Web activities define a way for applications to delegate an activity to another (usually user-chosen) application. Web activities have some overlap with Web Intents.
An activity is something a user wants to do like pick an image, send an e-mail, etc. App authors will want to define an app that can handle an activity or that delegate to an activity
Registering an app as an activity handler
- Register an activity
- handle an activity
Using an activity
List of available activities (separate between built-in and other)