Got stuck at this error:
3169-3190/com.meisolsson.app E/JSON Parser﹕ Error parsing data org.json.JSONException: Value [{"type":0,"can_see_custom_stories":true,"display":"","name":"jenniaim"},{"type":0,"can_see_custom_stories":true,"display":"","name":"lucasgardebrand"},{"type":0,"can_see_custom_stories":true,"display":"","name":"herr_anderzzon"},{"type":0,"can_see_custom_stories":true,"display":"","name":"chrillebile"},{"type":0,"can_see_custom_stories":true,"display":"","name":"meisolsson"},{"type":0,"can_see_custom_stories":true,"display":"","name":"sakanapanda"},{"type":0,"can_see_custom_stories":true,"display":"Team Snapchat","name":"teamsnapchat"},{"type":0,"can_see_custom_stories":true,"display":"","name":"fabianlindfors"},{"type":0,"can_see_custom_stories":true,"display":"Katja","name":"katjaawesome"},{"type":0,"can_see_custom_stories":true,"display":"","name":"swimkey"},{"type":1,"can_see_custom_stories":true,"display":"","name":"agnesholmberg"}] of type org.json.JSONArray cannot be converted to JSONObject
So here is the code:
public class JSONParser extends AsyncTask<Void, Void, Boolean> {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("username", LoginActivity.Suser));
nameValuePairs.add(new BasicNameValuePair("password", LoginActivity.Spass));
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
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();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
@Override
protected Boolean doInBackground(Void... params) {
getJSONFromUrl("http://flapplabs.se/development/snapchat/friends.php");
return null;
}
}
We can also add a JSONArray to JSONObject. We need to add a few items to an ArrayList first and pass this list to the put() method of JSONArray class and finally add this array to JSONObject using the put() method.
A JSONArray is an ordered sequence of values. Its external text form is a string wrapped in square brackets with commas separating the values. The internal form is an object having get and opt methods for accessing the values by index, and put methods for adding or replacing values.
jsonObject. put("key", "value"); Create a JSON array by instantiating the JSONArray class and add, elements to the created array using the add() method of the JSONArray class.
The size of a JSON array is the number of elements. As JSON arrays are zero terminated, the size of a JSON array is always the last index + 1.
Even though I had a single JSON object it was stored in an array as Hariharan has pointed out with the square brackets [ { items:items, ... } ]
My solution was simply to parse out the only object, located in array position [0] like this
JSONArray jsonArray = new JSONArray(stringIn);
JSONObject obj = jsonArray.getJSONObject(0);
[..]
means it should be an JSONArray
and {..}
means it should be a JSONObject
.
Therefore:
try {
JSONArray jObj = new JSONArray(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
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