java - 将 JSONArray 转换为 JSONObject 时发生 ClassCastException

Question

这是我的代码 fragment :

    jArray = jChild.getJSONArray("users");
                    for (int i = 0; i < jArray.length(); i++) {
                        JSONObject jObject = (JSONObject) jArray.get(i);    //Exception thrown in this line

}

编辑:

日志猫:

09-30 09:06:23.404: E/AndroidRuntime(4011): java.lang.RuntimeException: An error occured while executing doInBackground()
09-30 09:06:23.404: E/AndroidRuntime(4011):     at android.os.AsyncTask$3.done(AsyncTask.java:200)
09-30 09:06:23.404: E/AndroidRuntime(4011): Caused by: java.lang.ClassCastException: java.lang.String
09-30 09:06:23.404: E/AndroidRuntime(4011):     at com.example.DbAccess.loadMonthView(DbAccess.java:196)

这是我的 jsonArray:

 [{"uid":"6","status":"absent","name":"xyz"},{"uid":"7","status":"absent","name":"abc Paul"}]

我想从 JSONArray 检索 JSONObject。

Answer 1

[ // represents json array node
    {     // represents json obeject node  
        "uid": "6",
        "status": "absent",
        "name": "xyz"
    },
    {
        "uid": "7",
        "status": "absent",
        "name": "abc Paul"
    }
]

你拥有的是一个 JSONArray。您需要解析这些值并获取字符串。

     JSONArray jr = new JSONArray("myjsonstring");
     for(int i=0;i<jr.length();j++)
     {
     JSONOBject jb = jr.getJSONObject(i);
     String uid = jb.getString("uid");
     String status = jb.getString("status");
     String name = jb.getString("name");  
     }