I have to parse api about cryptocurrency exchange. It includes cryptocurrency named "TRUE", and makes JSONException. Well... JSONObject cognize "TRUE" as Boolean data. 😂 JSONObject have probably seen "TRUE=" as a comparison of Boolean values. That makes me seriously laugh, and was very funny but obviously is problem I have to solve. How to parse Json having "TRUE" as key name? It's okay if solution is using Gson.
https://api.bithumb.com/public/ticker/ALL_KRW
This is API link.
String s= "
"TRUE" : {
"opening_price":"394.4"
}
"
JSONObject jsonObject = new JSONObject("{" + s +"}");
Log.d("JSON",jsonObject.getJSONObject("TRUE").getString("opening_price"));
Related
{
"id": "1",
"name": "test1",
"data_city": "a:35: {i:22;s:6:\"61,800\";i:23;s:6:\"61,800\";i:24;s:6:\"61,800\";i:25;s:6:\"61,800\" ;i:26;s:6:\"61,800\";i:27;s:6:\"61,800\";i:28;s:6:\"61,800\";i:29;s:6:\"61,800\";i:30;s:6:\"61,800\";i:31;s:6:\"61,800\";i:54;s:6:\"61,800\";i:16;s:6:\"61,800\";i:32;s:6:\"61,800\";i:52;s:6:\"61,800\";i:21;s:6:\"61,800\";i:33;s:6:\"61,800\";i:37;s:6:\"61,800\";i:34;s:6:\"61,800\";i:36;s:6:\"61,800\";i:38;s:6:\"61,800\";i:41;s:6:\"61,800\";i:35;s:6:\"61,800\";i:39;s:6:\"61,800\";i:40;s:6:\"61,800\";i:42;s:6:\"61,800\";i:44;s:6:\"61,800\";i:43;s:6:\"61,800\";i:46;s:6:\"61,800\";i:45;s:6:\"61,800\";i:47;s:6:\"61,800\";i:49;s:6:\"61,800\";i:53;s:6:\"61,800\";i:50;s:6:\"61,800\";i:48;s:6:\"61,800\";i:51;s:6:\"61,800\";}"
}
This is my json response
i need to get data from string data_city
First of all, your JSON is not valid - probably a copy paste error.
Anyway, there are several ways to do this. One option is to use the built in JSONObject type:
String jsonString = "YOUR_JSON_STRING";
JSONObject objJSON = new JSONObject(jsonString);
String dataCity = objJSON.getString("data_city");
Hope this helps. Be sure to run your JSON String through a validation tool first. This one works nicely: https://jsonformatter.curiousconcept.com/
Example JSON Page
http://maps.googleapis.com/maps/api/geocode/json?latlng=51.155455,-0.165058&sensor=true
#SuppressLint("NewApi")
public void readAndParseJSON(String in) {
try {
JSONObject reader = new JSONObject(in);
// This works and returns address
JSONArray resultArry = reader.getJSONArray("results");
String Address = resultArry.getJSONObject(1).getString("formatted_address").toString();
Log.e("Address", Address);
// Trying to get PostCode on code below - this is not working (log says no value at address components)
JSONArray postCodeArray = reader.getJSONArray("address_components");
String postCode = postCodeArray.getJSONObject(1).getString("long_name").toString();
Log.e("PostCode", postCode );
This code returns the address correctly. How can I get the post code long_name which is inside address_components?
Solution
I had to get each array, and then get the post code value.
I am using the value 7, as that is the JSONObject that has the postcode stored in the "long_name" field.
JSONObject readerJsonObject = new JSONObject(in);
readerJsonObject.getJSONArray("results");
JSONArray resultsJsonArray = readerJsonObject.getJSONArray("results");
JSONArray postCodeJsonArray = resultsJsonArray.getJSONObject(0).getJSONArray("address_components");
String postCodeString = postCodeJsonArray.getJSONObject(7).getString("long_name").toString();
Log.e("TAG", postCodeString);
Hope that helps.
reader.getJSONObject(1).getJSONArray("address_components");
Your problem is that results is a JSONArray that contains a child JSONObject composed of several children: "address_components", "formatted_address", "geometry", and "types". The result array actually contains many of these such objects, but let's focus on just the first child for now.
Look carefully at your code. With this line:
JSONArray resultArry = reader.getJSONArray("results");
You are getting the entire results. Later on, you then call the same method again:
JSONArray postCodeArray = reader.getJSONArray("address_components");
But you're asking for an "address_components" from the reader, where I do not expect you'll find anything (having already read the entire result before.) You should instead be working with the JSONArray you already got before, since it already contains the entire result.
