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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