We Keep Coding

JSONObject["name"] not a string

I've been trying for the last couple hours to fix this. I'm a little rusty when it comes to Java and decided I wanted to finish this method where I'm trying to parse the json to get the name of a map.
private static void mapLookUp (String mapId){
HttpClient httpclient = HttpClients.createDefault();
try
{
URIBuilder builder = new URIBuilder("https://www.haloapi.com/metadata/h5/metadata/maps");
URI uri = builder.build();
HttpGetWithEntity request = new HttpGetWithEntity(uri);
request.addHeader("ocp-apim-subscription-key", "aa09014c153b4a4b9c3a4937356e208a");
// Request body
StringEntity reqEntity = new StringEntity("{body}");
request.setEntity(reqEntity);
HttpResponse response = httpclient.execute(request);
HttpEntity entity = response.getEntity();
if (entity != null)
{
String response2request = EntityUtils.toString(entity);
//System.out.println(response2request.length()+"\n"+response2request);
String jsonString = "{\"Results\":"+response2request+"}";
System.out.println(jsonString);
JSONObject jsonResult = new JSONObject(jsonString);
List<String> mapName = new ArrayList<String>();
List<String> mapIds = new ArrayList<String>();
JSONArray array = jsonResult.getJSONArray("Results");
for(int i = 0 ; i < array.length() ; i++){
mapName.add(array.getJSONObject(i).getString("name"));
mapIds.add(array.getJSONObject(i).getString("id"));}
for(int i = 0 ; i < mapIds.size() ; i++)
if(mapIds.get(i).equals(mapId))
System.out.println("The most recent game was on "+mapName.get(i));
}
else
System.out.println("NULL");
}
catch (Exception e)
{
System.out.println("Caught exception");
System.out.println(e.getMessage());
}
}
In the output I get JSONObject["name"] not a string.

check JSON source. It seems like it may have no " around name value, or name is an object.
as example something like:
...
"name":John Doe,
...
or
"name":{"first":"John", "last":"Doe"},
...
BTW: Second is more expected. First must fail before, because it is wrong JSON. Value with no " around must be a number. But maybe name is empty like:
...
"name":,
...

How to get JSON Key/Value pairs with JSP [duplicate]

I'm very new to RESTFull WCF Services and even newer to calling them from an Android app. Here's my WCF service:
[ServiceContract]
public interface IPeople
{
[OperationContract]
void DoWork();
[WebGet(UriTemplate = "/GetPeople",
BodyStyle = WebMessageBodyStyle.WrappedRequest,
ResponseFormat = WebMessageFormat.Json,
RequestFormat = WebMessageFormat.Json)]
[OperationContract]
string GetPeople();
}
The implementation of the interface:
public string GetPeople()
{
PeoplesEntities qe = new PeoplesEntities();
var result = from q in qe.tPeople
select q;
int count = result.Count();
int index = new Random().Next(count);
tPeople people = result.OrderBy(a=>a.ID).Skip(index).FirstOrDefault();
// result.First().ToString();
return people.FirstName + " - " + people.LastName;
}
and this is how i'm consuming it through an android service:
try {
HttpGet request = new HttpGet(SERVICE_URI + "/GetPeople");
request.setHeader("Accept", "application/json");
request.setHeader("Content-type", "application/json");
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpResponse response = httpClient.execute(request);
HttpEntity responseEntity = response.getEntity();
// Read response data into buffer
char[] buffer = new char[(int)responseEntity.getContentLength()];
InputStream stream = responseEntity.getContent();
InputStreamReader reader = new InputStreamReader(stream);
reader.read(buffer);
stream.close();
JSONArray plates = new JSONArray(new String(buffer));
return new String(buffer);
} catch (Exception e) {
e.printStackTrace();
return e.toString();
}
}
The exception I get is what is mentioned in the subject. What's strange is the value tha ti'm expecting is returned in the exception. I have no clue why it's expecting the square bracket.
FYI, most of the code i used is taken directly from online examples. Any help would be greatly appreciated. Thanks.

You're trying to create a JSONArray from a string that doesn't contain valid JSON array syntax. A JSONArray can be created from a string of the form [item1, item2, item3....] but you're just returning a single item in your string: FirstName LastName.
The line after it just returns the buffer, so the JSONArray call is pointless, anyway. You don't need the JSONArray call at all, since you're not dealing with JSON data. Just remove that line.

Json Parse not working properly but works on jsontest

I am a new programmer, i am trying to build an app with Json.
I created Json parser class and in my main activity i have the following code :
String url = "http://echo.jsontest.com/key/value/one/two";
JSONObject json = jParser.getJSONFromUrl(url);
one = json.getString(gridArray.get(lekeres).getTitle()); // one has the good value "two"
This works great. BUT
if i change url to : https://api.myjson.com/bins/3f8d2
which is exactly the same code as in the jsontest, one doesn't have "two" . I searched for hours but i don't know why this is happening. I did nothing but change the url. The contest is the same...

