Develop Reference

How to get the json array

I want the array of custac from the given json data. But I dont know how to call custac from that. I want to get the custac values in an array. can anyone help
Here is my code
ArrayList<CustomerPayment> customerPayments = new
ArrayList<CustomerPayment>();
try {
JSONArray resultVal = response.getJSONArray("Data");
int count=resultVal.length();
for(int i=0;i<count;i++)
{
CustomerPayment payment = new CustomerPayment(resultVal.getJSONObject(i));
customerPayments.add(payment);
}
} catch (JSONException e) {
e.printStackTrace();
}
Here is my jsondata
Result: {
"Result": {
"Status": 200,
"Success": true,
"Reason": "OK"
},
"Data": [
{
"CustomerID": "PTM_103",
"FirstName": "Dhanya",
"LastName": "Jacob ",
"NickName": "",
"FundAmount": 440,
"custac": [
{
"AccountTrackingId": "prod_4",
"ReferenceID": "",
"CustomerID": "PTM_103",
"OrderID": "ae3208287743908eb8e5911d8e7e73df",
"orderAmount": "0",
"CreatedAt": "prod"
}
]
},
...

you have to make something like this
JSONObject jsonObject = new JSONObject(response);
JSONArray resultVal = jsonObject.getJSONArray("Data");

JSON data are objects parsed into a string for mostly NoSQL purposes and they can be parsed into objects. Gson is one of the libraries which is easy to use to parse your JSON data.
If you get jsonData as the response string which has Data, the following code can parse the custac in the list of array. But, firstly you have to create an object for Data
Data[] dataCollection = new Gson().fromJson(json,Data[].class);
Data must contain the attributes like CustomerID, FirstName, etc.
For your case,
class Data{
private String CustomerID;
private String FirstName;
private String LastName;
private String NickName;
private int FundAmount;
private ArrayList<Custac> custac;
class Custac{
// Write your attributes as shown above.
}
}

Try This Code
JSONArray custac;
try {
JSONArray resultVal = jsonObject.getJSONArray("Data");
for (int i = 0; i < resultVal.length() - 1; i++) {
jsonObject = resultVal.getJSONObject(i);
custac = jsonObject.getJSONArray("custac");
Log.d("TAG, custac + "");
}
} catch (JSONException e) {
e.printStackTrace();
}

How can i parse this jsonarray into recyclerview? [duplicate]

This question already has answers here:
Parse JSON Array without Key in Android
(3 answers)
Closed 4 years ago.
Please Help me How can I parse this type of json response in recyclerview in android? Please give me answer i search many but i not get any answer
{
"data1": [
"",
"",
"",
""
],
"data2": [
"aaa",
"aaa",
"aaa",
"aaa"
],
"data3": [
"bbb",
"bbb",
"bbb",
"bbb"
]
}
i try this but only add last position data not all data
try {
Log.e("res_gallery123456", responseString);
JSONObject jsonObj = new JSONObject(responseString);
BuyData buydata = new BuyData();
JSONArray data1= jsonObj.getJSONArray("data1");
for (int i = 0;i<data1.length();i++){
buydata.setTxt_img(data1.getString(i));
JSONArray data2=jsonObj.getJSONArray("data2");
for (int j = 0;j<data2.length();j++){
buydata.setTxt_price(data2.getString(j));
JSONArray data3= jsonObj.getJSONArray( "data3");
for (int k = 0;k<data3.length();k++) {
buydata.setTxt_ammount(data3.getString(k));
}
}
buyDataList.add(buydata);
dialog.dismiss();
}
} catch (JSONException e) {
dialog.dismiss();
e.printStackTrace();
}

Update the code
try {
Log.e("res_gallery123456", responseString);
JSONObject jsonObj = new JSONObject(responseString);
JSONArray data1= jsonObj.getJSONArray("data1");
JSONArray data2= jsonObj.getJSONArray("data2");
JSONArray data3= jsonObj.getJSONArray("data3");
for (int i = 0;i<data1.length();i++){
BuyData buydata = new BuyData();
buydata.setTxt_img(data1.getString(i));
buydata.setTxt_price(data2.getString(i));
buydata.setTxt_ammount(data3.getString(i));
buyDataList.add(buydata);
dialog.dismiss();
}
} catch (JSONException e) {
dialog.dismiss();
e.printStackTrace();
}

