May 2022
Intermediate to advanced
688 pages
20h 12m
English
book
Android Programming: The Big Nerd Ranch Guide, 5th Edition
by Bryan Sills, Brian Gardner, Kristin Marsicano, Chris Stewart
Content preview from Android Programming: The Big Nerd Ranch Guide, 5th Edition
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Starting an Activity
The simplest way one activity can start another is with the startActivity(Intent) function.
If you are coming from other programming languages and platforms, your first instinct might be to call the constructor on the activity you want to start. Unfortunately, that will not work. Instead you have to call startActivity(Intent), and the OS will manage creating your activity for you.
In particular, your call is sent to a part of the OS called the ActivityManager. The ActivityManager then creates the Activity instance and calls its onCreate(Bundle?) function, as shown in Figure 7.6.
Figure 7.6 Starting an activity
How does the ActivityManager know which Activity to start? That information is in ...
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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.