Try something like:
JSONObject addressComponents = resultArry.getJSONObject(1).getJSONObject("address_components");
String postCode = addressComponents.getString("long_name");
Note: I don't know why you're singling out JSONObject #1 (as opposed to 0, which is the first, or any other one of them) and I also am not sure why you named the String postCode. So if I've misunderstood your intention, I apologize.
Is difficult to find the error... because all looks well. The problem maybe can exist when you make the json.put("address_components", something);
So my advice is put a breakpoint at this line
JSONArray postCodeArray = reader.getJSONArray("address_components");
o display the json in logcat
Log.d("Simple", reader.toString());
Then Paste your json in this web page to view more pretty
http://jsonviewer.stack.hu/
and check if all keys are stored well.
Solution
Need to get each array, and then get the post code value. The value 7 is used, as that is the JSONObject that has the postcode stored in the "long_name" field.
JSONObject readerJsonObject = new JSONObject(in);
readerJsonObject.getJSONArray("results");
JSONArray resultsJsonArray = readerJsonObject.getJSONArray("results");
JSONArray postCodeJsonArray = resultsJsonArray.getJSONObject(0).getJSONArray("address_components");
String postCodeString = postCodeJsonArray.getJSONObject(7).getString("long_name").toString();
Log.e("TAG", postCodeString);
Hope that helps.
I want to parse my Json array dynamically. and want to get array of KEYS for each element under jsonarray. i an getting this through iterator. but not getting the sequeance as per the output json formate.
my JSON Formate :
{
"result": "Success",
"AlertDetails": [
{
"ShipmentNumber": "SHP34",
"Customer": "BEST",
"DateCreated": "2012-08-29T04:59:18Z"
"CustomerName": "BEST"
},
{
"ShipmentNumber": "SHP22",
"Customer": "BEST",
"DateCreated": "2012-08-29T05:34:18Z"
"CustomerName": "Jelly"
}
]
}
here is My Code :
JSONArray array = jsonobject.getJSONArray("AlertDetails");
JSONObject keyarray = array.getJSONObject(0);
Iterator temp = keyarray.keys();
while (temp.hasNext()) {
String curentkey = (String) temp.next();
KEYS.add(curentkey);
}
Log.d("Parsing Json class", " ---- KEYS---- " + KEYS);
What i am getting in logcate output:
---- KEYS---- [DateCreated,CustomerName, Customer, ShipmentNumber]
What i want :
---- KEYS---- [ShipmentNumber, Customer, DateCreated,CustomerName]
The JSONObject documentation (link: http://developer.android.com/reference/org/json/JSONObject.html) has the following description for the keys() function:
public Iterator keys ()
Since: API Level 1
Returns an iterator of the String names in this object. The returned
iterator supports remove, which will remove the corresponding mapping
from this object. If this object is modified after the iterator is
returned, the iterator's behavior is undefined. The order of the keys
is undefined.
So you may get the keys but the order is undefined. You may use any of the sorting algorithms if you want the keys in any particular order.
EDIT
Since you are unaware of the order of KEYS you are getting from the WS, after receiving the data you may show the details on screen in an ordered format . After building the arraylist KEYS, you may sort it alphabetically using the following:
Collections.sort(KEYS);
This will order the Strings in the KEYS arraylist according to its natural ordering (which is alphabetically).
I just come to know when I press ctlr+space bar, in which its clearly written that behavior of the keys is undefined, orders is not maintain by keys.
Arun George said# correctly that you have to use any sorting method to achieve your goal.
and for sorting may be this link will help you.
Use GSON library from google. It has a a lot of setting to read/create/parse json array and json objects. I didn't test it to find the solution, but I think it's very simple and full featured tool and can solve the problem.
Use different library to parse json dynamically.
