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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Recycling Views
Figure 10.10 shows 13 (and a half) rows of Views. You can swipe to scroll through 100 Views to see all of your Crimes. Does that mean that you have 100 View objects in memory? Thanks to your RecyclerView, no.
Creating a View for every item in the list all at once could easily become unworkable. As you might imagine, a list can have far more than 100 items, and your list items can be much more involved than your simple implementation here. Also, a Crime only needs a View when it is onscreen, so there is no need to have 100 Views ready and waiting. It would make far more sense to create view objects only as you need them.
RecyclerView does just that. Instead of creating 100 Views, it creates just enough to fill the ...
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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.
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