Unable parse the json data in android even by following the actual procedure

Question

iam trying to parse the json data which is shown below.i got output for other Json response by following this procedure but for this i cant get data.

{
"totalResults": 7,
"startIndex": 1,
"hasMoreResults": false,
"itemsPerPage": 10,
"results": [
    {
        "offering_temp_id": {
            "displayName": "Cool Course",
            "id": "cours000000000004841",
            "course_no": "00006081",
            "version": null
        },
        "delivery_id": {
            "displayName": "Instructor-Led",
            "id": "eqcat000000000000004"
        },
        "student_id": {
            "id": "emplo000000006156648",
            "displayName": "Venkat Rao",
            "person_no": "VRAO"
        },
        "reg_no": "00008341",
        "wlist_on": "2017-08-17T08:59:39.843-0400",
        "wlist_priority": 5,
        "Max_Count": null,
        "Current_Count": null,
        "is_no_show": false,
        "is_walk_in": false,
        "offering_action_id": {
            "id": "ofapr000000000013441",
            "displayName": "00009081"
        },
        "class_id": {
            "id": "class000000000006981",
            "displayName": "Cool Course"
        },
        "elements_to_complete": 0,
        "status": "100",
        "id": "regdw000000000012581"
    },
    // total 7 fields
],
"facets": []

}

And iam using the parser procedure as follows

public class EnrollmentParser {
public ArrayList<EnrollmentData> getData(String respnose)//EnrollmentData is my pojo class contains 4 strings and its getters and setters
{
    ArrayList<EnrollmentData> dataList = new ArrayList<>();
    try {
        JSONObject mainObj = new JSONObject(respnose);
        JSONArray array = mainObj.getJSONArray("results");
        for(int i = 0;i<array.length();i++)
        {
            EnrollmentData data = new EnrollmentData();
            JSONObject resObj = array.getJSONObject(i);
            data.setReg_num(resObj.getString("reg_no"));
            data.setElements_to_complete(resObj.getString("elements_to_complete"));
            data.setW_list_on(resObj.getString("wlist_on"));
            data.setW_list_priority(resObj.getString("wlist_priority"));
            dataList.add(data);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }


    return dataList;
}

}

when iam trying to display the dataList returned from above method i didnt get any data i got response like

Suggest me any changes that are required to get the response

Pavneet_Singh · Answer 1 · 2017-08-17T15:12:28.987

2

There is no faulty parsing code, everything is fine (although better use optString).

By default , the toString function will return the type '@' reference value so

You need to override toString in EnrollmentData class to see the actual content inside EnrollmentData object

You can also collect your list objects as single string using

String str = Arrays.toString(yourList.toArray());

How to print out all the elements of a List in Java?

edited Aug 17 '17 at 15:12

answered Aug 17 '17 at 14:59

Pavneet_Singh

36,884
5
53
68

Hai.. I have tries optString() but no change.And i didnt get the below toString() overriding and i didnt find any references to can you tell me clearly?where i have to override that. – durgaprasad kalapati Aug 17 '17 at 16:58
you have to override `toString` in `EnrollmentData` class https://www.javatpoint.com/understanding-toString()-method and for `optString` try reading https://stackoverflow.com/questions/5015844/parsing-json-object-in-java/40828056#40828056 – Pavneet_Singh Aug 17 '17 at 17:23

score 0 · Answer 2 · answered Aug 17 '17 at 15:15

0

Why don't you use Gson to convert json into object easily instead of getting the field and set them one by one?

You may check out https://github.com/google/gson

answered Aug 17 '17 at 15:15

Rice

155
3
11

Unable parse the json data in android even by following the actual procedure

2 Answers2