Getting JSON Array values Within a JSOn Object and Use In Class Object

I am trying to populate a class object with JSON data, and I keep getting this error
org.json.JSONException: No value for machinereports
Here is the sample json file, I am trying to use
{
"id" : 1,
"reports": [
{
"id": "1",
"title": "For Reorder",
"subtitle": "Report Name",
"date": "Monday, Aug 08, 2016",
"machinereports": [
{
"name": "Reorder List",
"count": "9"
},
{
"name": "Reorder List Critical",
"count": "9"
}
]
}
]
}
Here is the code I am trying to retrieve and populate my class object with
public class Report {
public String id;
public String title;
public String subtitle;
public String date;
public ArrayList<String> machinereports = new ArrayList<>();
public static ArrayList<Report> getReportsFromFile(String filename, Context context) {
final ArrayList<Report> reportList = new ArrayList<>();
try {
// Load Data
String jsonStr = loadJsonFromAsset("reports.json", context);
JSONObject jsonOne = new JSONObject(jsonStr);
JSONArray reports = jsonOne.getJSONArray("reports");
// Get Report objects from data
for(int i = 0; i < reports.length(); i++) {
Report report = new Report();
report.id = reports.getJSONObject(i).getString("id");
report.title = reports.getJSONObject(i).getString("title");
report.subtitle = reports.getJSONObject(i).getString("subtitle");
report.date = reports.getJSONObject(i).getString("date");
// Get inner array listOrReports
JSONArray rList = jsonOne.getJSONArray("machinereports");
for(int j = 0; j < rList.length(); j++) {
JSONObject jsonTwo = rList.getJSONObject(j);
report.machinereports.add(jsonTwo.getString("reportName"));
/* report.machinereports.add(jsonTwo.getString("count"));*/
}
reportList.add(report);
}
} catch (JSONException e) {
e.printStackTrace();
}
return reportList;
}
I can't seem to figure out, where I am having the problem, when I step through, when it gets to second JSONArray object it goes to the catch exception.

Your JSON does not have a field named reportName.
report.machinereports.add(jsonTwo.getString("reportName"));
change it to
report.machinereports.add(jsonTwo.getString("name"));
Also with the answer from #comeback4you you have the wrong call to the JsonArray.
JSONArray rList = jsonOne.getJSONArray("machinereports");
Should be
JSONArray rList = reports.getJSONObject(i).getJSONArray("machinereports");

JSONArray rList = jsonOne.getJSONArray("machinereports");
change to
JSONArray rList = reports.getJSONObject(i).getJSONArray("machinereports");
and inside for loop change below
report.machinereports.add(jsonTwo.getString("name"));

Android parse nested json

Hi guys I have a problem parsing my nested json array. This is my sample json response:
{
"SUCCESS": true,
"DATA": [
{
"ShowData": [
{
"ShowTitle": "Episode 1",
"Category": "Comedy"
},
{
"ShowTitle": "Episode 1a",
"Category": "Drama"
},
{
"ShowTitle": "Mr. Right",
"Category": "Musical"
},
{
"ShowTitle": "The Making",
"Category": "Talk"
},
{
"ShowTitle": "Presscon",
"Category": "Comedy"
},
{
"ShowTitle": "Presscon 2",
"Category": "Drama"
},
{
"ShowTitle": "Episode 2",
"Category": "Comedy"
},
{
"ShowTitle": "Episode 2",
"Category": "Drama"
}
]
}
]
}
This is what I've tried so far:
Activity:
ArrayList<HashMap<String, String>> showsList
= Parser.getShowsResponseBody(response);
ArrayList<HashMap<String, String>> result = new ArrayList<>();
Set<String> titles = new HashSet<>();
for(HashMap<String, String> map : showsList) {
if(titles.add(map.get("Category"))) {
result.add(map);
}
}
Parser:
public static List<Show> getShowsResponseBody(Response response) {
BufferedReader reader = null;
StringBuilder sb = new StringBuilder();
try {
reader = new BufferedReader(new InputStreamReader(response.getBody().in()));
String line;
try {
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
String result = sb.toString();
List<WorldShow> list = new ArrayList<>();
try {
JSONObject json = new JSONObject(result);
JSONArray jArray = json.getJSONArray("Data");
for (int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
JSONArray arr = json_data.getJSONArray("ShowData");
for(int j = 0; j < arr.length(); j++) {
JSONObject innerData = arr.getJSONObject(j);
Show show = new Show(); // Create Object here
show.setShowTitle(innerData.getString("ShowTitle"));
show.setCategory(innerData.getString("Category"));
list.add(show); // Finally adding the model to List
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return list;
}
My expected output is:
Comedy: Episode 1, Presscon, Episode 2
Drama: Episode 1a, Presscon 2, Episode 2
Musical: Mr. Right
Talk: The Making
But when I run the app, it's displaying all the records in all category. What seem to be wrong with my code? I already used HashSet to remove duplicate objects but it's still the same. Any help would be gladly appreciated! Thanks in advance!