Below I wrote a piece of code based on Jackson JSON Processor, which is the best JSON library in my opinion
public void test() throws IOException {
String str = "{\n" +
" \"result\": \"Success\",\n" +
" \"AlertDetails\": [\n" +
" {\n" +
" \"ShipmentNumber\": \"SHP34\",\n" +
" \"Customer\": \"BEST\",\n" +
" \"DateCreated\": \"2012-08-29T04:59:18Z\",\n" +
" \"CustomerName\": \"BEST\"\n" +
" }\n" +
" ]\n" +
"}";
JsonFactory factory = new JsonFactory();
JsonParser jsonParser = factory.createJsonParser(str);
JsonToken jsonToken;
SerializedString alertDetails = new SerializedString("AlertDetails");
while (!jsonParser.nextFieldName(alertDetails)) { /* move to AlertDetails field */ }
jsonParser.nextToken(); // skip [ start array
jsonParser.nextToken(); // skip { start object
// until } end object
while ((jsonToken = jsonParser.nextToken()) != JsonToken.END_OBJECT) {
if (jsonToken == JsonToken.FIELD_NAME) {
System.out.println(jsonParser.getCurrentName());
}
}
}
It simply prints out field names in the same order as in json:
ShipmentNumber
Customer
DateCreated
CustomerName
EDIT
Naturally you can use other libraries like gson etc. But remember, as is written on json.org, that:
An object is an unordered set of name/value pairs.
and the order of keys depends on implementation and might vary in each request.
There is also the method names();
Returns an array containing the string names in this object.
Edit: returns names in undefined order. Suggestions: parse it on your own
I'm trying to initialize a JSONObject with the following string, received from a web service:
"{
"campaignid": "8",
"campaignname": "Pilotarienak 2011",
"campaignlink": "http:\\/\\/www.xxx.com\\/fr\\/cote-basque\\/agenda\\/2011-05-20\\/FMAAQU064FS016DV-pilotarienak-d-anglet?fromapp",
"splash": "http:\\/\\/www.xxx.com\\/ads\\/customers\\/pilotarienak\\/320x480.jpg",
"banner": "http:\\/\\/www.xxx.com\\/ads\\/customers\\/pilotarienak\\/320x160.jpg"
}"
It seems to be valid json (it validates in jsonlint.com), but when initializing a JSONObject with that I get:
org.json.JSONException: Value of type java.lang.String cannot be converted to JSONObject
Anybody can help?
Thanks
Seems like you are trying to instantiate it from a String with extra quotes. You need to remove the wrapping quotes(I'm not using your string, but giving an example to make it clearer):
This is OK:
String jStr= "{\"param1\":\"hello\"}";
JSONObject jObj = new JSONObject(jStr);
This is not:
String jStr= "\"{\"param1\":\"hello\"}\"";
// note this ^^ and this ^^
JSONObject jObj = new JSONObject(jStr);
Try to rewrite all, in a simplified mode (just for test). I think that you put some invalid character.
Try to remove All the "\" caracters
Okay I am quering data from a Grails webservice that returns JSON. The JSON when viewed with the JSONViewer app parses fine. When I take that same string and use JSONObject(string) in my Android app I get "value of String cannot be converted to JSONObject."
Here's my JSON string
[[{"class":"mygrails.TopTen","id":491,"ttAmount":14200000,"ttMlId":402,"ttRank":1,"ttWeekId":1108},{"class":"mygrails.MovieList","id":402,"mlApproved":1,"mlApprovedId":5,"mlMovieId":"GNOMEOAN","mlReleaseDate":"2011-03-08T07:41:45Z","mlTitle":"Gnomeo and Juliet","mlWeekId":1106}]]
Now the JSON is comes from the standard JSON conversion of a SQL data using render from the groovy file through the import grails.converters.JSON.
... //(call to render JSON in the groovy file)
def a
a = Table.findAll("from someTable as st where st.id=" params.id)
render a as JSON
...
So I am not sure what I doing wrong and why the JSON looks a little off to me. (still new to JSON)
In json if you see "[]" means its a json array and if you see "{}" it is an json object. Both of then can have the other nested inside then.
In your case the string the starts with json array.
So try something like the following
String str = "[[{"class":"mygrails.TopTen","id":491,"ttAmount":14200000,"ttMlId":402,"ttRank":1,"ttWeekId":1108},{"class":"mygrails.MovieList","id":402,"mlApproved":1,"mlApprovedId":5,"mlMovieId":"GNOMEOAN","mlReleaseDate":"2011-03-08T07:41:45Z","mlTitle":"Gnomeo and Juliet","mlWeekId":1106}]]";
JSONArray jsonArray = new JSONArray(str);
jsonArray = jsonArray.getJSONArray(0);
JSONObject jsonObject = jsonArray.getJSONObject(0);
String class = jsonObject.getString("class"); // class will value "mygrails.TopTen"
Try to create an JSONArray from the String instead of JSONObject. I didn't test this but that should do the trick: you have two nested arrays that contain then actual data.
Check out your JSON online with http://jsonformat.com/
http://www.freeformatter.com/json-formatter.html
JSON Viewer
http://jsonviewer.stack.hu/
Paste your text in there and you can see what you should parse: