JSON类型不匹配或org.json.jsonecxeption

bxfogqkk 于 2022-12-01 发布在其他

关注(0)|答案(9)|浏览(121)

链接为http://iipacademy.in/askpoll/ten_feed.php
异常位于onPostExecute（）方法中（第4行）：

Log.i("result", result);
try {
    if (result != null) {
        JSONArray jsonArray = new JSONArray(result); // erreor
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject objJson = jsonArray.getJSONObject(i);

            TopTenGetterSetter obj = new TopTenGetterSetter();  

            obj.setQ(objJson.getString("question"));
            obj.setA(objJson.getString("option1"));
            obj.setB(objJson.getString("option2"));
            obj.setC(objJson.getString("option3"));
            obj.setD(objJson.getString("option4"));

            polls.add(obj);
                        }

    }
} catch (JSONException e) {
    e.printStackTrace();
    Toast.makeText(getApplicationContext(), "error",
            Toast.LENGTH_SHORT).show();
}

日志：

12-18 03:20:45.447: W/System.err(2790): org.json.JSONException: Value response of type java.lang.String cannot be converted to JSONArray
12-18 03:20:45.447: W/System.err(2790):     at org.json.JSON.typeMismatch(JSON.java:111)
12-18 03:20:45.447: W/System.err(2790):     at org.json.JSONArray.<init>(JSONArray.java:91)
12-18 03:20:45.447: W/System.err(2790):     at org.json.JSONArray.<init>(JSONArray.java:103)
12-18 03:20:45.447: W/System.err(2790):     at com.example.askpollie.LatestPollParticipated$FetchingEventsDetails.onPostExecute(LatestPollParticipated.java:188)
12-18 03:20:45.447: W/System.err(2790):     at com.example.askpollie.LatestPollParticipated$FetchingEventsDetails.onPostExecute(LatestPollParticipated.java:1)
12-18 03:20:45.447: W/System.err(2790):     at android.os.AsyncTask.finish(AsyncTask.java:631)
12-18 03:20:45.447: W/System.err(2790):     at android.os.AsyncTask.access$600(AsyncTask.java:177)
12-18 03:20:45.447: W/System.err(2790):     at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
12-18 03:20:45.447: W/System.err(2790):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-18 03:20:45.447: W/System.err(2790):     at android.os.Looper.loop(Looper.java:137)
12-18 03:20:45.447: W/System.err(2790):     at android.app.ActivityThread.main(ActivityThread.java:5103)
12-18 03:20:45.447: W/System.err(2790):     at java.lang.reflect.Method.invokeNative(Native Method)
12-18 03:20:45.447: W/System.err(2790):     at java.lang.reflect.Method.invoke(Method.java:525)
12-18 03:20:45.447: W/System.err(2790):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
12-18 03:20:45.447: W/System.err(2790):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-18 03:20:45.447: W/System.err(2790):     at dalvik.system.NativeStart.main(Native Method)
12-18 03:20:45.447: D/dalvikvm(2790): GC_FOR_ALLOC freed 5131K, 55% free 4437K/9672K, paused 2ms, total 2ms

消息是一个数组，那么它的代码应该是什么，或者如何求解？
提前感谢......

JSON

来源：https://stackoverflow.com/questions/20653106/json-type-mismatch-or-org-json-jsonecxeption

9条答案

按热度按时间

zkure5ic1#

org.json.JSONException: Value response of type java.lang.String cannot be converted to JSONArray

响应似乎是字符串而不是json数组

{  // json object node 
    "response": { // json object response
        "result": 1,
        "Message": [ // json array Message
            {        // json object node 
                "pollid": "98",
                 "category": "Entertainment",
                 "question": "what",  //  string
                 "option1": "981.mov",

结果是json对象而不是json数组

JSONArray jsonArray = new JSONArray(result);

应该是

JSONObject jObj = new JSONObject(result);
JSONObject response = jObj.getJSONObject("response");
//JSONObject jb = new JSONObject(response);
JSONArray jr = response.getJSONArray("Message");
for(int i=0;i<jr.length();i++)
{
JSONObject jb1 = jr.getJSONObject(i);
String question = jb1.getString("question");
Log.i(".......",question);
}

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uajslkp62#

结果不是数组，消息是。

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izkcnapc3#

试试这个：

Log.i("result", result);
try {
    if (result != null) {
        JSONObject jObject = new JSONObject(result);
        JSONArray jsonArray = jObject.getJSONObject("response").getJSONArray("Message");
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject objJson = jsonArray.getJSONObject(i);

