How to get specific value from nested JSON object?

Question

I want to get a specific value from my nested JSON object like this:

{
    "success": true,
    "data": [
        {
         ...
        },
        {
            "id": 5,
            "nama": "Ngagoes Ulin Kalembur",
            "harga": 250000,
            "deskripsi": "Menikmati serunya berwisata keliling desa-desa di sekitaran desa alamendah menggunakan sepeda, menyusuri pemukiman, kebun-kebun dan pemandangan anda akan menemukan hal menarik selama perjalanan di desa alamendah, Pengemasan sayuran, pengrajin sovenir dll.",
            "gambarid": 11,
            "paketan": true,
            "fasilitas": "Sepeda,Angkutan Umum,Wisata Perternakan,Wisata Kuliner,Wisata Pertanian,Snack,Pemandu Lokal,Air Mineral",
            "totalTiket": 100,
            "minTiket": 50,
            "createdAt": "2021-03-07T10:44:10.000Z",
            "updatedAt": "2021-04-28T13:07:05.000Z",
            "deletedAt": null,
            "gambarId": 11,
            "Gambar": {
                "id": 11,
                "url": "https://desaalamendah.id/images/upload/ImageWisata-1615114030139.png",
                "isGallery": null,
                "createdAt": "2021-03-07T10:44:10.000Z",
                "updatedAt": "2021-03-07T10:47:10.000Z",
                "deletedAt": null
            }
        },

I already try for() and if() condition like this:

@override
public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response)
{
    JSONResponse jsonResponse = response.body();
    wisataList = new ArrayList<>(Arrays.asList(jsonResponse.getData()));

    Intent intent = getIntent();
    int id = intent.getIntExtra(HomeActivity.EXTRA_NUMBER, 0);
    for (int i = 0; i<jsonResponse.getData().length; i++)
    {
       if (id == i)
       {
         PutDataIntoRecyclerView(wisataList);
       }
    }
}

When I run it, it keeps returning all of the values. How to get a specific value, for example id = 3, from my nested JSON object?

add line "wisataList = new ArrayList<>(Arrays.asList(jsonResponse.getData().getJSONObject(i)));" in your if condition inside for loop and remove before loop. So you will get only that data which match condition. — pratik vekariya
– pratik vekariya, Commented Jul 22, 2021 at 5:50

mochadwi · Accepted Answer · 2021-07-22 06:42:26Z

From the following class: JSONResponse

Not sure if you were using a library, or has a POJOs called JSONResponse

Also, you're calling the JSONResponse#getData, it means there's a getter called getData

presumably, your project already has a POJO for the attributes inside "data": [ { ... }, { ... } ] objects

E.g:

public class JSONResponse {
   private List<Data> data;
   private String success;

   // getter & setter omitted
}


public class Data {

   private Integer id;
   private String nama;
   private Integer harga;
   private String deskripsi;
   private Integer gambarid;
   private Boolean paketan;
   private String fasilitas;
   private Integer totalTiket;
   private Integer minTiket;
   private String createdAt;
   private String updatedAt;
   private Object deletedAt;
   private Integer gambarId;
   private Gambar gambar;

   // getter and setter omitted

}


public class Gambar {

   private Integer id;
   private String url;
   private Object isGallery;
   private String createdAt;
   private String updatedAt;
   private Object deletedAt;

   // getter and setter omitted

}

Generate POJOs from JSON: https://www.jsonschema2pojo.org/

Or you can use plugins: https://plugins.jetbrains.com/plugin/8533-json2pojo

Here's the alternative approach might works for your usecases:

@override
public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response)
{
    JSONResponse jsonResponse = response.body();
    wisataList = new ArrayList<Data>();

    Intent intent = getIntent();
    int id = intent.getIntExtra(HomeActivity.EXTRA_NUMBER, 0);
    for (int i = 0; i<jsonResponse.getData().length; i++)
    {
        Data wisata = jsonResponse.getData().get(i);
        if (id == wisata.getId())
        {
            wisatList.add(wisata);
            // break; // optional if you want to stop iterating, if the wisata already found
        }
    }
    PutDataIntoRecyclerView(wisataList);

Arnau Mas · Accepted Answer · 2021-07-22 05:41:35Z

0

You can use org.json.simple library. You would do it like this:

import org.json.simple.*;

// I imagine response.body() is a String, if not, convert it to String
JSONObject jsonObject = (JSONObject) JSONValue.parse(response.body());
JSONArray data = (JSONArray) jsonObject.get("data");

for (int i = 0; i < data.size(); i++) {
    JSONObject jsonObject2 = (JSONObject)data.get(i);
    String id = (String) jsonObject2.get("id");
    
    if((id != null) && (id.equals("3"))){
        String nama_ = (String) jsonObject3.get("nama");
        //...
    }
   
}

answered Jul 22, 2021 at 5:41

Arnau Mas

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Comments

Sagive · Accepted Answer · 2022-11-07 21:11:58Z

0

But.. where are you assigning the json data into?
to simplify it - a small example - hope this helps

dataset:

let jsonData = {
    "success": true,
    "data": [
        {
            "id": 1,
            "name": "test",
        },
        {
            "id": 2,
            "name": "test2",
        },
        {
            "id": 3,
            "name": "test3",
        }
    ]
};

Get id=='2':

let response = jsonData.data.find(ele => ele.id == '2');

Response now has value of:

{ "id": 2, "name": "test2" }

answered Nov 7, 2022 at 21:11

Sagive

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