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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Starting an Activity
The simplest way one activity can start another is with the startActivity method:
public void startActivity(Intent intent)
You might guess that startActivity(…) is a static method that you call on the Activity subclass that you want to start. But it is not. When an activity calls startActivity(…), this call is sent to the OS.
In particular, it is sent to a part of the OS called the ActivityManager. The ActivityManager then creates the Activity instance and calls its onCreate(…) method, as shown in Figure 5.7.
Figure 5.7 Starting an activity
How does the ActivityManager know which Activity to ...
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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.