            TopTenGetterSetter obj = new TopTenGetterSetter();  
            /*
             * [{"job_id":"1","job_staff_id":"","job_name":"Account",
             * "job_detail":"test\r\ntesds","job_start_date":
             * "2013-11-08"
             * ,"job_end_date":"2013-11-10","job_amount":"500"
             * ,"job_progress":"","job_complete_status":"0"}]
             */

            obj.setQ(objJson.getString("question"));
            obj.setA(objJson.getString("option1"));
            obj.setB(objJson.getString("option2"));
            obj.setC(objJson.getString("option3"));
            obj.setD(objJson.getString("option4"));

            polls.add(obj);
            // am = Customer.info.get(pos).getJamount();

            // Toast.makeText(getApplicationContext(), am + result,
            // Toast.LENGTH_LONG).show();
        }

    }
} catch (JSONException e) {
    e.printStackTrace();
    Toast.makeText(getApplicationContext(), "error",
            Toast.LENGTH_SHORT).show();
}

正如mario和nfear所说，您试图将一个JSONObject转换成一个JSONArray。

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gijlo24d4#

字符串内容JSONObject作为根元素，而不是JSONArray.to从String获取Message JSONArray，您应该首先获取response JSONObject，然后获取Message JSONArray，如下所示：

JSONObject jsonobj = new JSONObject(result);
 // get response JSONObject

 JSONObject jsonobj_response = jsonobj.getJSONObject("response");

// get Message JSONArray from jsonobj_response

 JSONArray jsonArray = jsonobj_response.getJSONArray("Message");
  // your code here.....

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tcomlyy65#

试试这个

try {
    if (result != null) {
        JSONArray jsonArray = new JSONObject(result).getJSONObject("response").getJSONArray("Message");
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject objJson = jsonArray.getJSONObject(i);

            TopTenGetterSetter obj = new TopTenGetterSetter();  
            /*
             * [{"job_id":"1","job_staff_id":"","job_name":"Account",
             * "job_detail":"test\r\ntesds","job_start_date":
             * "2013-11-08"
             * ,"job_end_date":"2013-11-10","job_amount":"500"
             * ,"job_progress":"","job_complete_status":"0"}]
             */

            obj.setQ(objJson.getString("question"));
            obj.setA(objJson.getString("option1"));
            obj.setB(objJson.getString("option2"));
            obj.setC(objJson.getString("option3"));
            obj.setD(objJson.getString("option4"));

            polls.add(obj);
            // am = Customer.info.get(pos).getJamount();

            // Toast.makeText(getApplicationContext(), am + result,
            // Toast.LENGTH_LONG).show();
        }

    }
}

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lqfhib0f6#

您发布的JSON具有

// Key "response" , Value type JsonObject

 JSONObject jsonObject=jsonObjectOfRsponse.getJsonObject(key);

//Key "Message" , Value type Json Array

 JSONArray jsonArray=jsonObject.getJsonArray(key);

获取jsonArray后，在循环中使用它，根据Json中的值的类型解析Json。
因此，请检查您是否根据json所持有的值的类型来解析json。

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qcuzuvrc7#

Value response of type java.lang.String cannot be converted to JSONArray

您正在尝试将单一对象转换成数组。

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lh80um4z8#

最好使用GSON库而不是手动解析它。GSON你可以在goggling上找到它。并给出了示例。

赞(0）回复(0）举报 2022-12-01

2ledvvac9#

例如，如果您有一个如下所示的json代码，则需要了解JSONArray字符串包含在**[]中，而JSONObject字符串包含在{}**中

[
{
userId: 1,
id: 1,
title: "sunt aut facere repellat provident occaecati excepturi optio reprehenderit",
body: "quia et suscipit
suscipit recusandae consequuntur expedita et cum
reprehenderit molestiae ut ut quas totam
nostrum rerum est autem sunt rem eveniet architecto"
}
]

在这种情况下，您需要调用JSONArray类并让它获取JSONObject

// Json Array []
JSONArray data = new JSONArray(jsonData);


// JSON Object {}`
  for(int i=0; i<data.length(); i++){
       JSONObject object =  data.getJSONObject(i);
    }

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JSON类型不匹配或org.json.jsonecxeption

9条答案

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