使用Volley解析嵌套的JSON对象 [英] Parsing Nested JSON Objects using Volley

问题描述

我经历了堆栈溢出中的大多数答案，并尝试了一些无效的答案.

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

这是SOAP API的响应.

It is a response from a SOAP API.

我尝试使用

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"));

这就是我在LogCat中获得的东西

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)

我尝试了

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

但是其余的代码却出错了.我正在使用 https://www.simplifiedcoding.net的示例进行测试/android-volley-tutorial-fetch-json/

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/

推荐答案

Rec不是JSONArray，它是JSONObject.尝试使用

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();
}

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