July 2015
Beginner to intermediate
600 pages
18h 59m
English
book
Android Programming: The Big Nerd Ranch Guide, 2nd Edition
by Bill Phillips, Chris Stewart, Brian Hardy, Kristin Marsicano
Content preview from Android Programming: The Big Nerd Ranch Guide, 2nd Edition
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Cleaning Up AsyncTasks
In this chapter, your AsyncTask and other code was carefully structured so that you would not have to keep track of the AsyncTask instance.
For example, you retained the fragment (called setRetainInstance(true)) so that rotation does not repeatedly fire off new AsyncTasks to fetch the JSON data.
However, in other situations you will need to keep a handle on your AsyncTasks, even canceling and rerunning them at times.
For these more complicated uses, you will want to assign your AsyncTask to an instance variable. Once you have a handle on it, you can call AsyncTask.cancel(boolean). This method allows you to cancel an ongoing AsyncTask.
AsyncTask.cancel(boolean) can work in a more rude or less rude fashion. ...
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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.
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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.