Background Services

Android supports applications and services designed to run invisibly in the background.
Modern mobiles are by nature multifunction devices; however, their limited screen sizes means that
generally only one interactive application can be visible at any time. Platforms that don’t support
background execution limit the viability of applications that don’t need your constant attention.
Background services make it possible to create invisible application components that perform automatic
processing without direct user action. Background execution allows your applications to become eventdriven
and to support regular updates, which is perfect for monitoring game scores or market prices,
generating location-based alerts, or prioritizing and prescreening incoming calls and SMS messages.