getting empty response from PHP server

Question

Hi friends I am trying to add PHP web services to my ANDROID application, my android code:

userName = userNameField.getText().toString();
passWord = passWordField.getText().toString();

try {
JSONObject json = new JSONObject();
json.put("username", userName);
json.put("password", passWord);
json.put("device_type", "Android");
json.put("lat", "0.0");
json.put("long", "0.0");

JSONObject json1 = new JSONObject();
json1.put("method_name", "checkLogin");
json1.putOpt("body", json);

HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams,
        TIMEOUT_MILLISEC);
HttpConnectionParams.setSoTimeout(httpParams, TIMEOUT_MILLISEC);
HttpClient client = new DefaultHttpClient(httpParams);

HttpPost request = new HttpPost(URL);
request.setEntity(new StringEntity(json1.toString()));
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String response = client.execute(request, responseHandler);

Toast.makeText(this, response, Toast.LENGTH_LONG).show();

} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Throwable t) {
Toast.makeText(this, "Request failed: " + t.toString(),
        Toast.LENGTH_LONG).show();
}
}

Request:

 {"method_name":"checkLogin","body":   {"username":"[email protected]","password":"password","device_type":"android","lat":"","long":""}}

expected Response:

[{"status":"1","message":"Login successfully","data":{"id":"xx","username":"[email protected]","first_name":"xxx","last_name":"yyy","gender":"xxx","relationship":"xxxx","birthdate":"xxxx","hometown":"","major":null,"class":null,"house":null,"device_type":"iphone","current_location_lat":"0.0","current_location_lon":"0.0","profile_image":"no_male_user.png","is_login":"1","created":"2012","status":"1","tag":[{"id":"x","tag_name":"xxxx"},{"id":"x","tag_name":"xxx xxx"}]}}]

main.php

<?php
require_once('configure.php');
require_once('db.php');
require_once("request.php");
require_once("error_msg.php");
require_once("./includes/JSON.php");

$json = $_POST['json'];

$objRequest = new Request($json);
$rows = $objRequest -> main();
echo $rows;
?>

request.php

<?php
require_once("./includes/JSON.php");
require_once("db.php");
require_once('SimpleImage.php');
class Request
{
function __construct($json)
{
    $this -> array1 = @json_decode(stripcslashes(trim($json)));
}
function main()
{
    $objDb = new DB();
    $conn = $objDb -> getConnection();

    if(!$conn)
        return Error :: $DB_CONN_ERROR." ".$DB_CONN_ERROR_DESC;
    else
    {
        if($this -> array1 -> method_name == 'checkLogin')
            return $this -> getLoginFlag($this -> array1 -> body);
    }
}
// For Login Start
function getLoginFlag($body)
{
    $username = trim($body -> username);
    $password = ($body -> password);
    $device_type = trim($body -> device_type);

    $this -> rs_login = DB :: selectLoginRecord($body);
    $arr_resp = array();
    $retArray = array();
    $tagListArray = array();
    if(mysql_num_rows($this -> rs_login) > 0)
    {
        while($rows = mysql_fetch_array($this -> rs_login))
        {
                $arr_resp = array("id"=> $rows['id'],"username"=> $rows['username'],"first_name"=> ucfirst($rows['first_name']),"last_name"=>ucfirst($rows['last_name']),"gender"=>$rows['gender'],"relationship"=>$rows['relationship'],"birthdate"=>date('M d, Y', strtotime($rows['birthdate'])),"hometown"=>$rows['hometown'],"major"=>$rows['major'],"class"=>$rows['class'],"house"=>$rows['house'],"device_type"=>$rows['device_type'],"current_location_lat"=>$rows['current_location_lat'],"current_location_lon"=>$rows['current_location_lon'],"profile_image"=>$rows['profile_image'],"is_login"=>$rows['is_login'],"created"=>date('Y', strtotime($rows['created'])),"status"=>$rows['status']);   
        }
        $this -> rs_tag_list = DB :: selectTagList($arr_resp['id']);
        if(mysql_num_rows($this -> rs_tag_list) > 0)
        {   
            while($rows = mysql_fetch_array($this -> rs_tag_list))
            {
                $tagListArray['tag'][]= array("id"=> $rows['id'],"tag_name"=> $rows['tag_name']);   
            }
        }

        $finalArray = array_merge($arr_resp,$tagListArray);
        $retArray[] = array("status"  => "1","message" => "Login successfully","data" => $finalArray);
    }
    else
    {
        $retArray[] = array("status" => "0","message" => "The username or password you entered is incorrect");  
    }

    return json_encode($retArray);
}
// End Login

}

?>

but am getting empty response, can anybody please help me. Here I am using JSON for data parsing. thanks for your response friends.

Thanks for your response, I have created a constant String for URL — Babloo
– Babloo, Commented Apr 23, 2012 at 11:36
possible duplicate of sending HTTP request to PHP web server by using JSON, in ANDROID — Paresh Mayani
– Paresh Mayani, Commented Apr 23, 2012 at 11:37

Tuhin Subhra Dey · Accepted Answer · 2012-04-23 12:12:48Z

1

Can you check the php code if it gets the required value correctly and executing the the desired method exactly ?

answered Apr 23, 2012 at 12:12

Tuhin Subhra Dey

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3 Comments

Tuhin Subhra Dey Over a year ago

Ok let do one by one. First print those requested variables in php page in the server. Then check print those inside the login method. Else just comment everything and print "test"; Just debug step by step. See whether you get any response. Else you have problem with your java code. See if you have desired permission in manifest ?

Babloo Over a year ago

HI Tuhin, thanks for your response. I have added the PHP code to this question, this code is working fine in iPhone. Can you please help me

Tuhin Subhra Dey Over a year ago

Just do one thing. write `echo "hi"; die; before the line $json = $_POST['json']; and look if you get any response.

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