Get JSONArray without array name?

android, arrays, json

Solution

You don't need to call `json.getJSONArray()` at all, because the JSON you're working with already is an array. So, don't construct an instance of `JSONObject`; use a `JSONArray`. This should suffice:

// ...
JSONArray json = new JSONArray(result);
// ...

for(int i=0;i<json.length();i++){                        
    HashMap<String, String> map = new HashMap<String, String>();    
    JSONObject e = json.getJSONObject(i);

    map.put("id",  String.valueOf(i));
    map.put("name", "Earthquake name:" + e.getString("eqid"));
    map.put("magnitude", "Magnitude: " +  e.getString("magnitude"));
    mylist.add(map);            
}

You can't use exactly the same methods as in the tutorial, because the JSON you're dealing with needs to be parsed into a `JSONArray` at the root, not a `JSONObject`.

Problem

I'm new to JSON and trying this tutorial: http://p-xr.com/android-tutorial-how-to-parse-read-json-data-into-a-android-listview/#comments I'm new to JSON, C languages, Java and also Android, but am learning. The tutorial uses what I'm calling a named array, but all of the JSON i'm going to be using in my android project will use simple table rows with no named array. Examples of the JSON i'm using and the earthquake json from the tutorial are below. The tutorial iterates through the earthquake array and converts into a JAVA hashmap list using the following code: ``` JSONArray earthquakes = json.getJSONArray("earthquakes"); for(int i=0;i<earthquakes.length();i++){ HashMap<String, String> map = new HashMap<String, String>(); JSONObject e = earthquakes.getJSONObject(i); map.put("id", String.valueOf(i)); map.put("name", "Earthquake name:" + e.getString("eqid")); map.put("magnitude", "Magnitude: " + e.getString("magnitude")); mylist.add(map); } ``` My question is, how can I use `json.getJSONArray("")` if my JSON is just simple as below? I can convert the rest of the code, I just need to know how to load that JSON using the `getJSONArray("strJsonArrayName")` if I don't have a `strJsonArrayName`. My JSON (UnNamed Array) ``` [ { "cnt":1, "name":"American", "pk":7 }, { "cnt":2, "name":"Celebrities", "pk":3 }, { "cnt":1, "name":"Female", "pk":2 }, { "cnt":1, "name":"Language", "pk":8 }, { "cnt":1, "name":"Male", "pk":1 }, { "cnt":1, "name":"Region", "pk":9 } ] ``` Tutorial's JSON (Named Array) ``` { "earthquakes":[ { "eqid":"c0001xgp", "magnitude":8.8, "lng":142.369, "src":"us", "datetime":"2011-03-11 04:46:23", "depth":24.4, "lat":38.322 }, { "eqid":"c000905e", "magnitude":8.6, "lng":93.0632, "src":"us", "datetime":"2012-04-11 06:38:37", "depth":22.9, "lat":2.311 }, { "eqid":"2007hear", "magnitude":8.4, "lng":101.3815, "src":"us", "datetime":"2007-09-12 09:10:26", "depth":30, "lat":-4.5172 }, { "eqid":"c00090da", "magnitude":8.2, "lng":92.4522, "src":"us", "datetime":"2012-04-11 08:43:09", "depth":16.4, "lat":0.7731 }, { "eqid":"2007aqbk", "magnitude":8, "lng":156.9567, "src":"us", "datetime":"2007-04-01 18:39:56", "depth":10, "lat":-8.4528 }, { "eqid":"2007hec6", "magnitude":7.8, "lng":100.9638, "src":"us", "datetime":"2007-09-12 21:49:01", "depth":10, "lat":-2.5265 }, { "eqid":"a00043nx", "magnitude":7.7, "lng":100.1139, "src":"us", "datetime":"2010-10-25 12:42:22", "depth":20.6, "lat":-3.4841 }, { "eqid":"2010utc5", "magnitude":7.7, "lng":97.1315, "src":"us", "datetime":"2010-04-06 20:15:02", "depth":31, "lat":2.3602 }, { "eqid":"2009mebz", "magnitude":7.6, "lng":99.9606, "src":"us", "datetime":"2009-09-30 08:16:09", "depth":80, "lat":-0.7889 }, { "eqid":"2009kdb2", "magnitude":7.6, "lng":92.9226, "src":"us", "datetime":"2009-08-10 17:55:39", "depth":33.1, "lat":14.0129 } ] } ``` In the tutorial, based on the answers from @MДΓΓ БДLL and @Cody Caughlan , I was able to reformat the JSONFunctions.getJSONFromURL into a JSONArray instead of a JSONObject. Here is my modified working code, thank you! ``` public class JSONfunctions { public static JSONArray getJSONfromURL(String url){ InputStream is = null; String result = ""; JSONArray jArray = null; HttpClient httpclient = new DefaultHttpClient(); HttpGet httpget = new HttpGet(url); HttpResponse response = httpclient.execute(httpget); HttpEntity entity = response.getEntity(); is = entity.getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8); StringBuilder sb = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } is.close(); result=sb.toString(); jArray = new JSONArray(result); return jArray; } } ```

Original source