I'm getting error cannot convert String to json object ..
While I'm converting this String
{"user_id": "user_id: 140" };
Error getting due to the format problem?
Thanks in advance..
try this JsonObject object=new JsonObject(jsonString); your string will be converted to JsonObject.
{"user_id": "user_id: 140" };
Please make sure that your json string is true.
Example JSON String:
[{"property":"value"}, {"property":"value"}, ...]
OR
{"property":[{"property":"value"}]}
OR
...
So may be your JSON String is not correct.
You can try with (Without ";" at the end of line)
{"user_id":"140"}
If you assign user_id: 140 as value then:
{"user_id":"user_id:140"}
Please make sure that at the end of line have no ;
And, how to parse JSON String???
The first {} => Object, [] => Array
Object without name
JSONObject jObject = new JSONObject(jsonString);
Object without name but in JSONArray
JSONObject jObject = jsonArray.getJSONObject(index); // example: index = 0
Object with name and in JSONArray
JSONObject jObject = jsonArray.getJSONObject("name_of_object");
JSONArray is like JSONObject & jsonArray above is an instance of JSONArray
Related
I am trying to parse json but it gives me exception.
I hardcoded expected json as String like this
String stringJSON="[{\"value1\":\"ABC567123\",\"end_at\":\"08/28/2014 09:10:00\",\"start_at\":\"04/25/2016 09:20:00\"}]";
Valid json is like this
[
{
"value1": "ABC567123",
"end_at": "08/28/2014 09:10:00",
"start_at": "04/25/2016 09:20:00"
}
]
Now I am trying to parse json like below and getting exception.
JSONObject responseObJ;
try {
responseObJ= new JSONObject(stringJSON); //error here
if(responseObJ!=null){
//do something
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
Please suggest what to do?
//hard coded it for temporary - json result is expected to exact same
stringJSON is contains JSONArray instead of JSONObject as root element in JSON String.
Either remove [] from start and end of String according to current code or if multiple JSONObject's is available in JSONArray then get JSONArray from stringJSON :
JSONArray responseObJ= new JSONArray(stringJSON);
[ ] they show that it has an array of objects in it so you can retrieve it like this
JSONArray jsonArray= new JSONArray(stringJSON);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jObject.getJSONObject(i);
// here you can get the values of objects stored in the jsonObject
}
In your case you have only one object so you don't have to use loop instead you can get it like this
JSONArray jsonArray= new JSONArray(stringJSON);
JSONObject jsonObject = jObject.getJSONObject(0);
yes as you said its valid json but its JsonArray not JsonObject.
Just remove [] from start and end.
your string should be
String stringJSON="{\"value1\":\"ABC567123\",\"end_at\":\"08/28/2014 09:10:00\",\"start_at\":\"04/25/2016 09:20:00\"}";
or if you want to work with current string then use JsonArray instead of JsonObject
JSONArray responseObJ= new JSONArray(stringJSON);
Can you try Deserialize method of ScriptSerializer class? Like:
var scriptSerializer = new JavaScriptSerializer();
var obj = scriptSerializer.Deserialize<Object>(str);
My below android code is throwing
org.json.JSONException: Value
{"ID":1,"DisplayName":"Manish","UserName":"manish.parab#hotmail.com"}
at AuthenticateUserResult of type org.json.JSONObject cannot be
converted to JSONArray
Code:
String response = Common.ExecuteHttpRequest(Url);
JSONObject jsonObject = new JSONObject(response);
JSONArray jArray = jsonObject.getJSONArray("AuthenticateUserResult");
response is string from WCF method.
{"AuthenticateUserResult":{"DisplayName":"Manish","ID":1,"UserName":"manish.parab#hotmail.com"}}
The value of AuthenticateUserResult is a JSON Object (it's enclosed in {}).
Change that line to this
JSONObject jArray = jsonObject.getJSONObject("AuthenticateUserResult");
Then you can get your data as follows :
String displayName = jArray.getString("DisplayName");
// Etc...
There are three workarounds to solve this problem.
1.Use JsonObject. Your WCF server just give it in JsonObject.
String response = Common.ExecuteHttpRequest(Url);
JSONObject jsonObject = new JSONObject(response).getJSONObject("AuthenticateUserResult");
2.Use json array as a container
String response = Common.ExecuteHttpRequest(Url);
JSONObject jsonObject = new JSONObject(response);
JSONArray jArray = new JSONArray().put(jsonObject.getJSONObject("AuthenticateUserResult"));
3.Edit server to provide AuthenticationUserResult into json array. The right format would be as below.
{"AuthenticateUserResult":[{"DisplayName":"Manish","ID":1,"UserName":"manish.parab#hotmail.com"}]}
The exception is right, because "AuthenticateUserResult" value is declared as an element ({}) and not as an array ({}).
