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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From Layout XML to View Objects
How do XML elements in activity_main.xml become View objects? The answer starts in the MainActivity class.
When you created the GeoQuiz project, a subclass of Activity named MainActivity was created for you. The class file for MainActivity is in the app/java directory of your project.
A quick aside about the directory name before we get into how layouts become views: This directory is called java because Android originally supported only Java code. In your project, because you configured it to use Kotlin (and Kotlin is fully interoperable with Java), the java directory is where the Kotlin code lives. You could create a kotlin directory and place your Kotlin files there, but that would provide no ...
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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.