October 2019
Intermediate to advanced
624 pages
20h 7m
English
book
Android Programming: The Big Nerd Ranch Guide, 4th Edition
by Bill Phillips, Chris Stewart, Kristin Marsicano, Brian Gardner
Content preview from Android Programming: The Big Nerd Ranch Guide, 4th Edition
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Challenge: Improving ThumbnailDownloader’s Lifecycle Awareness
LiveData is a lifecycle-aware component that removes itself as an observer automatically based on events from its lifecycle owner.
Update ThumbnailDownloader so that it will remove itself as an observer automatically when the lifecycle it observes emits an ON_DESTROY event.
To do this, ThumbnailDownloader will need a reference to each of the lifecycles it observes.
The fact that ThumbnailDownloader observes both the fragment lifecycle and the fragment view lifecycle tightly couples ThumbnailDownloader to Fragment. There are many different ways to clean this up, but here we ask you to take one small step: Refactor ThumbnailDownloader so that it only observes the fragment ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.