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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Challenge: No Untitled Crimes
It is impossible to solve a crime if you do not know what crime occurred. But if you open the detail view for a crime, erase its title, and navigate back to the list view, you will save a crime with no name.
For this challenge, while in CrimeDetailFragment, prevent the user from navigating back to the list if the selected crime’s title is blank. Using an OnBackPressedCallback, you can override the default Back button behavior. If the title is blank, give the user a hint that they should provide a description of the crime.
Some developer documentation that will be helpful for this challenge is at developer.android.com/guide/navigation/navigation-custom-back.
When using an OnBackPressedCallback, 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.