How to this JSON Parsing Android infinite data

Question

The API I'm using provides a JSON output. How can I parse it on android studio? I've never seen a JSON printout like this before.

{
"market":   {
        "100": {
        "name": "forexample",
        "surname": "forexample2"
},
         "101": {
        "name": "forexample3",
        "surname": "forexample4"
},

.
.
.

 "999": {
        "name": "forexampleXX",
        "surname": "forexampleXX"
}
}
}

"101" continues to increase by 1. It's going to be too long to make individual identifications. What's the shortest way?

Possible duplicate of [How do I parse JSON in Android?](https://stackoverflow.com/questions/9605913/how-do-i-parse-json-in-android) — Gautam Chibde, Oct 30 '18 at 06:20
"101" continues to increase by 1. It's going to be too long to make individual identifications. What's the shortest way? — Bill, Oct 30 '18 at 06:26
@Bill, I have updated answer now, you can get all values from your json Object. — Syed Hamza Hassan, Oct 30 '18 at 10:02

Syed Hamza Hassan · Answer 1 · 2018-10-30T10:01:27.930

0

This is how you get data from your desired Object

    JSONObject json= new JSONObject();
    json = response.getJSONObject("market");
    Iterator<String> iter = json.keys();//here you get 100,101,102 ....without accessing individually
    while (iter.hasNext()) {
    String key = iter.next();
    try {
        Object value = json.get(key);//Here you get you object values
    } catch (JSONException e) {
        // Something went wrong!
    }
    }

Further details read this

Feel free to ask if anything is not clear.

edited Oct 30 '18 at 10:01

answered Oct 30 '18 at 06:21

Syed Hamza Hassan

710
1
11
24

"101" continues to increase by 1. It's going to be too long to make individual identifications. What's the shortest way? – Bill Oct 30 '18 at 06:25
@Bill shortest way is to change your json response and make that a json array – Vivek Mishra Oct 30 '18 at 06:25
How should I define "101" to create a json array? – Bill Oct 30 '18 at 06:27
@Bill, yes one way is to change your response into Json array else you need to follow pattern to the specific number i.e in your case it is from 100-999 but remember if your response change at any point it will crash. – Syed Hamza Hassan Oct 30 '18 at 06:28
@Bill you no need to define 101 in array, you can access array with position – Vivek Mishra Oct 30 '18 at 06:39
@VivekMishra so, How will it be? can you talk briefly? – Bill Oct 30 '18 at 06:46
yes @VivekMishra is suggesting right, in array you don't need to access position by name while is object you are required to do this. – Syed Hamza Hassan Oct 30 '18 at 06:46

score 0 · Answer 2 · answered Oct 30 '18 at 06:28

0

Your "market" JSON should be JSONArray. Show you can use content with index.

Change your API output. Like,

{
"market":   [
         {
        "name": "forexample",
        "surname": "forexample2"
         },

         {
        "name": "forexample3",
        "surname": "forexample4"
         },

.
.
.

    {
        "name": "forexampleXX",
        "surname": "forexampleXX"
    }
 ]
}

answered Oct 30 '18 at 06:28

Abhay Koradiya

2,068
2
15
40

Sorry, I can't change the API output. Is there another way? – Bill Oct 30 '18 at 06:32
What issue you are facing for changing output ? Because this is the only efficient way. – Abhay Koradiya Oct 30 '18 at 06:33

score 0 · Answer 3 · answered Oct 30 '18 at 06:42

You could use https://github.com/google/gson. And transform the json to something like

HashMap<String,HashMap<String,Person>> map

This article could help for parsing this type- Deserializing Generic Types with GSON

Person would be a class with name and surname. First get the first level keys. -> map.keySet(), and for each new hashmap get the next level key. Something like

for (String key: map.keySet()) {
 HashMap < String, Person > personMap = map.get(key);
 for (String personKey: personMap() {
   Person person = map.get(personKey);
   // do what you want with the person object
  }
 }

Diaa Saada · Answer 4 · 2018-10-30T06:56:40.973

You can use GSON library it is very famous library add it like this

implementation 'com.google.code.gson:gson:2.8.2'

then u can parse it like this

Market market = new Gson().fromJson( jsonString , Market.class);

where Market Class will be

public class Market {
     public HashMap<Integer ,  User > result ;
}

AND

public class User{ 
    public String name ;
    public String surname ;
}

Or u can parse it without a class like this

HashMap<String,HashMap<String, User>>  result = gson.fromJson( jsonString , new TypeToken<HashMap<String,HashMap<String, User>>>() {
                        }.getType());

Hope this will help you @Bill.

How to this JSON Parsing Android infinite data

4 Answers4