Okay, I'm struggling here. I am getting the following JSON formated string from my php server (called "result") (edited! I was missing a curly brace at the end):
{"L1":[{"UserName":"User1","Avatar":"1"},{"UserName":"User2","Avatar":"2"},{"UserName":"User3","Avatar":"3"}],"L2":[{"UserName":"User4","Avatar":"4"},{"UserName":"User5","Avatar":"5"}]}
I'm trying to extract an ArrayList with the Avatar numbers from the L1 object(?). But I get an error
org.json.JSONException: Value
[{"UserName":"User1","Avatar":"1"},{"UserName":"User2","Avatar":"2"},{"UserName":"User3","Avatar":"3"}]
at L1 of type org.json.JSONArray cannot be converted to JSONObject
Here's my code:
try {
JSONObject jsonObject = new JSONObject(result);
JSONArray jsonArray = new JSONArray(jsonObject.getJSONObject("L1"));
ArrayList<Integer> arrList = new ArrayList<>();
if (jsonArray != null) {
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject json = jsonArray.getJSONObject(i);
arrList.add(json.getInt("Avatar"));
AvatarList = arrList;
}
}
String query_result = "SUCCESS";
if (query_result.equals("FAILURE")) {
} else {
setAvatars(AvatarList);
}
} catch (JSONException e) {
Log.e("log_tag", "Error converting result "+e.toString());
}
If I use
jsonObject.getJSONArray("L1")
I get the same error.
Any suggestions?
Thanks in advance!
(edit: I made a mistake in the original post. There was a missing curly brace in the JSON string. Thanks to those who caught that)
Try the below one.Its working fine. I'm using json-simple-1.1.1 jar
String r="{\"L1\":[{\"UserName\":\"User1\",\"Avatar\":\"1\"},{\"UserName\":\"User2\",\"Avatar\":\"2\"},{\"UserName\":\"User3\",\"Avatar\":\"3\"}],\"L2\":[{\"UserName\":\"User4\",\"Avatar\":\"4\"},{\"UserName\":\"User5\",\"Avatar\":\"5\"}]}";
Object obj=JSONValue.parse(r);
JSONObject jsonObject = (JSONObject) obj;
JSONArray jsonArray = (JSONArray) jsonObject.get("L1");
ArrayList<Integer> arrList = new ArrayList<>();
if (jsonArray != null) {
for (int i = 0; i < jsonArray.size(); i++) {
JSONObject json = (JSONObject) jsonArray.get(i);
arrList.add((Integer.parseInt((String) json.get("Avatar"))));
AvatarList = arrList;
}
}
String query_result = "SUCCESS";
if (query_result.equals("FAILURE")) {
} else {
setAvatars(AvatarList);
}
This ended up working for me if anyone stumbles upon this. I don't really understand why this worked and my original method didn't... something to do with JSONObjects vs JSONArrays vs Strings and things like [, {, }, and ] probably.
try {
JSONObject jsonObject = new JSONObject(result);
JSONArray jsonArray = new JSONArray(jsonObject.getString("L1"));
ArrayList<Integer> arrList = new ArrayList<>();
if (jsonArray != null) {
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject json = jsonArray.getJSONObject(i);
arrList.add(json.getInt("Avatar"));
AvatarList = arrList;
}
}
Related
i tried to convert jsonstring to json object. but its convert only first element.
here is my code
String d = [{"name":"kd","isMe":"yes","time":"10:12 AM"},{"name":"you","isMe":"no","time":"10:12 AM"}]
JSONObject j = new JSONObject(d);
its give following output
{"name":"kd","isMe":"yes","time":"10:12 AM"}
how can i convert this string into JSNOObject?
You can try like this, and your root is Json array not jsonobject
try {
JSONArray jsonArray = new JSONArray(d);
if(jsonArray != null) {
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.optJSONObject(i);
if(jsonObject == null) {
continue;
}
String name = jsonObject.optString("name");
String isMe = jsonObject.optString("isMe");
String time = jsonObject.optString("time");
}
}
} catch (JSONException e) {
e.printStackTrace();
}
Use this
JSONObject jsonObject = new JSONObject(my_json_string);
JSONArray jresult = jsonObject.getJSONArray("array_in_the_json_string");
I have JSON from file.
{
"from_excel":[
{
"solution":"Fisrt",
"num":"1"
},
{
"solution":"Second",
"num":"2"
},
{
"solution":"third",
"num":"3"
},
{
"solution":"fourth",
"num":"4"
},
{
"solution":"fifth",
"num":"5"
}
]
}
and want to parse list of Solution and Num.
