May 2017
Beginner to intermediate
470 pages
10h 49m
English
Content preview from Android System Programming
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Loading a native library
Once Native Bridge is ready to use, we can have a look at what happens when an application loads a native library in a different processor architecture.
We know that, if we implement a native method in a shared library, we need to implement a JNI_OnLoad entry point, which is used to register native methods. The Java code needs to make a call to either System.load or System.loadLibrary to load this shared library. In the following table, it is the call stack from System.loadLibrary to JNI_OnLoad:
|
Function |
Class |
Language |
|
System.loadLibrary |
Runtime |
Java |
|
doLoad |
Runtime |
Java |
|
nativeLoad |
Runtime |
JNI |
|
Runtime_nativeLoad |
Runtime |
C++ |
|
LoadNativeLibrary |
JavaVMExt |
C++ |
|
JNI_OnLoad ... |
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