Develop Reference

Parse json from internal resource file

I am beginner, trying to parse this json from a resource file, but no success. I can read the json but not parse it.
My json:
{"kind": "response",
"columns": [
"name",
"kml_4326"
],
"rows": [
[
"Spain",
{
"geometry": {
"type": "Polygon",
"coordinates": [
[
[
61.211,
35.65,
0.0
],
[
62.231,
35.271,
0.0
],
[
62.985,
35.404,
0.0
]... etc...
My code:
try {
InputStream is = getResources().openRawResource(R.raw.bb);
Writer writer = new StringWriter();
char[] buffer = new char[1024];
try {
Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
int n;
while ((n = reader.read(buffer)) != -1) {
writer.write(buffer, 0, n);
}
} finally {
is.close();
}
try {
JSONObject aJson = new JSONObject(writer.toString());
JSONArray json = aJson.getJSONArray("rows");
for (int i = 0; i < json.length(); i++) {
JSONObject object = json.getJSONObject(i); // problem is here
JSONObject bJson = new JSONObject(object.toString());
JSONArray cJson = new JSONArray(bJson);
JSONObject object1 = cJson.getJSONObject(1);
JSONArray geometry = object1.getJSONArray("geometry");
}
}
catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
// The error: JSONArray cannot be converted to JSONObject
org.json.JSONException: Value ["Spain",{"geometry":{"type":"Polygon","coordinates":[[[61.211,35.65,0],[62.231,35.271,0],[62.985,35.404,0],[63.194,35.857,0],[63.983,36.008,0],[64.546,36.312,0],[64.746,37.112,0],[65.589,37.305,0],[65.746,37.661,0],[66.217,37.394,0],[66.519,37.363,0],[67.076,37.356,0],[67.83,37.145,0],[68.136,37.023,0],[68.859,37.344,0],[69.196,37.151,0],[69.519,37.609,0],[70.117,37.588,0],[70.271,37.735,0],[70.376,38.138,0],[70.807,38.486,0],[71.348,38.259,0],[71.239,37.953,0],[71.542,37.906,0],[71.449,37.066,0],[71.845,36.738,0],[72.193,36.948,0],[72.637,37.048,0],[73.26,37.495,0],[73.949,37.422,0],[74.98,37.42,0],[75.158,37.133,0],[74.576,37.021,0],[74.068,36.836,0],[72.92,36.72,0],[71.846,36.51,0],[71.262,36.074,0],[71.499,35.651,0],[71.613,35.153,0],[71.115,34.733,0],[71.157,34.349,0],[70.882,33.989,0],[69.931,34.02,0],[70.324,33.359,0],[69.687,33.105,0],[69.263,32.502,0],[69.318,31.901,0],[68.927,31.62,0],[68.557,31.713,0],[67.793,31.583,0],[67.683,31.303,0],[66.939,31.305,0],[66.381,30.739,0],[66.346,29.888,0],[65.047,29.472,0],[64.35,29.56,0],[64.148,29.341,0],[63.55,29.468,0],[62.55,29.319,0],[60.874,29.829,0],[61.781,30.736,0],[61.699,31.38,0],[60.942,31.548,0],[60.864,32.183,0],[60.536,32.981,0],[60.964,33.529,0],[60.528,33.676,0],[60.803,34.404,0],[61.211,35.65,0]]]}}] at 0 of type org.json.JSONArray cannot be converted to JSONObject
at org.json.JSON.typeMismatch(JSON.java:100)
at org.json.JSONArray.getJSONObject(JSONArray.java:525)
I want to parse this JSON array. How can I do this?
Can anyone please help me?
Thanks in advance.

That is some awful JSON, do you have any control of it? The problem you have arrays within arrays within arrays. Specifically your error is because "rows" is an array of arrays so you need to have an inner loop.
JSONObject aJson = new JSONObject(writer.toString());
JSONArray rowsArray = aJson.getJSONArray("rows");
for (int i = 0; i < rowsArray.length(); i++) {
JSONArray jsonArray = rowsArray.getJSONArray(i);
for(int x = 0; x < jsonArray.length(); x++){
JSONObject object = jsonArray.getJSONObject(x); // now it will be the entry for spain
JSONArray geometry = object.getJSONArray("geometry");
}
}
Coordinates is even worse because you have an array of arrays of arrays so it will require numerous loops.