Used lib org.json.simple.*
Try this one
Object obj = parser.parse(new FileReader("E:\\json.txt"));
JSONObject jsonObject = (JSONObject) obj;
out.println(jsonObject.get("from_excel"));
JSONObject obj_new = (JSONObject) jsonObject.get("from_excel");
JSONArray solution = (JSONArray) obj_new.get("solution");
Iterator iterator = solution.iterator();
while (iterator.hasNext()) {
out.println(iterator.next());
}
What am I doing wrong?
If try to write
JSONObject solutions = (JSONArray) jsonObject.get("from_excel");
If try to write
JSONArray array = obj.getJSONArray("from_excel");
get error
working solution
JSONParser parser = new JSONParser();
JSONObject jsonObject;
try {
jsonObject = (JSONObject) parser.parse(new FileReader("E:\\json.txt"));
out.println("<br>"+jsonObject);
JSONArray from_excel = (JSONArray)jsonObject.get("from_excel");
// for row output 1
for(Object o: from_excel){
out.println("<br>"+o);
}
// for row output 2
Iterator iterator = from_excel.iterator();
while (iterator.hasNext()) {
out.println("<br>"+iterator.next());
}
// for item output 3
for (int i = 0; i < from_excel.size(); i++) {
JSONObject jsonObjectRow = (JSONObject) from_excel.get(i);
String num = (String) jsonObjectRow.get("num");
String solution = (String) jsonObjectRow.get("solution");
out.println("<br>num="+num+"; solution="+solution);
}
} catch (Exception e) {
out.println("Error: "+e);
}
There is no "solution" array in the JSON. "from_excel" is the array. So your code should look like this :
Object obj = parser.parse(new FileReader("E:\\json.txt"));
JSONObject jsonObject = (JSONObject) obj;
out.println(jsonObject.get("from_excel"));
JSONArray solutions = (JSONArray) jsonObject.get("from_excel");
Iterator iterator = solutions.iterator();
while (iterator.hasNext()) {
out.println(iterator.next());
}
from_excel is JSON array not an object. So you should achieve it is array.
JSONObject jsonObject = (JSONObject) obj;
JSONArray array = obj.getJSONArray("from_excel");
then iterate the array and get each jsonobject. Something like the below
for(int i = 0 ; i < array.length() ; i++){
array.getJSONObject(i).getString("solution");
}
So i have a Json string that i have retrieved from my PHP script on my MySQL server
{"Clientid":[24,26,27],"companyname":["chelsea","Microsoft","IBM"]}
and i have been trying to push this into a java objects in-order to populate a spinner at the moment the spinner on each line shows "chelsea","Microsoft","IBM" but i would like to show each company on a separate line so the user can select which company
current code
String response = stringBuilder.toString();
Log.d("response", response);
JSONObject jsonResponse = new JSONObject(response);
Log.d("response", jsonResponse.toString());
responseStreamReader.close();
Log.d("length", Integer.toString(jsonResponse.length()));
if (jsonResponse.length() == 0) {
returnedClient = null;
} else {
List<Client> myClients;
myClients = new ArrayList<Client>();
for (int i = 0; i < jsonResponse.length(); i++) {
Client client = new Client();
client.clientid = jsonResponse.getString("Clientid");
client.companyname = jsonResponse.getString("companyname");
myClients.add(client);
}
returnedClient = myClients;
}
} catch (Exception e) {
e.printStackTrace();
}
//Log.d("returnedUser", returnedUser.userpassword);
return returnedClient;
current code is obviously the wrong code so i have been looking at Gson and Jackson and volley and getting in a mess so i have been looking at the below but cant get it right to fit the Json string so wondered if you could help please or advise a better solution?
