Android: parsing JSONArray key with iterator

Question

I am trying to parse a key from JSONArray which is:

{
    "server": [
       {
         "id": "1",
         "name": "Steve",
         "email": "[email protected]",
         "phone": "1001001000"
       }

    ]
}

Since, the key, which is id, name, email, and phone can be dynamically changed, we have to parse the result without teaching the key value. That is, the system has to parse both the key and the value. So I thought getting an array and using the iterator.hasNext() will solve the problem.

 JSONObject jsonObject = new JSONObject(stringBuilder.toString().trim());
            JSONArray jsonArray = jsonObject.getJSONArray("server");
            for (int current = 0; current < jsonArray.length(); current++){
                JSONObject json_object = jsonArray.getJSONObject(current);
                Iterator iterator = json_object.keys();
                while (iterator.hasNext()){
                    hashMap.put(iterator.next().toString(), json_object.getString(iterator.next().toString()));
                }
            }

It doesn't work properly whether changing the iterator to jsonObject.keys() or json_object.keys(), but only parses the key value of "id", and can't parse the name, email, phone.

This is how I get the JSON file:

$result = mysqli_query($conn, $sql);
$data = array();
if ($result){
     while($row=mysqli_fetch_array($result)){
        array_push($data,
            array('id'=>$row[1],
            'name'=>$row[2],
            'email'=>$row[3],
            'phone'=>$row[4]
        ));
 }
header('Content-Type: application/json; charset=utf8');
$json = json_encode(array("server"=>$data), JSON_PRETTY_PRINT+JSON_UNESCAPED_UNICODE);
echo $json;

yes after each one comma needed. It's just editing mistake i think — Death-is-the-real-truth
– Death-is-the-real-truth, Commented Sep 1, 2018 at 5:05

AskNilesh · Accepted Answer · 2018-09-01 05:13:43Z

1

Try this

    JSONObject jsonObject = null;
    try {
        jsonObject = new JSONObject(loadJSONFromAsset());
        JSONArray jsonArray = jsonObject.getJSONArray("server");
        for (int current = 0; current < jsonArray.length(); current++){
            JSONObject json_object = jsonArray.getJSONObject(current);
            Iterator iterator = json_object.keys();

            while( iterator.hasNext() ) {

                String key = (String)iterator.next();
                if ( json_object.get(key) instanceof String ) {
                    hashMap.put(key, json_object.getString(key));
                }
            }
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }

    Log.e("OUTPUT", Arrays.asList(hashMap).toString());

OUTPUT

edited Sep 1, 2018 at 5:13

answered Sep 1, 2018 at 5:08

AskNilesh

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10 Comments

Mium Over a year ago

I only get id=1, what's the problem?

AskNilesh Over a year ago

@Mium didn't get you

Mium Over a year ago

I only get one of the outputs, not the full result.

Mium Over a year ago

can getting JSONObject using stringbuilder.toString() be a problem?

Mium Over a year ago

Solved! Thanks for the assistance!

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