David Gassner begins by explaining how to work with events. He describes the activity lifecycle—what actually happens when a screen appears and disappears—and shares some techniques for working with events using Java objects, lambda expressions, and open source libraries. Next, he covers how to manage navigation, start activities with explicit intents, send data to an activity, and open other apps with implicit intents. David also shows how to send and receive broadcast messages that let you exchange data and notifications among the different tiers of your application. He demonstrates how to work with menus and the action bar, add a navigation drawer to a layout, and tackle advanced navigation techniques. Later courses in the Essentials series concentrate on other specific skills you can master.

 
Topics include:
* Working with events
* Handling events with Java objects and lambda expressions
* Managing navigation
* Sending data to an activity
* Opening other apps with implicit intents
* Sending and receiving broadcast messages
* Working with menus and the action bar
* Adding a navigation drawer
* Advanced navigation techniques
* Removing activities from the back stack