Multiple activities

Core elements

• Activity : a rectangular area that displays something
• Intent : an action being requested that the device should try to perform
• IntentService : services that can handle Intent requests and process the work to be done
• BroadcastReceivers : receives an Intent from a sendBroadcast method, often indicating that some work has been completed.

Functions / Objects

• Intent : an action being requested that the device should try to perform
• getIntent() : gets the Intent that was passed to an activity
• putExtra() : passes data as a (key - value) pair
• getExtras().getString() : retrieves the String that was passed to the Intent object
• startActivity() : used to launch another activity