// Make a map to hold the mapping between categories and shows:
// (A single category is mapped to a collection of 1 or more shows)
Map<String,List<Show>> catShows = new HashMap<String,List<Show>>();
// Put a Show object into the category map for its matching category:
private void addShow( Map<String,List<Show>> map, Show show ) {
// Get the shows already stored under that category:
List<Show> list = map.get( show.getCategory() );
if ( list == null ) {
// There's no entry for that category yet, so we create a new (empty) list:
list = new ArrayList<Show>();
// Store the new list for its category:
map.put( show.getCategory(), list );
}
// Add the given show to the list for its category:
list.add( show );
}
// Example for how to iterate over the map created above:
private void process( Map<String,List<Show>> map ) {
for ( Map.Entry<String, List<Show>> e : map.entrySet() ) {
final String category = e.getKey();
final List<Show> shows = e.getValue();
// Now we have in shows the list of all shows for the category.
System.out.println( "Cat: " + category );
// Output all shows for the current category:
for ( Show s : shows ) {
System.out.println ( s.getShowTitle() );
}
}
}

I think you might change your approach.
I suggest you to use GSon Library and create a class that represents your json:
Possible scenario:
Result.class
public class Result{
boolean success;
List<Data> data;
//getter and setter
}
Data.class
public class Data{
List<Item> items;
//getter and setter
}
Item.class
public class Item{
String ShowTitle;
String Category;
//getter and setter
}
to parse json:
Gson gson = new Gson();
Result result = gson.fromJson(json, Result.class);
check this

Android parse json tree

I have tree JSON-structured data.
Something like
{
"result": [
{
"id": 1,
"name": "test1"
},
{
"id": 2,
"name": "test12",
"children": [
{
"id": 3,
"name": "test123",
"children": [
{
"id": 4,
"name": "test123"
}
]
}
]
}
]
}
model:
class DataEntity {
int id;
String name;
List<DataEntity> childDataEntity;
}
Parsing via org.json
List<DataEntity> categories = new ArrayList<DataEntity>();
private List<DataEntity> recursivellyParse(DataEntity entity, JSONObject object) throws JSONException {
entity.setId(object.getInt("id"));
entity.setName(object.getString("name"));
if (object.has("children")) {
JSONArray children = object.getJSONArray("children");
for (int i = 0; i < children.length(); i++) {
entity.setChildDataEntity(recursivellyParse(new DataEntity(), children.getJSONObject(i)));
categories.add(entity);
}
}
return categories;
}
call
JSONObject jsonObject = new JSONObject(JSON);
JSONArray jsonArray = jsonObject.getJSONArray("result");
for (int i = 0; i < jsonArray.length(); i++) {
recursivellyParse(new DataEntity(), jsonArray.getJSONObject(i));
}
But this way is wrong. After execution of the method List filled out same data.
How do I parse it right?
UPD: update JSON.

Here is Full Demo How to Parse json data as you want.
String JSON = "your json string";
ArrayList<DataEntity> finalResult = new ArrayList<>();
try {
JSONObject main = new JSONObject(JSON);
JSONArray result = main.getJSONArray("result");
for(int i=0;i<result.length();i++){
DataEntity dataEntity = parseObject(result.getJSONObject(i));
finalResult.add(dataEntity);
}
Log.d("DONE","Done Success");
} catch (JSONException e) {
e.printStackTrace();
}
Create One recursive function to parse object.
public DataEntity parseObject(JSONObject dataEntityObject) throws JSONException {
DataEntity dataEntity = new DataEntity();
dataEntity.id = dataEntityObject.getString("id");
dataEntity.name = dataEntityObject.getString("name");
if(dataEntityObject.has("children")){
JSONArray array = dataEntityObject.getJSONArray("children");
for(int i=0;i<array.length();i++){
JSONObject jsonObject = array.getJSONObject(i);
DataEntity temp = parseObject(jsonObject);
dataEntity.children.add(temp);
}
}
return dataEntity;
}
Model Class
public class DataEntity implements Serializable {
public String id = "";
public String name = "";
ArrayList<DataEntity> children = new ArrayList<>();}
In FinalResult Arraylist you will get all your parse data.

Ignoring that the JSON you show is invalid (i'm going to assume that's a copy/paste problem or typo), the issue is that you've declared your categories List as a member of whatever object that is.
It's continually getting added to on every call to recursivellyParse() and that data remains in the list. Each subsequent call from your loop is seeing whatever previous calls put in it.
A simple solution to this as your code is written would be to simply add a second version that clears the list:
private List<DataEntity> beginRecursivellyParse(DataEntity entity,
JSONObject object) throws JSONException {
categories.clear();
return recursivellyParse(entity, object);
}
Then call that from your loop.