JSONObject.put string method adding extra \ character to JSON String
android, json
Solution
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 (......) {}
}
Problem
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) ```