Converting JSONObject to JSONArray
<p>I'm currently learning some android programming with JAVA. My teacher shared this piece of code which will consume an API, get its JSON file, and convert it to a JSONArray file. Then he will Iterate through that JSONArray and put them into an ArrayList before displaying them onto an activity.</p>

<p>The problem is that the API that I'm consuming returns a JSONObject file instead, and I do not know how to properly convert this to JSONArray.</p>

<pre><code>import android.util.Log;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;

public class JSONParser {

String charset = "UTF-8";
HttpURLConnection conn;
DataOutputStream wr;
StringBuilder result;
URL urlObj;
JSONArray jObj = null;
StringBuilder sbParams;
String paramsString;

public JSONArray makeHttpRequest(String url, String method) {

    sbParams = new StringBuilder();

   if(method.equals("GET")){
        // request method is GET

        if (sbParams.length() != 0) {
            url += "?" + sbParams.toString();
        }

        try {
            urlObj = new URL(url);

            conn = (HttpURLConnection) urlObj.openConnection();

            conn.setDoOutput(false);

            conn.setRequestMethod("GET");


            conn.setRequestProperty("AccountKey", "pVU56+0hI26DNLeTzlU/Dw==");
            conn.setRequestProperty("UniqueUserId", "33c07f2f-b4c0-4151-acd3-e0829b303d2c");
            conn.setRequestProperty("accept", "application/json");

            conn.setConnectTimeout(15000);

            conn.connect();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    try {
        //Receive the response from the server
        InputStream in = new BufferedInputStream(conn.getInputStream());
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        result = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            result.append(line);
        }

        Log.d("JSON Parser", "result: " + result.toString());

    } catch (IOException e) {
        // e.printStackTrace();
    }

    conn.disconnect();

    // try parse the string to a JSON object
    try {

        jObj = new JSONArray(result.toString());
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }

    // return JSON Object
    return jObj;
}
</code></pre>

<p>}</p>

<p>API URL and its custom headers:</p>

<pre><code>URL: http://datamall2.mytransport.sg/ltaodataservice/TaxiAvailability
</code></pre>

<p>headers-</p>

<pre><code>AccountKey: pVU56+0hI26DNLeTzlU/Dw==
UniqueUserId: 33c07f2f-b4c0-4151-acd3-e0829b303d2c
accept: application/json
</code></pre>

<p>EDIT2: I use this to get my raw data with custom headers.
<a href="http://requestmaker.com/" rel="nofollow">http://requestmaker.com/</a></p>

<p>EDIT: This is the JSON that I get.</p>

<pre><code>{
  "odata.metadata": "http://datamall2.mytransport.sg/ltaodataservice/$metadata#TaxiAvailability",
  "value": [
    {
      "Longitude": 103.84009,
      "Latitude": 1.35989
    },
    {
      "Longitude": 103.84679,
      "Latitude": 1.35544
    },
    {
      "Longitude": 103.76928,
      "Latitude": 1.4419
    }
    ....
    ]
    }
</code></pre>