php - Error Parsing Json from Mysql -

hi have code retrieve mysql database there error when comes parsing info. think because information in 1 string, @override protected void doinbackground(string... params) {

    string result = "";     inputstream = null;      //http post     try{             httpclient httpclient = new defaulthttpclient();             httppost httppost = new httppost("http://cs1.ucc.ie/~am32/getdb.php");             //httppost.setentity(new urlencodedfromentity(namevaluepairs));             httpresponse response = httpclient.execute(httppost);             httpentity entity = response.getentity();             = entity.getcontent();     }     catch(exception e){             log.e("log_tag", "error in http connection "+e.tostring());      }     //convert response string     try{             bufferedreader reader = new bufferedreader(new inputstreamreader(is, "iso-8859-1"),8);             stringbuilder sb = new stringbuilder();             sb.append(reader.readline() + "\n");              string line = null;             while ((line = reader.readline()) != null) {                     sb.append(line);             }             is.close();             result=sb.tostring();               log.i("json string", result);     }     catch(exception e){             log.e("log_tag", "error converting result "+e.tostring());     }      //parse json data     try{             list<string> mylist= new arraylist<string>(arrays.aslist(result.split(" ")));             jsonarray jarray = new jsonarray(mylist);              system.out.println("length"+ jarray.length());             log.d("db","length"+jarray.length());              for(int i=0; i<jarray.length(); i++){                      jsonobject json_data = null;                      json_data = jarray.getjsonobject(i);                     int id = +1;                     //string title = json_data.getstring("title");                      double latitude = json_data.getdouble("lat");                      double longitude = json_data.getdouble("lon");                       //adds proximity poi's                     proxalert inst = new proxalert();                     inst.addproximityalert(latitude,longitude, id);                     //                     inst.savecoordinatesinpreferences((float)latitude, (float)longitude);                      //prints logcat                     system.out.println(id+"&"+latitude+"&"+longitude);               }     }     catch(jsonexception e){             log.e("log_tag", "error parsing data "+e.tostring());             log.e("log_tag","failed data as:\n"+result);     }         return null; } 

and logcat reads

09-04 19:13:13.997: e/log_tag(28100): error parsing data org.json.jsonexception: value  @ 0 of type java.lang.string cannot converted jsonobject 

in code, doing http request (http://cs1.ucc.ie/~am32/getdb.php) , getting content this

51.899429 -8472801 51.898525 -8.472176 51.899522 -8.47293 51.899495 -8.472844 51.899456 -8.472823 51.899628 -8.473016 51.899442 -8.47278 51.89931 -8.472587 51.808514 -8.472248 51.899174 -8.472649 51.899469 -8.472823 51.8932045 -8.500971 51.893623 -8.501472 

this not valid json.

for check json validation use jsonlint .

[edit] please read json document first better understanding. here android-json-parsing-tutorial tutorial explains json parsing example.