Since I don't know how is your parser. I made a quick test and can read both link normally with this code:
try {
//url = new URL(""http://echo.jsontest.com/key/value/one/two2");
url = new URL("https://api.myjson.com/bins/3f8d2");
InputStream is = url.openStream();
JSONObject json = null;
BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
StringBuilder sb = new StringBuilder();
int cp;
while ((cp = rd.read()) != -1) {
sb.append((char) cp);
}
String jsonText = sb.toString();
json = new JSONObject(jsonText);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
This is more examples: http://en.proft.me/2013/12/5/how-parse-json-java/.
You can make your getJSONFromUrl similarly. Otherwise like other suggest try without https://.

JSON response cutting off part way through

When downloading a JSON array, it cuts off 1/4 of the way through the string, its pretty huge - but it should get the entire string.
There are no errors thrown in the LogCat. This is the method I am using, I have been through it a few times and cant see a reason why it is cutting off. I am pretty new to this however.
public static JSONArray getJSONfromURL(String url){
//initialize
InputStream is = null;
String result = "";
JSONArray jArray = null;
//http post
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
} catch (Exception e) {
Log.e("log_tag", "Error in http connection "+e.toString());
}
//convert response to string
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();
result=sb.toString();
} catch (Exception e) {
Log.e("log_tag", "Error converting result "+e.toString());
}
//try parse the string to a JSON object
try {
Log.d("log_tag", "jresult: " + result + "finish");
jArray = new JSONArray(result);
//Log.e("log_tag", "result: " + jArray.toString());
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data "+e.toString());
}
return jArray;
}
I think once this is cracked I will be set. I will make this a class to use in future projects too so I dont have to keep rebuilding it!
EDIT: For loop where markers should be added to map:
try{
for(int i=0;i<arrayResultFromURL.length();i++){
JSONObject json_data = arrayResultFromURL.getJSONObject(i);
// assign attributes from the JSON string to local variables
String id =json_data.getString("id");
String title =json_data.getString("title");
String strap =json_data.getString("strap");
Double lat = (double) json_data.getDouble("lat");
Double lon = (double) json_data.getDouble("long");
theMap.addMarker(new MarkerOptions()
.position(new LatLng(lat, lon))
.title(title)
.snippet(strap));
}
}catch (Exception e){
Log.e("log_tag", "error in array: " + e.toString());
}

Maybe your problem comes from the way your are treating the response object. Check this thread.
If not try to check the size of the response first to see if you are receving all.
httpResponse.getEntity().getContentLength()
Also just in case you didn't know there is a nice library (i've been using it since i found it) that simplifies json parsing ckeck it out here.

These type of things can best be done by libraries such as GSON or Jackson
Also, if your goal is to create a JSONArray, there is a constructor that takes in a JSONTokener. JSONTokener can in turn be constructed from your InputStream.

Error converting a HTTP POST response to JSON

When I try to convert an HTTP POST response to JSONArray I get the error:
org.json.JSONException: Value of type java.lang.String cannot be converted to JSONArray
the error happens in the line: JSONArray jArray = new JSONArray(result);
the value of the string result is [{"return":"1"}] but it includes an extra blank character at the beginning that when removed, solves the problem. However, this character is not blank because a trim does not solve the problem. I believe there is some problem with the POST response, maybe badly constructed? (or maybe the POST request is wrong?) Any help is welcome.
A GET request works just fine, but I need to do a POST request.
This is the code:
HttpPost("usuarioLogin.php",nameValuePairs);
String result = ConvertResponseToString();
try{
JSONArray jArray = new JSONArray(result);
JSONObject json_data=null;
for(int i=0;i<jArray.length();i++){
json_data = jArray.getJSONObject(i);
ret = json_data.getInt("return");
retorno = (ret==1)?true:false;
}
}
catch(JSONException e1){
e1.printStackTrace();
} catch (ParseException e1) {
e1.printStackTrace();
}
this is the code of the function HttpPost()
private void HttpPost(String php, ArrayList<NameValuePair> nameValuePairs)
{
try{
HttpClient httpclient = new DefaultHttpClient();
String host = com.android.taggies.LoginUser.getContext().getResources().getString(R.string.host);
HttpPost httppost = new HttpPost("http://"+host+php);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
}
this is the code of the function ConvertResponseToString()
private String ConvertResponseToString()
{
//convert response to string
String result = null;
try{
//BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}
catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
return result;
}
this is the code of my php that replies to the POST
<?php
mysql_connect("localhost","root","");
mysql_select_db("dbTaggies");
$q=mysql_query("SELECT count(*) as 'return' FROM users
WHERE name='$_POST[user]' AND password ='$_POST[pass]'");
while($e=mysql_fetch_assoc($q))
{
$output[]=$e;
}
print(json_encode($output));
mysql_close();
?>

I'm using this and for me always works fine:
DefaultHttpClient client = new DefaultHttpClient();
JSONObject json = null;
String resoult = "";
try
{
HttpPost postRequest = new HttpPost("XXXXXXXXXXXXXXXXXX");
HttpResponse postResponse = client.execute(postRequest);
HttpEntity postResponseEntity = postResponse.getEntity();
if (postResponseEntity != null)
resoult= EntityUtils.toString(postResponseEntity);
json = new JSONObject(resoult);
}
catch(Exception e)
{
}

The problem is solved.
PHP files were saved in UTF-8 WITH BOM, the solution was saving the files in UTF8 no BOM and the initial character in the POST response was removed.