Parsing Nested JSON Objects using Volley

Question

I had gone through most of the answers in stack overflow and tried some of the answers which didn't work.

It is a response from a SOAP API.

I tried by using

JSONObject obj = new JSONObject(response);
JSONArray heroArray = new JSONArray();
JSONObject one = obj.getJSONObject("getProjectDetailsResult");
JSONObject two = one.getJSONObject("NewDataSet");
heroArray= two.getJSONArray("Rec");

for (int i = 0; i < heroArray.length(); i++) {
    JSONObject heroObject = heroArray.getJSONObject(i);
    Hero hero = new Hero(heroObject.getString("decProjectID"), 
heroObject.getString("chvProjectNameEng"));

This is what I am getting in the LogCat

2019-12-08 15:00:47.572 6134-6134/net.marvelheroes W/System.err: org.json.JSONException: Value {"decProjectID":"100300230049","intProjectSlNo":"49",......"percentage":"0"} at Rec of type org.json.JSONObject cannot be converted to JSONArray
2019-12-08 15:00:47.572 6134-6134/net.marvelheroes W/System.err:     at org.json.JSON.typeMismatch(JSON.java:100)
2019-12-08 15:00:47.572 6134-6134/net.marvelheroes W/System.err:     at org.json.JSONObject.getJSONArray(JSONObject.java:588)

I tried

JSONObject heroArray = new JSONObject();
JSONObject one = obj.getJSONObject("getProjectDetailsResult");
JSONObject two = one.getJSONObject("NewDataSet");
heroArray= two.getJSONObject("Rec");

But I am getting error for the rest of the code. I am testing this with the sample from https://www.simplifiedcoding.net/android-volley-tutorial-fetch-json/

Md. Asaduzzaman · Accepted Answer · 2019-12-08 12:52:48Z

1

Rec is not JSONArray, it's JSONObject. Try using

try {
    JSONObject obj = new JSONObject(response);
    JSONObject one = obj.getJSONObject("getProjectDetailsResult");
    JSONObject two = one.getJSONObject("NewDataSet");

    if(two.get("Rec") instanceof JSONArray) {

        JSONArray heroArray = two.getJSONArray("Rec");

        for (int i = 0; i < heroArray.length(); i++) {

            JSONObject heroObject = heroArray.getJSONObject(i);

            Hero hero = new Hero(heroObject.getString("decProjectID"),
                heroObject.getString("intProjectSlNo"),
                heroObject.getString("chvProjectName"),
                heroObject.getString("chvProjectNameEng"),
                heroObject.getString("chrProjCatCode"),
                heroObject.getString("chvEngProjCategory"),
                heroObject.getString("nchvSecType"),
                heroObject.getString("chvEngSecType"),
                heroObject.getString("chvImplOfficerDesg"),
                heroObject.getString("chvImplOfficerDesgEng"),
                heroObject.getString("singleYrAmt"),
                heroObject.getString("TotExp"),
                heroObject.getString("percentage"));

            heroList.add(hero);
        }
    } else {
        JSONObject heroObject = two.getJSONObject("Rec");

        Hero hero = new Hero(heroObject.getString("decProjectID"),
            heroObject.getString("intProjectSlNo"),
            heroObject.getString("chvProjectName"),
            heroObject.getString("chvProjectNameEng"),
            heroObject.getString("chrProjCatCode"),
            heroObject.getString("chvEngProjCategory"),
            heroObject.getString("nchvSecType"),
            heroObject.getString("chvEngSecType"),
            heroObject.getString("chvImplOfficerDesg"),
            heroObject.getString("chvImplOfficerDesgEng"),
            heroObject.getString("singleYrAmt"),
            heroObject.getString("TotExp"),
            heroObject.getString("percentage"));

        heroList.add(hero);
    }
} catch ( Exception ex) {
    ex.printStackTrace();
}

edited Dec 8, 2019 at 12:52

answered Dec 8, 2019 at 11:06

Md. Asaduzzaman

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7 Comments

Jayan Dev Over a year ago

how do I iterate through the objects?

Md. Asaduzzaman Over a year ago

No need to iterate. It's give u Hero

Md. Asaduzzaman Over a year ago

And the property inside Rec is different. So you have to update your Hero model. Can you post your Hero model?

Md. Asaduzzaman Over a year ago

@JayanDev, have you got it?

Jayan Dev Over a year ago

I was trying to do it using Iterator

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