Can't figure out this JSON parsing error

Currently I'm trying to display JSON data (hosted on a Webserver) in a ListView in Android. The App correctly receives the data but is unable to process it further to display it in said ListView.
The error is as follows:
JSON parsing error: Value ... of type org.json.JSONArray cannot be converted to JSONObject
The JSON data I'm trying to parse looks like the following:
[{"idBuch":1,"autor":"Erich Maria Remarque","name":"Im Westen nichts Neues","preis":20,"buchtyp":{"idBuchtyp":3,"typenamen":"Geschichte"}}]
The code that processes the received JSON-String:
try{
JSONObject jsonObject = new JSONObject(jsonStr);
JSONArray books = jsonObject.getJSONArray("book");
for(int i = 0; i < books.length(); i++){
JSONObject obj = books.getJSONObject(i);
String idBook = obj.getString("idBuch");
String author = obj.getString("autor");
String name = obj.getString("name");
String price = obj.getString("preis");
JSONObject booktype = obj.getJSONObject("buchtyp");
String idBooktype = booktype.getString("idBuchtyp");
String typename = booktype.getString("typenamen");
HashMap<String, String> book = new HashMap<>();
book.put("idBook", idBook);
book.put("author", author);
book.put("name", name);
book.put("price", price);
book.put("genre", typename);
bookList.add(book);
} }catch(final JSONException e)
I am aware of the fact that there are a lot of similar questions on this site but I still had no success regarding this issue. Thank you in advance.

The JSON that you provided only contains an array.
[
{
"idBuch": 1,
"autor": "Erich Maria Remarque",
"name": "Im Westen nichts Neues",
"preis": 20,
"buchtyp": {
"idBuchtyp": 3,
"typenamen": "Geschichte"
}
}
]
However, your code expects the root to be an object with field book.
{
"book": [
{
"idBuch": 1,
"autor": "Erich Maria Remarque",
"name": "Im Westen nichts Neues",
"preis": 20,
"buchtyp": {
"idBuchtyp": 3,
"typenamen": "Geschichte"
}
}
]
}
In this case, try replacing the line:
JSONObject jsonObject = new JSONObject(jsonStr);
with
JSONArray books = new JSONArray(jsonStr);
and proceed as normal. Your end result should look like:
try {
JSONArray books = new JSONArray(jsonStr);
for (int i = 0; i < books.length(); i++) {
JSONObject obj = books.getJSONObject(i);
String idBook = obj.getString("idBuch");
String author = obj.getString("autor");
String name = obj.getString("name");
String price = obj.getString("preis");
JSONObject booktype = obj.getJSONObject("buchtyp");
String idBooktype = booktype.getString("idBuchtyp");
String typename = booktype.getString("typenamen");
HashMap < String, String > book = new HashMap < > ();
book.put("idBook", idBook);
book.put("author", author);
book.put("name", name);
book.put("price", price);
book.put("genre", typename);
bookList.add(book);
}
} catch (final JSONException e) {
e.printStackTrace()
}

How to parse specific JSON data in Android?

This is my JSON data from a URL:
[
{ "title" : "65th Issue", "author": "అశోక్"},
{ "title" : "64th Issue", "author": "రాము" },
{ "title" : "63rd Issue", "author": "శ్రీను" }
]
It is looking like a JSONArray but it does not have its name (Array name) to access. Could anyone tell me how can I parse this JSON data in android?
Parsing Code
InputStream inputStream = connection.getInputStream();
Reader reader = new InputStreamReader(inputStream);
int contentLength = connection.getContentLength();
char [] charArray = new char[contentLength];
reader.read(charArray);
String responseData = new String(charArray);
try{
JSONArray jArray = new JSONArray(responseData);
for(int i = 0; i < jArray.length(); i++) {
String title = jArray.getJSONObject(i).getString("title");
}
} catch (JSONException e) {
Log.v(TAG, "JSON EXCEPTION");
}

String jsonString = ...; //This contains the above mentioned String.
For JSON String, [] denotes an array, an {} denotes an object. In your case, the string starts with a [] thats means its an array, so we first get the JSONArray.
JSONArray jArray = new JSONArray(jsonString);
Now, if you see, the array has multiple strings beginning and ending with {}, that means that the array has multiple objects. So we run a loop over the array length to extract each object and then the key - value from the object.
for(int i = 0; i < jArray.length(); i++) {
String title = jArray.getJSONObject(i).getString("title");
}
So, the complete code will be something like this :
String jsonString = ...; //This contains the above mentioned String.
JSONArray jArray = new JSONArray(jsonString);
for(int i = 0; i < jArray.length(); i++) {
String title = jArray.getJSONObject(i).getString("title");
}
Edit 2 :
String jsonString = "[\r\n { \"title\" : \"65th Issue\", \"author\": \"\u0C05\u0C36\u0C4B\u0C15\u0C4D\"},\r\n { \"title\" : \"64th Issue\", \"author\": \"\u0C30\u0C3E\u0C2E\u0C41\" },\r\n { \"title\" : \"63rd Issue\", \"author\": \"\u0C36\u0C4D\u0C30\u0C40\u0C28\u0C41\" }\r\n]";
try {
JSONArray jArray = new JSONArray(jsonString);
for (int i = 0; i < jArray.length(); i++) {
String title = jArray.getJSONObject(i).getString("title");
Log.d(LOGTAG, title);
}
} catch (JSONException e) {
e.printStackTrace();
}

how to access multi array json file?

