com.android.volley.ParseError: org.json.JSONException: Value [{}] of type org.json.JSONArray cannot be converted to JSONObject

Question

jsondata:

[{"product_id":"2","product_title":"test","product_thumbnail":"","product_description":"test","product_place":"","product_user":"1","product_store":"","product_date":"1546875653","product_cost":"","product_off":""},{"product_id":"3","product_title":"test1","product_thumbnail":"","product_description":"test1","product_place":"","product_user":"1","product_store":"","product_date":"1546875653","product_cost":"","product_off":""}]

I get this error:

Rest response error:: com.android.volley.ParseError: org.json.JSONException: Value [{"product_id":"2","product_title":"test","product_thumbnail":"","product_description":"test","product_place":"","product_user":"1","product_store":"","product_date":"1546875653","product_cost":"","product_off":""},{"product_id":"3","product_title":"test1","product_thumbnail":"","product_description":"test1","product_place":"","product_user":"1","product_store":"","product_date":"1546875653","product_cost":"","product_off":""}] of type org.json.JSONArray cannot be converted to JSONObject

my android code:

_httpHandler.addRequest(Request.Method.GET, "product", null, response -> {
        try {
            Log.e("response is:",response.toString());

            for (int i = 0; i < response.length(); i++) {
                JSONObject product = response.getJSONObject(String.valueOf(i));

                productList.add(new Product(
                        product.getString("product_id"),
                        product.getString("product_title"),
                        product.getString("product_thumbnail"),
                        product.getString("product_description"),
                        product.getString("product_place"),
                        product.getString("product_user"),
                        product.getString("product_store"),
                        product.getString("product_date"),
                        product.getString("product_off"),
                        product.getString("product_price")));
            }

            ProductAdapter adapter = new ProductAdapter(MainActivity.this, productList);
            recyclerView.setAdapter(adapter);

        } catch (JSONException e) {
            e.printStackTrace();
        }
    }, error -> {
        Toast.makeText(MainActivity.this, "Get Product Has Error", Toast.LENGTH_LONG).show();
        Log.e("Rest response error: ", error.toString());
    });

and AddRequest function is:

public void addRequest(int method, String url, JSONObject jsonRequest,
                       Response.Listener<JSONObject> listener, Response.ErrorListener errorListener) {
    url = api_url + url;
    Log.e("url is: ", url);
    JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(method, url, jsonRequest, listener, errorListener){
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String, String> params = new HashMap<String, String>();
            params.put("Content-Type","application/x-www-form-urlencoded");
            params.put("Accept", "application/json");
            return params;
        }
    };
    requestQueue.add(jsonObjectRequest);}

Can you help me to fix it?

Sandeep Parish · Accepted Answer · 2018-06-06 06:27:25Z

1

Try this it will help you

Here you need to get your JSONArray from your response

like this

try {
            JSONArray json = new JSONArray(response);

            for (int i = 0; i < json.length(); i++) {

                JSONObject product= json.getJSONObject(i);
                Log.e("json 1", product.getString("product_title"));

                productList.add(new Product(
                        product.getString("product_id"),
                        product.getString("product_title"),
                        product.getString("product_thumbnail"),
                        product.getString("product_description"),
                        product.getString("product_place"),
                        product.getString("product_user"),
                        product.getString("product_store"),
                        product.getString("product_date"),
                        product.getString("product_off"),
                        product.getString("product_price")));

            }
        ProductAdapter adapter = new ProductAdapter(MainActivity.this, productList);
        recyclerView.setAdapter(adapter);
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

Let me know if it works for you. or mark it helpful if it works for you.

edited Jun 6, 2018 at 6:27

answered Jun 6, 2018 at 6:21

Sandeep Parish

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4 Comments

Amin Over a year ago

No I have another json url that work correct!!!! I think json has problem!?

Sandeep Parish Over a year ago

it will work for you definatly as per your current response because your response has json Array at the top

Sandeep Parish Over a year ago

If you have json Object at top then you get json object first and then get json array from your object

Amin Over a year ago

thanks a lot. "json_encode($array)" changed to "json_encode($array, JSON_FORCE_OBJECT)", the problem was fixed. Thank you for your guide

Abu Yousuf · Accepted Answer · 2018-06-06 06:16:36Z

1

You response is JSONArray but you are executing JsonObjectRequest so your Response.Listener is alos expecting JSONObject. That's why volley can't cast JSONArray to JSONObject. Use JsonArrayRequest. So that your Response.Listener will expect JSONArray

answered Jun 6, 2018 at 6:16

Abu Yousuf

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Comments

Moulesh · Accepted Answer · 2018-06-06 06:13:04Z

0

try This

productList = new Gson().fromJson(response.toString(),new TypeToken<ArrayList<Category>>() {
    }.getType());

answered Jun 6, 2018 at 6:13

Moulesh

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Comments

Cherlan-Miche PHILIPPE · Accepted Answer · 2021-04-29 19:25:07Z

The error comes from the fact that you expect in response a JSONArray as result of your HTTP request but you make a JsonObjectRequest which has a JSOnObject parameter in the OnResponse listener

What you have to do is:

Make a JsonArrayRequest

As so, you will pass a JSONArray to the OnResponse listener as your parameter.

This link is very helpful because it provides an: android - Volley JSON Array request example

At the end, your AddRequest function should be something like this:

public void addRequest(int method, String url, JSONArray jsonRequest,
                   Response.Listener<JSONArray> listener, Response.ErrorListener errorListener) {
url = api_url + url;
Log.e("url is: ", url);
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(method, url, jsonRequest, listener, errorListener){
    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        Map<String, String> params = new HashMap<String, String>();
        params.put("Content-Type","application/x-www-form-urlencoded");
        params.put("Accept", "application/json");
        return params;
    }
};
requestQueue.add(jsonArrayRequest);}

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