Get a JSON object from a HTTP response

Question

I want to get a JSON object from a Http get response   Here is my current code for the Http get   protected String doInBackground String    params         HttpClient client   new DefaultHttpClient        HttpGet request   new HttpGet params 0        HttpResponse response      String result   null      try           response   client execute request                    HttpEntity entity   response getEntity             if  entity    null                    A Simple JSON Response Read             InputStream instream   entity getContent                result   convertStreamToString instream                  now you have the string representation of the HTML request             System out println  RESPONSE      result               instream close                if  response getStatusLine   getStatusCode      200                    netState setLogginDone true                                       Headers         org apache http Header   headers   response getAllHeaders            for  int i   0  i  lt  headers length  i                  System out println headers i                    catch  ClientProtocolException e1               TODO Auto-generated catch block         e1 printStackTrace          catch  IOException e1               TODO Auto-generated catch block         e1 printStackTrace              return result      Here is the convertSteamToString function   private static String convertStreamToString InputStream is         BufferedReader reader   new BufferedReader new InputStreamReader is        StringBuilder sb   new StringBuilder         String line   null      try           while   line   reader readLine       null                sb append line     n                    catch  IOException e            e printStackTrace          finally           try               is close              catch  IOException e                e printStackTrace                        return sb toString        Right now I am just getting a string object  How can I get a JSON object back

User · Accepted Answer

The string that you get is just the JSON Object.toString(). It means that you get the JSON object, but in a String format.

If you are supposed to get a JSON Object you can just put:

JSONObject myObject = new JSONObject(result);

User · Answer

For the sake of a complete solution to this problem  yes  I know that this post died long ago        If you want a JSONObject  then first get a String from the result   String jsonString   EntityUtils toString response getEntity       Then you can get your JSONObject   JSONObject jsonObject   new JSONObject jsonString

User · Answer

Do this to get the JSON   String json   EntityUtils toString response getEntity       More details here   get json from HttpResponse

User · Answer

This is not the exact answer for your question  but this may help you   public class JsonParser        private static DefaultHttpClient httpClient   ConnectionManager getClient         public static List lt Club gt  getNearestClubs double lat  double lon               YOUR URL GOES HERE         String getUrl   Constants BASE URL   String format  getClosestClubs lat  f amp lon  f   lat  lon            List lt Club gt  ret   new ArrayList lt Club gt              HttpResponse response   null          HttpGet getMethod   new HttpGet getUrl           try               response   httpClient execute getMethod                   CONVERT RESPONSE TO STRING             String result   EntityUtils toString response getEntity                     CONVERT RESPONSE STRING TO JSON ARRAY             JSONArray ja   new JSONArray result                   ITERATE THROUGH AND RETRIEVE CLUB FIELDS             int n   ja length                for  int i   0  i  lt  n  i                         GET INDIVIDUAL JSON OBJECT FROM JSON ARRAY                 JSONObject jo   ja getJSONObject i                       RETRIEVE EACH JSON OBJECT S FIELDS                 long id   jo getLong  id                    String name   jo getString  name                    String address   jo getString  address                    String country   jo getString  country                    String zip   jo getString  zip                    double clat   jo getDouble  lat                    double clon   jo getDouble  lon                    String url   jo getString  url                    String number   jo getString  number                        CONVERT DATA FIELDS TO CLUB OBJECT                 Club c   new Club id  name  address  country  zip  clat  clon  url  number                   ret add c                           catch  Exception e                e printStackTrace                          RETURN LIST OF CLUBS         return ret           Again  it   s relatively straight forward  but the methods I   ll make special note of are   JSONArray ja   new JSONArray result   JSONObject jo   ja getJSONObject i   long id   jo getLong  id    String name   jo getString  name    double clat   jo getDouble  lat

User · Answer

You need to use JSONObject like below   String mJsonString   downloadFileFromInternet urls 0     JSONObject jObject   null  try       jObject   new JSONObject mJsonString      catch  JSONException e        e printStackTrace        return false           private String downloadFileFromInternet String url        if url    null      url isEmpty      true            new IllegalArgumentException  url is empty null        StringBuilder sb   new StringBuilder        InputStream inStream   null      try               url   urlEncode url           URL link   new URL url           inStream   link openStream            int i          int total   0          byte   buffer   new byte 8   1024           while  i inStream read buffer      -1                        if total  gt    1024   1024                                 return                               total    i              sb append new String buffer 0 i                        catch Exception e                 e printStackTrace            return null       catch OutOfMemoryError e                e printStackTrace            return null            return sb toString       private String urlEncode String url        if url    null      url isEmpty      true            return null      url   url replace              url   url replace              url   url replaceAll       20        return url      Hope this helps you

User · Answer

There is a JSONObject constructor to turn a String into a JSONObject   http   developer android com reference org json JSONObject html JSONObject java lang String

User · Answer

Without a look at your exact JSON output  it s hard to give you some working code  This tutorial is very useful  but you could use something along the lines of     JSONObject jsonObj   new JSONObject  yourJsonString      Then you can retrieve from this json object using   String value   jsonObj getString  yourKey

[java] Get a JSON object from a HTTP response

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