android - (Android Volley) JSONObject 无法转换为 JSONArray

Question

我在 android 中解析 JSON 数据时遇到问题。

我的安卓代码

JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, server_url,null,
            new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    try {

                JSONArray jsonArray1=response.getJSONArray("employee");

                        for(int i=0;i<jsonArray1.length();i++)
                        {
                  JSONObject employe=jsonArray1.getJSONObject(i);

                 Log.d(TAG, "onResponse emp: "+employe.getString("name"));
                        }
                        }
                    catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            }

我的 JSON 数据

{"orgs":[{"id":1551,"employeeId":1501,"orgId":"1151","employeeOrgMembershipStatus":"MEMBER","employeeRole":"SUPER_ADMIN","lMb":"alvin","lMd":"2019-06-01T05:41:00Z"}],"employee":{"id":1501,"employeeStatus":"ACTIVE","userId":"SU9iegDhr3b9r3gCUZzXl9eQjEJ2","name":"Alvin J Babu","cB":"alvin","cD":"2019-06-24T05:41:00Z","lMb":"alvin","lMd":"2019-06-27T05:41:00Z","computedTotalActivityScore":5,"stars":2,"jobTitle":"Developer","visibility":"ORGANIZATION","asset":null,"reportsTo":null},"teams":[{"id":1601,"employeeId":1501,"teamId":"1251","employeeTeamMembershipStatus":"MEMBER","lMb":"alvin","lMd":"2019-06-25T05:41:00Z"}],"status":1}

我需要解析员工数组并从中获取姓名。

Answer 1

首先使用像jsonprettyprint.com这样的网站轻松阅读 json。

这是您的 json，格式更易读:

{
  "orgs": [
    {
      "id": 1551,
      "employeeId": 1501,
      "orgId": "1151",
      "employeeOrgMembershipStatus": "MEMBER",
      "employeeRole": "SUPER_ADMIN",
      "lMb": "alvin",
      "lMd": "2019-06-01T05:41:00Z"
    }
  ],
  "employee": {
    "id": 1501,
    "employeeStatus": "ACTIVE",
    "userId": "SU9iegDhr3b9r3gCUZzXl9eQjEJ2",
    "name": "Alvin J Babu",
    "cB": "alvin",
    "cD": "2019-06-24T05:41:00Z",
    "lMb": "alvin",
    "lMd": "2019-06-27T05:41:00Z",
    "computedTotalActivityScore": 5,
    "stars": 2,
    "jobTitle": "Developer",
    "visibility": "ORGANIZATION",
    "asset": null,
    "reportsTo": null
  },
  "teams": [
    {
      "id": 1601,
      "employeeId": 1501,
      "teamId": "1251",
      "employeeTeamMembershipStatus": "MEMBER",
      "lMb": "alvin",
      "lMd": "2019-06-25T05:41:00Z"
    }
  ],
  "status": 1
}

在 JSON 中，任何受 {} 限制的都是 JSONObject，任何受 [] 限制的都是 JSONArray。

在您的情况下，正如您在上面的 JSON 中看到的那样，键“employee”具有 JSONObject 值，而不是您在代码中编写的 JSONArray。

在获得“employee”键的 JSONObject 后，您可以使用 employee.getString("name") 直接从中获取“name”字符串。

进行上述更改后的代码将如下所示:

public void onResponse(JSONObject response) {
    try {
        JSONObject employee=response.getJSONObject("employee");
        String employeeName=employee.getString("name");
        Log.d(TAG, "onResponse emp: "+employeeName);
    }
    catch (JSONException e) {
        e.printStackTrace();
    }
}