April 2015
Beginner to intermediate
494 pages
10h 26m
English
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Chapter 4. Calling Java Back from Native Code
To reach its full potential, JNI allows calling back Java code from C/C++. "Back" because native code is first invoked from Java, which in turn calls it back. Such calls are performed through a reflective API, which allows doing almost anything that can be done directly in Java.
Another important matter to consider with JNI is threading. Native code can be run on a Java thread, managed by the Dalvik VM, and also from a native thread created with standard POSIX primitives. Obviously, a native thread cannot call JNI code unless it is turned into a managed Java thread! Programming with JNI necessitates knowledge of all these subtleties. This chapter will guide you through the main ones.
The last topic, ...
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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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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.