How to parse nested json array in android using volley library

Question

I have nested json array in below format.I am using volley liabrary for JSON Parsing.

{
"City": [{
        "name": "Mumbai",
        "Mumbai": [{
            "area": "andheri",

            "diler": [{
                "DName": "yuvraj"
            }]
        }, {
            "area": "jogeshwari"
        }, {
            "area": "goregaon"
        }]
    },

    {

        "name": "Nashik",
        "Nashik": [{
            "area": "clg rd",
            "diler": [{
                "DName": "yuvraj"
            }]
        }, {
            "area": "GP RD",
            "diler": [{
                "DName": "Roshan"
            }]
        }, {
            "area": "CBS",
            "diler": [{
                "DName": "Deepak"
            }]
        }]

    }, {
        "name": "Bengaluru"
    }
]}

Below is the code which i have write in android.

   jsonURL = "http://192.168.1.11/cycle_webservices/testing.json";

    buttonReq.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(
                    jsonURL,
                    new Response.Listener<JSONArray>() {
                        @Override
                        public void onResponse(JSONArray response) {
                            try {
                                for (int i = 0; i < response.length(); i++) {
                                    JSONObject jsonObject = response.getJSONObject(i);
                                    String name = jsonObject.getString("name");
                                    String area = jsonObject.getString("area");
                                    String diler = jsonObject.getString("diler");

                                    textView.append("\nCity: " + name + "\nArea: " + area + "\nDealer: " + diler +   "\n");
                                }
                            } catch (JSONException e) {
                                e.printStackTrace();
                                Toast.makeText(getApplicationContext(), "Error: " + e.getMessage(), Toast.LENGTH_LONG).show();
                            }
                        }
                    },
                    new Response.ErrorListener() {
                        @Override
                        public void onErrorResponse(VolleyError error) {
                            Log.e("VOLLEY", "ERROR");
                            Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show();
                        }
                    }
            );
            requestQueue.add(jsonArrayRequest);
        }
    });

But i am getting Errors while parsing it in Android. The error is- JSONObject can not be converted to JSONArray

Can anyone please provide sample code to parse this json Array.

Thanks in Advance

Answer 1

Here is your problem solution, use below code

 try {
        JSONObject jsonObject = new JSONObject("response");
        JSONArray jsonArray = jsonObject.getJSONArray("City");
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject object = jsonArray.getJSONObject(i);
            String name = object.getString("name");
            if (object.length() != 0) {
                Iterator<String> key = object.keys();
                while (key.hasNext()) {
                    String cityname = key.next();
                    JSONArray ja = object.getJSONArray(cityname);
                    for (int j = 0; j < ja.length(); j++) {
                        JSONObject object1 = ja.getJSONObject(j);
                        String area = object1.getString("area");

                    }
                }
            }

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

And try to make your JSON format same.

Answer 2

The point is the first json node is a JsonObject, change your code this way and continue parsing:

new Response.Listener<JSONObject>() {
    @Override
    public void onResponse(JSONObject response) { 

Answer 3

Use JSONObject for parsing data like:

  JSONObject jsonObject = new JSONObject(response);

  JSONArray jsonArray = jsonObject.getJSONArray("City");

  for(int i = 0; i<jsonArray.length(); i++)
  {
      JSONObject jsonObject = jsonArray .getJSONObject(i);

      String name = jsonObject.getString("name");

      JSONArray city_array = jsonObject.getJSONArray(name);

      for(int j=0; j<city_array.length(); j++)
      {
          JSONObject obj = city_array.getJSONObject(j);

          String area = obj.getString("area");

          JSONArray diler_array = obj.getJSONArray("diler");

          JSONObject obj1 = diler_array.getJSONObject(0);

          String DName = obj1.getString("DName");
      }
  }

Please check edited answer.