JSONArray jarray = jsonResponse.getJSONArray("companyname");
ArrayList<String> xyz= new ArrayList<String>();
for(int i = 0; i < jarray.length(); i++){
JSONArray timeArray =jarray.getJSONObject(i).getJSONArray("companyname");
for(int j = 0; j < timeArray .length(); j++){
xyz.add(timeArray .getString(j));
Log.d("get value",timeArray .getString(j));
Is there something im missing with the parser as doesnt matter what i change it seems to not like anything i do, it says the json cant be an object then it cant be an array, i assume the json is an object then an array but at the mormnt i just get errors :(
try {
List<Client> returnedClient = null;
// JSONObject json = new JSONObject(content);
JSONArray json1 = new JSONArray(content);
//JSONObject dataObject1 = json.getJSONObject("Clientid");
//JSONObject dataObject2 = json.getJSONObject("companyname");
// JSONArray items1 = json.getJSONArray("Clientid");
// JSONObject items2 = json.getJSONObject("companyname");
// JSONArray items1 = json.getJSONArray("Clientid");
JSONArray items2 = json1.getJSONArray(0);
for (int i = 0; i < items2.length(); i++) {
// JSONArray clientObject1 = items1.getJSONArray(i);
// JSONObject clientObject2 = items2.getJSONObject(i);
JSONArray clientObject3 = items2.getJSONArray(i);
// Client client = new Client(clientObject2);
Log.d("response",clientObject3.toString());
// returnedClient.add(client);
}
O silly me the is was further up the tree as i was using the code below at the top of the page before i even started the parse, shame it took me to re write my sql before i noticed :(
JSONObject jsonResponse = new JSONObject(response);
I submit a query from my Java application, which upon running on Elasticsearch server returns the result in the form of a string. I want the result as a list of JSONObject objects. I can convert the string to a JSONObject using JSONObject jsonResponse = new JSONObject(responseString).
Is there any method by which I can get this in the form of a List<JSONObject>?
Instead of using JSONObject you may use JSONArray. If you really need to convert it to a List you may do something like:
List<JSONObject> list = new ArrayList<JSONObject>();
try {
int i;
JSONArray array = new JSONArray(string);
for (i = 0; i < array.length(); i++)
list.add(array.getJSONObject(i);
} catch (JSONException e) {
System.out.println(e.getMessage());
}
There is an answer of your question:
https://stackoverflow.com/a/17037364/1979882
ArrayList<String> listdata = new ArrayList<String>();
JSONArray jArray = (JSONArray)jsonObject;
if (jArray != null) {
for (int i=0;i<jArray.length();i++){
listdata.add(jArray.get(i).toString());
}
}
This method is really easy and works too
try {
JSONObject jsonObject = new JSONObject(THESTRINGHERE);
String[] names = JSONObject.getNames(jsonObject);
JSONArray jsonArray = jsonObject.toJSONArray(new JSONArray(names));
ArrayList<String> listdata = new ArrayList<String>();
JSONArray jArray = (JSONArray)jsonArray;
if (jArray != null) {
for (int i=0;i<jArray.length();i++){
listdata.add(jArray.get(i).toString());
}
}
// System.out.println(listdata);
} catch (Exception e) {
System.out.println(e.getMessage());
}
I have a webservice which returns a JSON array in this format:
[{"imageid":"3","userid":"1","imagepath":"SLDFJNDSKJFN","filterid":"1","dateadded":"2014-05-06 21:20:18.920257","public":"t"},
{"imageid":"4","userid":"1","imagepath":"dsfkjsdkfjnkjdfsn","filterid":"1","dateadded":"2014-05-06 21:43:37.642748","public":"t"}]
I need to get all the attributes seperately? How would I do this?
I know how to do it with JSONObject if there is just 1 thing being returned, but how does it work when multiple items are returned?
Thanks
try {
JSONArray jArray = new JSONArray(jsonString);
String s = new String();
for (int i = 0; i < jArray.length(); i++) {
s = jArray.getJSONObject(i).getString("imageid").toString();
s = jArray.getJSONObject(i).getString("userid").toString();
}
} catch (JSONException je) {
}
Create an Object class with all variables, create a List for this Object, add all objects in your JSONArray to the list, use the one you need.
List<YourObject> objList = new ArrayList<YourObject>();
JSONArray a = new JSONArray(response);
int size = a.length();
for (int i=0 ; i<size ; i++){
JSONObject aa = a.getJSONObject(i);
String id = aa.getString("imageid");
String userid = aa.getString("userid");
String imagepath = aa.getString("imagepath");
String filterid = aa.getString("filterid");
String dateadded = aa.getString("dateadded");
String publicText = aa.getString("public");
YourObject obj = new YourObject(id,userid,imagepath,filterid,dateadded,publicText);
objList.add(obj);
}
So what you are having here is some JSON objects inside a JSON array.
What you want to do is this:
JSONArray array = ...;
for (int i = 0; i < array.length(); i++) {
JSONObject o = array.getJSONObject(i);
// Extract whatever you want from the JSON object.
}
I hope it helped.
You can use JSONArray to parse array of JSON response.
private void parseJsonArray(String response) {
try {
JSONArray array = new JSONArray(response);
for(int i=0;i<array.length();i++){
JSONObject jsonObject = array.getJSONObject(i);
String ImageId = jsonObject.getString("imageid");
Log.v("JSON Parser", "ImageId: "+ImageId);
}
} catch (Exception e) {
e.printStackTrace();
}
}