An application class that listens for messages broadcast by calling Context.broadcastIntent
An XML file that describes the layout of an Activity screen.
An XML file associated with each Application that describes the various activies, intent filters, services, and other items that it exposes.
A user-supplied XML, bitmap, or other file, entered into an application build process, which can later be loaded from code. Android can accept resources of many types; see Resources for a full description. Application-defined resources should be stored in the res/ subfolders.
A class that runs in the background to perform various persistent actions, such as playing music or monitoring network activity.