com.android.volley.ParseError:org.json.JSONException:org.json.JSONArray类型的值[{}]无法转换为JSONObject

时间:2018-06-06 06:04:14

标签: android android-volley jsonobjectrequest

jsondata:

  

[{ “PRODUCT_ID”: “2”, “PRODUCT_TITLE”: “测试”, “product_thumbnail”: “”, “PRODUCT_DESCRIPTION”: “测试”, “product_place”: “”, “product_user”: “1” “product_store”: “”, “product_date”: “1546875653”, “product_cost”: “”, “product_off”: “”},{ “PRODUCT_ID”: “3”, “PRODUCT_TITLE”: “测试1”,“product_thumbnail “:””, “PRODUCT_DESCRIPTION”: “测试1”, “product_place”: “”, “product_user”: “1”, “product_store”: “”, “product_date”: “1546875653”, “product_cost”: “”, “product_off”: “”}]

我收到此错误:

  

休息响应错误:: com.android.volley.ParseError:org.json.JSONException:Value [{“product_id”:“2”,“product_title”:“test”,“product_thumbnail”:“”,“product_description “:” 测试”, “product_place”: “”, “product_user”: “1”, “product_store”: “”, “product_date”: “1546875653”, “product_cost”: “”, “product_off”: “”} ,{ “PRODUCT_ID”: “3”, “PRODUCT_TITLE”: “测试1”, “product_thumbnail”: “”, “PRODUCT_DESCRIPTION”: “测试1”, “product_place”: “”, “product_user”: “1”,“product_store “:”“,”product_date“:”1546875653“,”product_cost“:”“,”product_off“:”}}]类型org.json.JSONArray无法转换为JSONObject

我的安卓代码:

_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());
    });

和AddRequest函数是:

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);}

你能帮我解决一下吗?

4 个答案:

答案 0 :(得分:0)

试试这个

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

答案 1 :(得分:0)

您的回复是JSONArray,但您正在执行JsonObjectRequest,因此您的Response.Listener也期待JSONObject。这就是凌空无法将JSONArray投射到JSONObject的原因。使用JsonArrayRequest。这样您的Response.Listener就会期待JSONArray

答案 2 :(得分:0)

试试这个会帮到你

在这里,你需要从你的回复中获取你的JSONArray

像这样

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();
        }
    }

让我知道它是否适合您。或者如果它对你有用,则标记它有用。

答案 3 :(得分:0)

错误来自这样一个事实,即您期望响应 JSONArray 作为您的 HTTP 请求的结果,但您创建了一个 JsonObjectRequest,它在 OnResponse 侦听器中具有一个 JSOnObject 参数

你需要做的是:

  • 创建一个 JsonArrayRequest

因此,您将一个 JSONArray 作为参数传递给 OnResponse 侦听器。

此链接非常有用,因为它提供了一个:android - Volley JSON Array request example

最后,你的 AddRequest 函数应该是这样的:

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);}