Json in Android : Unexpected character (<) at position 0 - php

Question

I am trying to use Json for an android online db connection. Problem is no matter what i try i get the ever so popular Unexpected character (<) at position 0 error.
here is my method:
public void getData(){
String result = "";
InputStream isr = null;
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http:link to my file.php");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
isr = entity.getContent();
}
catch(Exception e){
Log.e("log_tag", "Error in http connection " + e.toString());
resulString="Couldn't connect to database";
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(newInputStreamReader(isr,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
isr.close();
result=sb.toString();
}
catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
//parse json data
try {
String s = "";
JSONParser parser_obj = new JSONParser();
JSONArray jArray = (JSONArray) parser_obj.parse(result.toString());
for(int i=0; i<jArray.length();i++){
JSONObject json = jArray.getJSONObject(i);
s = s +
"Id : "+json.getInt("Id")+" Name: "+json.getString("ShopName")+"\n"+
"Icon : "+json.getInt("ShopIcon")+"Description:"+json.getString("ShopDesc")+"\n\n";
}
resulString=s;
} catch (Exception e) {
// TODO: handle exception
Log.e("log_tag", "Error Parsing Data "+e.toString());
}
}
tried both get and post methods
heres my php file:
!php1
the connection is established but theres no result and loggcat displays that error.
Can you help me please?

Answer 1

After 2 days I finally found the solution:
simply added these 2 headers:
request.setHeader("Accept", "application/json"); // or application/jsonrequest
request.setHeader("Content-Type", "application/json");
also make sure that the url in your HTTP is perfect.
And this was of awesome help for testing the connection:
http://www.requestmaker.com