Question

I need to be able to create a new JSONArray from the one I already have, in the array I have a whole lot of fields called id, another one on each line, how do I get a list of them?

eg. I get this back

[{"id":111,"users":"blob"},
 {"id":111,"users":"blob"},
 {"id":111,"users":"blob"},
 {"id":111,"users":"blob"},
 {"id":111,"users":"blob"},
 {"id":111,"users":"blob"}]

How would I get a list of just the ID’s ?

---

• Edit

Decided to use a for loop straight after this but thanks 😀

HttpResponse response = httpclient.execute(httpget); //execute the HttpPost request
JSONArray jsa =  projectResponse(response); //get the json response

for(int i = 0; i < jsa.length(); i++){
    JSONObject jso = jsa.getJSONObject(i);
    publishProgress(jso.getString("id"), jso.getString("name"));
}

Answer 1

Try this out:

JSONArray yourJSONArray;
List<String> tempIDStringCollection = new List<String>();
...

for(int i = 0; i < yourJSONArray.length(); i++){
        String id = yourJSONArray.getJSONObject(i).getString("id");
        tempIDStringCollection.add(id);
}

Then to transfer this into another JSONArray, try:

JSONArray newArray = new JSONArray(tempIDStringCollection);

To skip the List creation, try

JSONArray yourJSONArray;
JSONArray newArray = new JSONArray();
...

for(int i = 0; i < yourJSONArray.length(); i++){
        String id = yourJSONArray.getJSONObject(i).getString("id");
        newArray.put(i, id);
}