How to access data in nested JSON object?

Question

I have some data provided from an API for example this is the data, this is just a part of the data, but this is the part that I need to access

  "logo_url_string": null,
                "name": "google",
                "category_image": {
                    "id": 24,
                    "cover_url": {
                        "url": "http://",
                        "icon_circle": {
                            "url": "http://"
                        }

The question is how can I access the "url" inside cover_url thats inside category_image?, and so far I've been able to access it from a Model class with setter and getters and an adapter but I don't know how can I access data that is nested with setters and getters I have to do it with setters and getters because I have an adapter class where I get all the data into de cardview and then I load it to a recycler that is in a fragment, please any help would be great Thank you! my model is like this

Business.java

public class Business {

    private String name, description, email, website, logo_url_string,cover_url_string;


    public Business(){}
public class Images{

}

    public Business(String name,  String logo_url_string) {

        this.name = name;

        this.logo_url_string = logo_url_string;


    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }


    public String getLogo_url_string() {
        return logo_url_string;
    }

    public void setLogo_url_string(String logo_url_string) {
        this.logo_url_string = logo_url_string;
    }

And I access that data with and Adapter

Adapter.java

public class SearchHorizontalAdapter extends RecyclerView.Adapter<SearchHorizontalAdapter.ViewHolder> {

    private ArrayList<Business> premiumsList;

    Bitmap bitmap;
    ImageView logo;
    private Activity activity;
    private int layoutMolde;



    public SearchHorizontalAdapter(Activity activity, ArrayList<Business> list, int layout ) {

        this.activity = activity;
        this.premiumsList = list;
        layoutMolde = layout;
    }

    @Override
    public SearchHorizontalAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.search_high_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(SearchHorizontalAdapter.ViewHolder holder, int position) {
       // holder.mTitle.setText(premiumsList.get(position));
        holder.mTitle.setText(premiumsList.get(position).getName());
        //holder.mImg.setImageURI(Uri.parse(premiumsList.get(position).getLogo_url_string()));


//        if( Glide.with(this.activity).load(premiumsList.get(position).getLogo_url_string())==null) {
//          Glide.with(this.activity).load(premiumsList.get(position).getCategory_image()).into(holder.mImg);
//        }
        Glide.with(this.activity).load(premiumsList.get(position).getLogo_url_string()).into(holder.mImg);
    }

    @Override
    public int getItemCount() {
        return premiumsList.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {

        public TextView mTitle;
        public ImageView mImg;


        public ViewHolder(View itemView) {
            super(itemView);
            mTitle = (TextView) itemView.findViewById(R.id.nom_business);
            mImg= (ImageView) itemView.findViewById(R.id.img_business);

        }


    }


}

even if it is nested? I mean, I have already parsed some data, but I want the one that's nested — Juan P., Feb 16 '17 at 05:03
yor Json is wrong please check it first using http://json.parser.online.fr/ — Rajesh Satvara, Feb 16 '17 at 05:04
the json isn't wrong but this is just a part of all the data, it is way to much to put it here, I just pasted the part that I need :/ — Juan P., Feb 16 '17 at 05:18
Possible duplicate of [How to parse JSON in Java](http://stackoverflow.com/questions/2591098/how-to-parse-json-in-java) — rohitanand, Feb 16 '17 at 06:26
I truly appreaciatte all the response thank you all for your help, but, it is not what i'm asking, the problem that I have is that, i'm trying to get that info with setters and getters because I have to insert that into a cardview and then add the adapter to a recylcler, that is the problem I don't know how to access the nested data to do all that :/ — Juan P., Feb 16 '17 at 18:45

score 0 · Answer 1 · answered Feb 16 '17 at 05:29

0

Try This,

    try {
        JSONObject objResult = new JSONObject(response);

        String name = objResult.getString("name");
        JSONObject category_image_obj=objResult.getJSONObject("category_image");
        JSONObject cover_url_obj=category_image_obj.getJSONObject("cover_url");
        String url = cover_url_obj.getString("url");

         ArrayList premiumsList =new ArrayList<>();
         premiumsList.add(new Business(name,url);
        //call adapter here


