Android

Learn about Android and its model

what an app does 1

provides services to the user via a user interface

what an app does 2

provides services to other apps to allow sharing

note

there is no prior knowledge of which apps are available to share information - you cannot know this as a developer

impact 1

discovery - what offers what

impact 2

wiring - choosing the servicing component

impact 3

interface definition - broad application

component kind 1

activities - user interactions

component kind 2

services - background non-GUI processes

component kind 3

content providers - shared data

component kind 4

broadcast receivers - listen to events

activity

corresponds to a screen, application moves between activities and potentially passes data between them

information needed to select activities

what’s being done (task), who can do it (discovery) and who we will use to do it (binding)

communication between components 1

the calling component uses an intent to announce the wish for communication with another component

communication between components 2

the called component has an intent filter to receive the intent where the intent must match the conditions of the intent filter