Question

我在这里有示例Json格式，我想使用android volley解析，但我遇到了错误：在org.json.JSONObject类型的入口处无法转换为JSONArray

    {
  "entry": {
    "": {
      "": "http:\/\/www.w3.org\/2005\/Atom",
      "m": "http:\/\/schemas.microsoft.com\/ado\/2007\/08\/dataservices\/metadata",
      "d": "http:\/\/schemas.microsoft.com\/ado\/2007\/08\/dataservices"
    },
    "FOO_BLOCK": {
      "BAR_xmlbase": "https:\/\/ab.com:443\/dap\/opu\/odata\/dap\/BATCH_SRV\/"
    },
    "id": {
      "TEXT": "https:\/\/ab.com:443\/dap\/opu\/odata\/dap\/BATCH_SRV\/BatchSet('1000')"
    },
    "title": {
      "FOO_BLOCK": {
        "BAR_type": "text"
      },
      "TEXT": "BatchSet('1000')"
    },
    "updated": {
      "TEXT": "2018-06-05T13:45:24Z"
    },
    "category": {
      "FOO_BLOCK": {
        "BAR_term": "BATCH_SRV.Batch",
        "BAR_scheme": "http:\/\/schemas.microsoft.com\/ado\/2007\/08\/dataservices\/scheme"
      },
      "TEXT": "NULL"
    },
    "link": {
      "FOO_BLOCK": {
        "BAR_href": "BatchSet('1000')",
        "BAR_rel": "self",
        "BAR_title": "Batch"
      },
      "TEXT": "NULL"
    },
    "content": {
      "FOO_BLOCK": {
        "BAR_type": "application\/xml"
      },
      "mproperties": {
        "dCharg": {
          "TEXT": 1000
        },
        "dICharg": {
          "TEXT": 1000
        },
        "dMaktx": {
          "TEXT": "No Material description avaibalbe"
        },
        "dStatus": {
          "TEXT": "Batch is unrestricted"
        },
        "dStock": {
          "TEXT": "NULL"
        }
      }
    }
  }
}

下面是我在android中编写的代码。

JsonObjectRequest arrReq = new JsonObjectRequest(Request.Method.GET, url, null,
                new Response.Listener<JSONObject >() {
                    @Override
                    public void onResponse(JSONObject  response) {
                        Log.e("FD", response.toString());
                        // Check the length of our response (to see if the user has any repos)
                        // Process the JSON
                        try{
                            // Get the JSON array
                            JSONArray jsonArray = response.getJSONArray("entry");
                            Log.e("FD", jsonArray.toString());


                            // Loop through the array elements
                            for(int i=0;i<array.length();i++){
                                // Get current json object
                                JSONObject data = array.getJSONObject(i);


                                String Charg = student.getString("Charg");
                                String Status = student.getString("Status");

                                // Display the formatted json data in text view

                                addToRepoList(Charg , Status );
                            }

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

                    }
                },

                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        // If there a HTTP error then add a note to our repo list.
                        setRepoListText("Error while calling REST API");
                        Log.e("Volley", error.toString());
                    }
                }
        );

但是我在Android中解析时遇到了错误。错误是 - JSONObject无法转换为JSONArray

任何人都可以提供示例代码来解析这个json数组。

Answer 1

您的entry不是JSONOArray，而是JSONObject。在你的json响应中，没有JSONArray

尝试这样的事情：

JSONObject entryObj = response.getJSONObject("entry")

然后：

JSONObject fooBlockObj = entryObj.getJSONObject("FOO_BLOCK")
...
JSONObject contentObj = entryObj.getJSONObject("content")
JSONObject mProperties = contentObj.getJSONObject("mproperties")
JSONObject dCharg = mProperties.getJSONObject("dCharg")
JSONObject dStatus = mProperties.getJSONObject("dStatus")

最后

String charg = dCharg.getString("TEXT")
String status = dStatus.getString("TEXT")

Answer 2

您的var loggerFactory = new LoggerFactory(); var identityServerCors = new DefaultCorsPolicyService(loggerFactory.CreateLogger<DefaultCorsPolicyService>()) { AllowAll = true };不包含json response。应该注意的一些问题是

json array是一个json对象，但您将其解析为数组
您正在尝试从json中获取密钥entry，这些密钥甚至不在响应中（而是Charg, Status存在，这可能是您想要的密钥）

如果您需要获取密钥dCharg, dStatus，请检查以下内容

Charg, Status

使用volley在android中解析嵌套的json数组？

2 个答案: