January 2017
Beginner to intermediate
624 pages
22h 42m
English
book
Android Programming: The Big Nerd Ranch Guide, Third Edition
by Bill Phillips, Chris Stewart, Kristin Marsicano
Content preview from Android Programming: The Big Nerd Ranch Guide, Third Edition
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For the More Curious: The Application Context
Earlier in this chapter, you used the application context in the constructor of the CrimeLab.
private CrimeLab(Context context) {
mContext = context.getApplicationContext();
...
}
What makes the application context special? When should you use the application context over an activity as a context?
It is important to think about the lifetime of each of these objects. If any of your activities exist, Android will have also created an application object. Activities come and go as the user navigates through your application, but the application object will still exist. It has a much longer lifetime than any one activity.
The CrimeLab is a singleton, which means that once it is created, ...
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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.