Overview android components
App components are the essential building blocks of an Android app. Each component is an entry point through which the system or a user can enter your app.
Each type serves a distinct purpose and has a distinct lifecycle that defines how the component is created and destroyed.
Most components must be specified in the AndroidManifest.xmlfile.
| component class | description |
|---|---|
| Activity | Component of application. It represents a single screen with a user interface. |
| Service | Component of application, that is used to perform task in background like playing music. |
| BroadcastReciever | Component of application, that allows to recieve events from other components of appliction, system and components of other applications. |
| ContentProvider | Component of application, that allows to share app data with other applications. Data can be stored in the file system, in a SQLite database, on the web, or on any other persistent storage location that your app can access. |