How to parse array into array JSON

Question

first of all I wanted to know if the structure of the json is correct, you can find the JSON here:

http://demo8461125.mockable.io/whitemage

if it is correct I would like to know how to parse "PANINI" , is an array inside an array "tipopietanza"

 JSONArray arr = response.getJSONArray("pietanze");
                            for (int i = 0; i < arr.length(); i++)
                            {

                                JSONArray pietanze = response.getJSONArray("PANINI");
                                List<Pietanze> listapietanze =new ArrayList<>(pietanze.length());

                                for(int j=0;j<pietanze.length();j++)
                                {
                                    Pietanze tmp = new Pietanze();
                                    tmp.setNome(pietanze.getJSONObject(j).getString("nomepietanza"));
                                    listapietanze.add(tmp);
                                }
                                expandableListDetail.put(arr.getJSONObject(i).getString("tipopietanza"), listapietanze);
                            }

inside for loop, JSONObject jsonChild = arr.getJSONObject(i); if(jsonChild.has("PANINI"){ JSONArray pietanze = jsonChild .getJSONArray("PANINI"); } — Samir Mangroliya
– Samir Mangroliya, Commented Mar 27, 2019 at 9:14
"I wanted to know if the structure of the json is correct" - Use one of the many online JSON Formatters/Validators. — PPartisan
– PPartisan, Commented Mar 27, 2019 at 9:14
@SamirMangroliya i think you mean to edit like this codeshare.io/UbKVU but it don't work — Feinster
– Feinster, Commented Mar 27, 2019 at 9:54

Michał Ziober · Accepted Answer · 2019-03-27 09:35:28Z

1

Yes, it should work, but I suggest just use Gson:

Type type = new TypeToken<List<TipiPaniniAndServizi>>(){}.getType();
List<TipiPaniniAndServizi> tipiPaniniAndServizi = gson.fromJson(json, type);

And save your time from manipulate JSON, just think about your java objects.

edited Mar 27, 2019 at 9:35

Michał Ziober

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answered Mar 27, 2019 at 9:14

Luigi Blu

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Comments

Sahil Kothari · Accepted Answer · 2019-03-27 11:45:13Z

0

JSON structure is okay.

You need to do minor changes in your code for getting list properly.

JSONArray arr = response.getJSONArray("pietanze");
for (int i = 0; i < arr.length(); i++) {
    JSONObject jsonObject = arr.getJSONObject(i);

    if(jsonObject.has("PANINI")) {
        JSONArray paniniJsonArray = jsonObject.getJSONArray("PANINI");
        List<Panini> listPanini = new ArrayList<>();

        for (int j = 0; j < paniniJsonArray.length(); j++) {
            Panini panini = new Panini();
            panini.setId(paniniJsonArray.getJSONObject(j).getString("id"));
            panini.setNomepietanza(paniniJsonArray.getJSONObject(j).getString("nomepietanza"));
            panini.setPrezzo(paniniJsonArray.getJSONObject(j).getString("prezzo"));
            listPanini.add(panini);
        }
        expandableListDetail.put(arr.getJSONObject(i).getString("tipopietanza"), listPanini);
    }
}

edited Mar 27, 2019 at 11:45

answered Mar 27, 2019 at 11:19

Sahil Kothari

1306 bronze badges

4 Comments

Feinster Over a year ago

It shows me the ListDetail, but when I try to open it the app crashes without showing me the contents of the list

Sahil Kothari Over a year ago

@Mattek can you please provide more of your code or send me activity code where I can check rest code. Because i don't think so it is crashing because of list and send some crash log too.

Feinster Over a year ago

Sorry my bad, obviously the program expected all the fields, and I have forgotten a field of "panini" in the jsp! IT WORKS!

Sahil Kothari Over a year ago

@Mattek If it was correct answer, then please approve it. Thanks

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