I am planning for an android application that needs database. My plan is to use Google Cloud SQL for database, and build API's using Google App Engine (GAE). I looked into the UserService class provided in the appengine library, developed a simple applcation to authenticate, it redirects users to the google page for login and works fine. If I use this API in an android (or any OS) application, will the user have to sign-in every time the application is launched ? I haven't tried, but I want the user to sign-in only the first time, will GAE work that way ? Just wanted to clarify. Thanks
