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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Handling Touch Events
One way to listen for touch events is to set a touch event listener using the following View function:
fun setOnTouchListener(l: View.OnTouchListener)
This function works the same way as setOnClickListener(View.OnClickListener). You provide an implementation of View.OnTouchListener, and your listener will be called every time a touch event happens.
However, because you are subclassing View, you can take a shortcut and override this View function instead:
override fun onTouchEvent(event: MotionEvent): Boolean
This function receives an instance of MotionEvent, a class that describes the touch event, including its location and its action. The action describes the stage of the event:
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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.