What Makes an Android Application?

· Activity
– An Application’s presentation layer. Every screen in Android applications are extension of the Activity class.
– Activities use “Views” to form graphical user interfaces that display information and respond to user actions.
· Intent(Broadcast Rcv.)
– Intent is a message between Activity/Application with System
· Content Provider
– A shareable data store. Content Providers are used to manage and share application database
· Service
– Service is an application component that runs in the background