January 2019
Intermediate to advanced
384 pages
11h 50m
English
Content preview from Hands-On High Performance Programming with Qt 5
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Power usage
On a mobile device, there are basically the same power-saving mechanisms as on an embedded one, such as avoiding waking up peripheral devices and sensors (such as GPS), minimizing of network transfers and disk I/O, and reducing activity when an application is not visible.
One difference from embedded devices is that the Android OS adds its own power management extension, built on top of Linux power management, which will try to put the system, and thus the CPU, into sleep mode as soon as possible. An application can request and also call WakeLock from PowerManager to prevent the system from going into sleep mode. We can do this from Qt through the QAndroidJniObject class, but normally it's not recommended, as it will increase ...
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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.