Error Parsing Json from Mysql - php

Question

HI I have this code to retrieve a mysql database but there is an error when it comes to parsing the info. I think its because the information is in one string,
#Override
protected Void doInBackground(String... params) {
String result = "";
InputStream is = 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();
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();
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 = i +1;
//String title = json_data.getString("Title");
double latitude = json_data.getDouble("Lat");
double longitude = json_data.getDouble("Lon");
//Adds proximity to POI's
ProxAlert inst = new ProxAlert();
inst.addProximityAlert(latitude,longitude, id);
//
inst.saveCoordinatesInPreferences((float)latitude, (float)longitude);
//prints to 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 the logCat reads
09-04 19:13:13.997: E/log_tag(28100): Error parsing data org.json.JSONException: Value at 0 of type java.lang.String cannot be converted to JSONObject

Answer 1

In your code, you doing http request (http://cs1.ucc.ie/~am32/getDB.php) and getting content like 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 is not a valid Json.
For check Json Validation use JsonLint .
[EDIT]
Please read some Json Document first for better understanding.
Here android-json-parsing-tutorial is a good tutorial which explains Json parsing with example.