How to get a count value from server into json in android? - php

Question

I am trying to retrieve the number of rows in my server table using json parsing and php in android.
I have done the following coding in php and I am getting the value also, but I don 't know how to proceed with the json. Please guide me step by step what to do or where I am going wrong. My codes and error logs are as follows:
php code:
<?php
mysql_connect("localhost","user","pswd");
mysql_select_db("demo");
$username= (isset($_POST['receivenumber'])) ? $_POST['receivenumber'] : '';
$q=mysql_query("SELECT COUNT(receivenumber) FROM `addtasknew` where `receivenumber` = '$username'") or die(mysql_error());
$row=mysql_fetch_assoc($q);
print (json_encode($row));
mysql_close();
?>
json codes in android
String result = null;
InputStream is = null;
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.mydomainname.org/task/getmytaskcount.php");
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
// String h="123";
//nameValuePairs.add(new BasicNameValuePair("to",h.toString()));
nameValuePairs.add(new BasicNameValuePair("receivenumber","9595959595"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
Log.e("log_tag", "connection success "+nameValuePairs);
}
catch(Exception e)
{
Log.e("log_tag", "Error in http connection "+e.toString());
Toast.makeText(getActivity(), "Connection fail", Toast.LENGTH_SHORT).show();
}
try
{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,HTTP.UTF_8),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
is.close();
result=sb.toString();
Log.e("log_tag", "result "+result.toString());
}
catch(Exception e)
{
Log.e("log_tag", "Error converting result "+e.toString());
Toast.makeText(getActivity(), " Input reading fail", Toast.LENGTH_SHORT).show();
}
try
{
// I don't know wht to do here to get the count value
JSONArray jArray = new JSONArray(result);
Log.w("Lengh",""+jArray);
}
catch(JSONException e)
{
Log.e("log_tag", "Error parsing data "+e.toString());
Toast.makeText(getActivity(), "JsonArray fail", Toast.LENGTH_SHORT).show();
}
error logs:
E/log_tag(2386): result ?{"COUNT(receivenumber)":"2"}
E/log_tag(2386): Error parsing data org.json.JSONException: Value {"COUNT(receivenumber)":"2"} of type org.json.JSONObject cannot be converted to JSONArray

Answer 1

You are trying to interpret your JSON as a JSONArray but it's a JSONObject.
To retrieve your value try this:
JSONObject jObj = new JSONObject(result);
String count= jObj.getString("COUNT(receivenumber)");
You can check this tutorial to learn more about JSON in android.

Answer 2

Try this
try {
JSONObject jObj = new JSONObject(result);
Log.i("COUNT",jObj.getString("COUNT") + " COUNT");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
and change the sql query like
"SELECT COUNT(receivenumber) as COUNT FROM addtasknew where receivenumber = '$username'";