this is my code below how do i acess this json file check my method it is coreect method to aces json file array and nodes? i want to acess this json file below from my code help me how do i acess this json file formmy code? i dontknow howmany array in json file
{
"status":1,
"message":"",
"data":
{
"school":
[
{
"id":3,
"name":"FG Public School"
},
{
"id":4,
"name":"Fazaia Inter College"}
]
}
}
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 15000);
HttpConnectionParams.setSoTimeout(client.getParams(), 15000);
HttpUriRequest request = new HttpGet(SelectMenuAPI);
HttpResponse response = client.execute(request);
InputStream atomInputStream =
response.getEntity().getContent();
BufferedReader in = new BufferedReader(new
InputStreamReader(atomInputStream));
String line;
String str = "";
while ((line = in.readLine()) != null){
str += line;
}
JSONObject json = new JSONObject(str);
JSONArray data = json.getJSONArray("school");
for (int i = 0; i < data.length(); i++) {
JSONObject object =
data.getJSONObject(i);
// JSONObject category =
object.getJSONObject("Category");
Category_ID.add(Long.parseLong(object.getString("id")));
Category_name.add(object.getString("name"));
Log.d("Category name",
Category_name.get(i));

Try This Code
=================================================================
try {
String[] Id,name;
JSONObject json = new JSONObject(str);
JSONObject SubString3 = json.getJSONObject("data");
Log.e(SubString3.toString(),"SubString3");
JSONArray Array = SubString3.getJSONArray("school");
Id = new String[Array.length()];
name =new String[Array.length()];
for(int i=0;i<=Array.length();i++)
{
Id[i]= Array.getJSONObject(i).getString("id");
Log.e(Id[i].toString(),"Id[i]");
name[i]= Array.getJSONObject(i).getString("name");
Log.e(name[i].toString(),"name[i]");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

The Category object is not present inside the Json file
you can try following
JSONObject json = new JSONObject("str");
JSONObject data = json.getJSONObject("data");
JSONArray school = json.getJSONArray("school");
for (int i = 0; i < data.length(); i++) {
JSONObject object = school.getJSONObject(i);
long id = Long.parseLong(object.getString("id"));
String name = object.getString("name");
JSONObject category = new JSONObject();
category.put("id");
category.put("name");
}

First you need to fetch an OBJECT of the whole JSON because it's in '{' '}'. Then you need to fetch an object again with the name "data" because it is in '{' '}'. And only then should you fetch the array named "school".
JSONObject json = new JSONObject(str);
JSONObject data = json.getJSONObject("data");
JSONArray school = data.getJSONArray("school");

How do I pull the string array from this json object?

I am trying to get a list of available numbers from the following json object, using the class from org.json
{
"response":true,
"state":1,
"data":
{
"CALLERID":"81101099",
"numbers":
[
"21344111","21772917",
"28511113","29274472",
"29843999","29845591",
"30870001","30870089",
"30870090","30870091"
]
}
}
My first steps were, after receiving the json object from the web service:
jsonObj = new JSONObject(response);
jsonData = jsonObj.optJSONObject("data");
Now, how do I save the string array of numbers?

use:
jsonObj = new JSONObject(response);
jsonData = jsonObj.optJSONObject("data");
JSONArray arrJson = jsonData.getJSONArray("numbers");
String[] arr = new String[arrJson.length()];
for(int i = 0; i < arrJson.length(); i++)
arr[i] = arrJson.getString(i);

you need to use JSONArray to pull data in an array
JSONObject jObj= new JSONObject(your_json_response);
JSONArray array = jObj.getJSONArray("data");

Assuming that you are trying to get it in a javascript block, Try something like this
var arrNumber = jsonData.numbers;

My code is for getting "data":
public void jsonParserArray(String json) {
String [] resultsNumbers = new String[100];
try {
JSONObject jsonObjectGetData = new JSONObject(json);
JSONObject jsonObjectGetNumbers = jsonObjectGetData.optJSONObject("results");
JSONArray jsonArray = jsonObjectGetNumbers.getJSONArray("numbers");
for (int i = 0; i < jsonArray.length(); i++) {
resultsNumbers[i] = jsonArray.getString(i);
}
} catch (JSONException e) {
e.printStackTrace();
Log.e(LOG_TAG, e.toString());
}
}