I would like know how to implement the Login Check example by comparing the username and password on Server-side using Web-Services in Android.
A Complete Example for Authentication is Here
Use HttpPostmethod to check login. This will make the login secured.
you can also check out Parse.io , the service will handle most of the server-side for you, depending on what you actually want to do.
来源：https://stackoverflow.com/questions/9256647/login-check-in-server-side