success":1}
05-29 15:54:27.892: I/JSONPArser.java(588): json object = {"details":"{\"products\":[{\"pid\":\"14\",\"name\":\"zxc\",\"price\":\"123456\"},{\"pid\":\"6\",\"name\":\"Sony Xperia\",\"price\":\"35000\"},{\"pid\":\"8\",\"name\":\"Samsung Galaxy Note\",\"price\":\"32000\"},{\"pid\":\"5\",\"name\":\"htc\",\"price\":\"26326\"},{\"pid\":\"9\",\"name\":\"Nokia Lumia 800\",\"price\":\"18000\"},{\"pid\":\"2\",\"name\":\"iphone\",\"price\":\"12345\"},{\"pid\":\"15\",\"name\":\"sdjnas\",\"price\":\"12243\"},{\"pid\":\"13\",\"name\":\"Samsung S5222\",\"price\":\"6500\"},{\"pid\":\"11\",\"name\":\"Nokia C201\",\"price\":\"4400\"},{\"pid\":\"7\",\"name\":\"Nokia Asha 200\",\"price\":\"4000\"},{\"pid\":\"1\",\"name\":\"htc\",\"price\":\"1234\"},{\"pid\":\"3\",\"name\":\"htc\",\"price\":\"1234\"},{\"pid\":\"4\",\"name\":\"htc\",\"price\":\"1234\"},{\"pid\":\"10\",\"name\":\"aks\",\"price\":\"1234\"},{\"pid\":\"12\",\"name\":\"asd\",\"price\":\"123\"}],\"success\":1}\n"}
05-29 15:54:27.892: I/JSONPArser.java(588): Line 27
05-29 15:54:27.902: I/JSONPArser.java(588): Line 30
05-29 15:54:27.902: D/All Products:(588): {"details":"{\"products\":[{\"pid\":\"14\",\"name\":\"zxc\",\"price\":\"123456\"},{\"pid\":\"6\",\"name\":\"Sony Xperia\",\"price\":\"35000\"},{\"pid\":\"8\",\"name\":\"Samsung Galaxy Note\",\"price\":\"32000\"},{\"pid\":\"5\",\"name\":\"htc\",\"price\":\"26326\"},{\"pid\":\"9\",\"name\":\"Nokia Lumia 800\",\"price\":\"18000\"},{\"pid\":\"2\",\"name\":\"iphone\",\"price\":\"12345\"},{\"pid\":\"15\",\"name\":\"sdjnas\",\"price\":\"12243\"},{\"pid\":\"13\",\"name\":\"Samsung S5222\",\"price\":\"6500\"},{\"pid\":\"11\",\"name\":\"Nokia C201\",\"price\":\"4400\"},{\"pid\":\"7\",\"name\":\"Nokia Asha 200\",\"price\":\"4000\"},{\"pid\":\"1\",\"name\":\"htc\",\"price\":\"1234\"},{\"pid\":\"3\",\"name\":\"htc\",\"price\":\"1234\"},{\"pid\":\"4\",\"name\":\"htc\",\"price\":\"1234\"},{\"pid\":\"10\",\"name\":\"aks\",\"price\":\"1234\"},{\"pid\":\"12\",\"name\":\"asd\",\"price\":\"123\"}],\"success\":1}\n"}
05-29 15:54:27.933: W/System.err(588): org.json.JSONException: No value for success
05-29 15:54:27.933: W/System.err(588):  at org.json.JSONObject.get(JSONObject.java:354)
05-29 15:54:27.933: W/System.err(588):  at org.json.JSONObject.getInt(JSONObject.java:443)
05-29 15:54:27.942: W/System.err(588):  at com.example.androidhive.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:110)
05-29 15:54:27.942: W/System.err(588):  at com.example.androidhive.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:1)
05-29 15:54:27.973: W/System.err(588):  at android.os.AsyncTask$2.call(AsyncTask.java:264)
05-29 15:54:27.973: W/System.err(588):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
05-29 15:54:27.973: W/System.err(588):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
05-29 15:54:27.973: W/System.err(588):  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
05-29 15:54:27.973: W/System.err(588):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
05-29 15:54:27.982: W/System.err(588):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
05-29 15:54:27.982: W/System.err(588):  at java.lang.Thread.run(Thread.java:856)

@Sufian no it wasn't. I have directly pasted here the value of jObj. — Akshay Soam
– Akshay Soam, Commented May 29, 2014 at 9:43
Hint: character escape: en.wikipedia.org/wiki/Escape_character — Marcin Orlowski
– Marcin Orlowski, Commented May 29, 2014 at 9:43

Emanuel · Accepted Answer · 2014-05-29 10:36:21Z

6

JSONObject jsonObj = new JSONObject(json);

jsonObj.get("products");

JSONObject newJsonObj = new JSONObject();
newJsonObj.put("whatever", jsonObj.get("products"));

If you want to keep the json without escaping you need to add the jsonObject to an JsonArray.

JSONArray jsonArray = new JSONArray();
jsonArray.put(jsonObj);

and get it back later with

for (int i = 0; i < jsonArray.length(); i++)  { 
    JSONObject jsonObj = jsonArray.getJSONObject(i); 
 // then you can start filtering out the array.
    if (jsonObj.has("products")) {
         JSONArray nJsonArray = new JSONArray(jsonObj.get("products"));
          for (......) {} 
}

edited May 29, 2014 at 10:36

answered May 29, 2014 at 10:31

Emanuel

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3 Comments

Sufian Over a year ago

@AkshaySoam did you replace jParser.makeHttpRequest() line? I'm curious about the type of jParser. Please state.

Akshay Soam Over a year ago

@Sufian no actually i was receiving the json object in another android activity. I just passed the json string as an argument at the time of declaration in the first activity and then tried getting the "success" and it worked... :)

Sufian Over a year ago

@AkshaySoam didn't get what you mean, but it's good that you've fixed the issue. :)

DDsix · Accepted Answer · 2014-05-29 09:43:41Z

0

That is a functional, good JSONobject. I created one with Cocoa JSON editor and there was no error. I don't know what it adds those backslashes, but I can tell you it's okey

answered May 29, 2014 at 9:43

DDsix

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2 Comments

Akshay Soam Over a year ago

but i have problem getting the values. For example the compiler says there's no value for "success" but you can see it is present at the last of the string but with an extra slash. So i have a problem retreiving string from it.

Sufian Over a year ago

@AkshaySoam please post the code where you are accessing "success".

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