CODEWITHSUNDEEP
javaarraysjsonarraylist
Bryan Saltos
Bryan Saltos

Reputation: 83

Transform a JsonArray into an ArrayList

I have this json that i got using the YoutubeAPI :

{
 "items": [
  {
   "id": {
    "videoId": "ob1ogBV9_iE"
   },
   "snippet": {
    "title": "13 estrellas ",
    "description": "Pueden encontrar estas "
   }
  },
  {
   "id": {
    "videoId": "o9vsXyrola4"
   },
   "snippet": {
    "title": "Rayos Cósmicos ",
    "description": "Este es un programa piloto "
   }
  }
]
}

i want to save the fiel "id" on an ArrayList but i have some problems this is the code im using:

JSONArray jsonArray = myResponse.getJSONArray("items");

In this line im creating an JSONarray with the JSONobject i created first

ArrayList<String> list = new ArrayList<>();
for (int i = 0; i < jsonArray.length(); i++) {
    try {
        JSONObject json = jsonArray.getJSONObject(i);

        list.add(json.getString("videoID"));
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

My question is how can i access to this field? and how can i save it

Upvotes: 0

Views: 56

Answers (2)

azurefrog
azurefrog

Reputation: 10945

You've got two main issues. The first is that "videoID" and "videoId" are not the same string. So you're checking for a key that doesn't exist.

Your second problem is that the "videoId" key doesn't exist in the top level object, it's inside the "id" object, so you need to drill down an extra layer to get it:

    JSONArray jsonArray = myResponse.getJSONArray("items");
    ArrayList<String> list = new ArrayList<>();
    for (int i = 0; i < jsonArray.length(); i++) {
        try {
            JSONObject json = jsonArray.getJSONObject(i);
            JSONObject id = json.getJSONObject("id");

            list.add(id.getString("videoId"));
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    System.out.println(list);  // [ob1ogBV9_iE, o9vsXyrola4]

Upvotes: 1

sagarr
sagarr

Reputation: 1212

Try with correct case for videoId, like

list.add(json.getString("videoId"));

Upvotes: 0

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