Hi i want to create native app in android with php backend. if user login into site ,i can get the request parameter username ,password and validate through php and session will be created ,i can able to give response parameter as for user logged in success. if they want to navigate to another page ,i have validate is session is created or not. for that how to maintain session , is it need to send the sessionid to every request or is it possible to handle default in nativeapp side. can any one tell me the details about this ?