To fix this, use getJSONObject method to get the value of "AuthenticateUserResult", like this:
String response = Common.ExecuteHttpRequest(Url);
JSONObject jsonObject = new JSONObject(response);
JSONObject result = jsonObject.getJSONObject("AuthenticateUserResult");
After that, you can retrieve a child element, like:
String mUserName = result.getString("UserName");
I m using Eclipse and Android project. I have parsed the JSON and have contents as String. I have a JSON like:
{
"state":{
"updated":"2012-07-16T19:20:30",
"value":604,
"variables":{
"var1":12,
"var2":47,
"var3":77,
"var4":77
}
}
}
I want to add "var5":value to JSON in Android. The value could be String, decimal,array, integer etc. I want to have the updated JSON as String. Can anyone help me?
Create a new JSONObject from the String by:
String str="{
"state":{
"updated":"2012-07-16T19:20:30",
"value":604,
"variables":{
"var1":12,
"var2":47,
"var3":77,
"var4":77
}
}
}";
JSONObject jsonObject=new JSONObject(str);
now get JSONObject with key "variables" from this object by:
JSONObject variables=jsonObject.getJSONObject("variables");
to add a new value to this JSONObject use:
variables.put("var5", newValue);
now put this json object variables to jsonObject.
jsonObject.put("variables", variables);
and get This jsonObject as a String:
String strResult=jsonObject.toString();
I got the Json response. I am not able to get the values from the string.my string is
Json_response is
{"NameAllList":[{"Current":{"time":"2012-02-21T08:04:21","Name":"abcd"},
"Next":{"Name":"data1","StartTime":"2012-02-21T08:06:21"}},{"Current":{"time":"2012-02-21T08:14:21","Name":"defg"},
"Next":{"Name":"data2","StartTime":"2012-02-21T08:24:21"}},{"Current":{"time":"2012-02-21T08:28:21","Name":"ghij"},
"Next":{"Name":"data3","StartTime":"2012-02-21T08:34:21"}},{"Current":{"time":"2012-02-21T08:40:21","Name":"knmo"},
"Next":{"Name":"data4","StartTime":"2012-02-21T08:48:21"}}]}
and i tried this.
JSONObject jsonObj = new JSONObject(json_response);
JSONObject subObj = jsonObj.getJSONObject("Current");
String name_current =subObj.getString("Name");
but i am not able to get the value of "Name". what mistake i have done. provide the link to do the above parsing.
first of all, your JSON response is having NameAllList as a JSON Array of objects.
So you have to fetch JSON Array first, then you can fetch one-by-one object.
for example:
JSONObject jsonString = (new JSONObject(json_response_string));
JSONArray array = jsonString.getJSONArray("NameAllList");
for(int i=0; i<array.length(); i++)
{
// Retrieve Current object as such
JSONObject objCurrent = array.getJSONObject("Current");
// Retrieve Next object as such
JSONObject objNext = array.getJSONObject("Next");
}
You are not parsing json properly, so you are not able to fetch value of Name. Please note JSON Annotation [] represent JSONArray, and {} respresent JSONObject, so method to get current item's name is:
JSONObject jsonObj = new JSONObject(json_response_string);
JSONArray jsonArr=jsonObj.getJSONArray("NameAllList");
String Hora_name_current="";
for(int i=0;i<jsonArr.length();i++)
{
JSONObject obj=jsonArr.get(i);
try{
JSONObject subObj = obj.getJSONObject("Current");
Hora_name_current =subObj.getString("Name");
break;
}catch(JSONException ex)
{
}
}
looks like you're trying to use JSONObject when you should be using JSONArray for the second request. Try this:
JSONObject jsonString = (new JSONObject(json_response_string));
JSONArray array = jsonString.getJSONArray("NameAllList");
In your JSON return, "NameAllList is actually an array and needs to be handled as such. Once you set it to "array", you can then run a for loop and treat it like any other array in Java.
Let me know if that helps.
David
JSONObject jsonObj = new JSONObject(json_response_string);
JSONArray jsonArray = jsonObj.getJSONArrays("NameAllList");
I have a JSON format like this
{"response":{"status":true,"result":"user_exists"}}
Now i am trying to retrieve the Status value to do some logic
JSONObject jData = new JSONObject(data);
JSONArray response = jData.getJSONArray("response");
But i am getting the following error
org.json.JSONException: Value {"result":"user_exists","status":true}
at response of type org.json.JSONObject cannot be converted to
JSONArray
how to retrieve an Object from inside and Object ?
response is a JSONObject, not a JSONArray. Array objects are surrounded by these [] brackets, objects are with the normal ones {}. (See json.org for more format information)
Change
JSONArray response = jData.getJSONArray("response");
to
JSONObject response = jData.getJSONObject("response");
you are trying to retreive the status attribut from a JSONArray but , you don't have any JSONArray in your Code , ( JSONArray is surrounded by [] , and JSONObject is surrounded by {} ) ,
So to retreive the status value , try this :
JSONObject jData = new JSONObject(data);
JSONObject response = jData.getJSONObject("response");
boolean status = response.getBoolean("status");
response isn't an array but an object. Use getJSONObject and JSONObject instead of getJSONArray and JSONArray.
You have to first navigate to the response object by
JSONObject response = jData.getJSONObject("response") instead of JSONArray, as response is a object.