    } catch (JSONException e) {
        e.printStackTrace();
    }

answered Feb 16 '17 at 05:29

Komal12

3,340
4
16
25

hank you but it is not what I'm asking the problem is that I have a cardview adapter where I add the data that I need to show from setters and getters and then I load the adapter into a recyclerview that is in a fragment where the gson is, that's why I need to do it whit setters and getters like the code above, but I don't know how to make the setters and getters for the nested data THANK YOU SO MUCH for your help – Juan P. Feb 16 '17 at 18:51

Kiran Benny Joseph · Answer 2 · 2017-02-17T03:36:25.457

First of all your json is wrong. If your json is like this,

{
"logo_url_string":null,
"name":"google",
"category_image":{
"id":"24",
"cover_url":{
"url":"http://",
"icon_circle":{
"url":"http://"
          }
     }
   }
 }

Try this

try {
            JSONObject ai=new JSONObject(response);
            JSONObject cat_img=ai.getJSONObject("category_image");
            int id=cat_img.getInt("id");  //you can get id here
            JSONObject cat_url=cat_img.getJSONObject("cover_url");
            String url=cat_url.getString("url");  //you can get url from here
            ArrayList<Business> premiumsList=new ArrayList<>();
            premiumsList.add(new Business(cat_img.getString("name"),url)); //add it to aaray
    } catch (JSONException e) {
            e.printStackTrace();
    }

Furthermore you can use this for making getters and setters for nested json.

thank you but it is not what I'm asking the problem is that I have a cardview adapter where I add the data that I need to show from setters and getters and then I load the adapter into a recyclerview that is in a fragment where the gson is, that's why I need to do it whit setters and getters like the code above, but I don't know how to make the setters and getters for the nested data THANK YOU SO MUCH for your help — Juan P., Feb 16 '17 at 18:51

score 0 · Answer 3 · answered Feb 16 '17 at 05:32

IF your JSON response as below then you can parse to use below java code.

{
    "contacts": [
        {
                "id": "c200",
                "name": "Android Developer",
                "email": "android.developer@gmail.com",
                "address": "xx-xx-xxxx,x - street, x - country",
                "gender" : "male",
                "phone": {
                    "mobile": "+91 0000000000",
                    "home": "00 000000",
                    "office": "00 000000"
                }
        }
  ]
}

Java Code where you can parse your JSON. I hope you will get your answer.

@Override
protected Void jsonParsing(String jsonString) {


    ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
    // Store a json string in string variable
    String jsonStr = jsonString;

    Log.e(TAG, "Response from url: " + jsonStr);

    if (jsonStr != null) {
        try {
            JSONObject jsonObj = new JSONObject(jsonStr);

            // Getting JSON Array node
            JSONArray contacts = jsonObj.getJSONArray("contacts");

            // looping through All Contacts
            for (int i = 0; i < contacts.length(); i++) {
                JSONObject c = contacts.getJSONObject(i);

                String id = c.getString("id");
                String name = c.getString("name");
                String email = c.getString("email");
                String address = c.getString("address");
                String gender = c.getString("gender");

                // Phone node is JSON Object
                JSONObject phone = c.getJSONObject("phone");
                String mobile = phone.getString("mobile");
                String home = phone.getString("home");
                String office = phone.getString("office");

                // tmp hash map for single contact
                HashMap<String, String> contact = new HashMap<>();

                // adding each child node to HashMap key => value
                contact.put("id", id);
                contact.put("name", name);
                contact.put("email", email);
                contact.put("mobile", mobile);

                // adding contact to contact list
                contactList.add(contact);
            }
        } catch (final JSONException e) {
            Log.e(TAG, "Json parsing error: " + e.getMessage());
        }
    } else {
        Log.e(TAG, "Couldn't get json from server.");
    }
}

For more detail about JSON Parsing please read this documentation. Other read this tutorial that how to parse the JSON.

thank you but it is not what I'm asking the problem is that I have a cardview adapter where I add the data that I need to show from setters and getters and then I load the adapter into a recyclerview that is in a fragment where the gson is, that's why I need to do it whit setters and getters like the code above, but I don't know how to make the setters and getters for the nested data THANK YOU SO MUCH for your help — Juan P., Feb 16 '17 at 18:49

How to access data in nested JSON object?

3 Answers3