How to Parse Json Objects of Json Object and of Object (outdated)

Question

I'm trying to parse multiple objects,Bellow i'm receiving Json Sample The requirement completed and my question now outdated, can someone please up-vote to help me for asking next question? Will he helpfull for and thanks for

 {
    "0": //outer objects are multiples, i just post one object for sample
    {
        "id": "1",      
        "name": "B2 MR1",
        "description": 
        {
            "0": //it is also multiple objects m just showing one
            {

                "title": "Carve the Future",
                "description": "Welcome to Meeting Room 1",
                "push_notification": "Carve the Future",

            }
        }
    },//after that the next obj will be show
  .
  .
}

In second object 1 i also have above keys and values, i can't handel it, here is my Model.

 public class JsonModel {   

      private String id;    //getter setter
      private String name;  //getter setter
     List<InnerDescprtion> description;  //getter setter
    }

Here is my InnerDescprtion Model

 private class InnerDescprtion {
       private String id; //getter setter
       private String title;  //getter setter
     }

And below is my java code for parsing it using Gson,

   JsonModel outterModelClass= null;
                    List<JsonModel> listObj = new ArrayList<>();
                    for (int i = 0; i < responseJson.length(); i++) {

                        try {
                            outterModelClass= new Gson().fromJson(responseJson.getString(String.valueOf(i)), JsonModel.class);
                            listObj.add(outterModelClass); //here i'm getting exception,,
                        } catch (JSONException e) {
                            e.printStackTrace();
                             }
                    }

I get the solution, Please up-vote to help me.

What type of exception are you getting? – Ivied Aug 03 '17 at 13:33 — Ivied, Aug 03 '17 at 13:33

score 0 · Accepted Answer · answered Aug 03 '17 at 14:38

If it is possible for you I would change the json to something like this:

 [{
        "id": "1",
        "name": "B2 MR1",
        "description": [{
            "id" : "1-1",
            "title": "Carve the Future",
            "description": "Welcome to Meeting Room 1",
            "push_notification": "Carve the Future"
        }]
    },
    {
        "id": "2",
        "name": "B2 MR2",
        "description": [{
            "id" : "2-1",
            "title": "Carve the Future 2",
            "description": "Welcome to Meeting Room 2",
            "push_notification": "Carve the Future 2"
        }]
    }
 ]

Then your approach should work with just a few changes:

BufferedReader br = new BufferedReader(new FileReader("c:/test/test.json"));
Type listType = new TypeToken<ArrayList<JsonModel>>(){}.getType();

List<JsonModel> outterModels = new Gson().fromJson(br, listType);

If you can't change the json I would suggest to use another JSON library like json simple and extract everything manually.

score 0 · Answer 2 · answered Aug 03 '17 at 14:47

0

Your 'listObj' should be defined this way:

ArrayList<JsonModel> listObj = new ArrayList<JsonModel>();

answered Aug 03 '17 at 14:47

Manzurul

633
6
11

score 0 · Answer 3 · answered Aug 03 '17 at 15:04

Well that is a nasty looking JSON. However I recommend you use volley android library. I had a task with somewhat similar problem. Only there was a single object inside of another object. To include volley in your project, update your build.gradle app module with compile 'com.android.volley:volley:1.0.0' inside dependencies{}. baseUrl is the url where you are fetching the JSON from.

Then you can do something like:

JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET,
            baseUrl,
            null,
            new Response.Listener<JSONObject>() {

                @Override
                public void onResponse(JSONObject response) {

                    try {
                        // Parsing json object response
                        // response will be a json object
                        for (int i=0; i<response.length(); i++){
                            JSONObject obj = response.getJSONObject(i);

                            //id
                            //name
                            try{
                                for (int j=0; j<obj.length() ; j++) {
                                JSONObject description = obj.getJSONObject(j);
                                //title
                                //description
                                //push notification

                                }
                            } catch (JSONException e) {
                                 e.printStackTrace();
                                Toast.makeText(getApplicationContext(),
                                "Error: " + e.getMessage(),
                                Toast.LENGTH_LONG).show();
                            }


                        }

                    } catch (JSONException e) {
                        e.printStackTrace();
                        Toast.makeText(getApplicationContext(),
                                "Error: " + e.getMessage(),
                                Toast.LENGTH_LONG).show();
                    }

                    hidepDialog();

                }

            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError volleyError) {
            VolleyLog.d(TAG,"Error: "+ volleyError.getMessage() );
            Toast.makeText(getApplicationContext(), volleyError.getMessage(), Toast.LENGTH_SHORT).show();
            hidepDialog();
        }
    });
    //adding request to request queue
    AppController.getmInstance().addToRequestQueue(jsonObjReq);

Add this in your parseJSON(){} method or whatever you've named it.

I have not tried doing what you are trying do to. But it seems doable, with the use of volley library.

How to Parse Json Objects of Json Object and of Object (outdated)

3 Answers3