In this chapter, we explored the incredibly useful
IntentService—an ideal construct for performing long-running background tasks off the main thread, surviving well beyond the lifecycle of the initiating Activity, and even continuing to do useful work when the application is no longer in the foreground.
We learned how to send work to an
IntentService with parameterized Intents, how to process that work in the background by implementing
onHandleIntent, and how to send results back to the originating Activity using a
For cases where the application is no longer in the foreground or an operation is particularly long-running, we saw how to post notifications to the notification drawer, complete with progress updates.
In the next ...