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Note: When a Java native method is called before the implementation is loaded it leads to a crash!
1. Java: Create a nativ method
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| Code Block | ||
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public static native void SetBackgroundColor( int color ); |
2. C++: Create a matching implementation
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| Code Block |
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JNIEXPORT void JNICALL Java_com_graebert_aressimplified_JNI_SetBackgroundColor( JNIEnv * env, jclass clazz, jint color ){...} |
3. Store the C++ implementation inside a shared library
See CFx/AndroidSimplified_JNI/app/CMakeLists.txt
See CFx/CMakeLists.txt
4. Compile the shared library with CMake
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| Code Block |
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...externalNativeBuild {
cmake {
arguments "-DANDROID_STL=c++_shared", "-DVIEWER=1"
cppFlags "-std=c++11 -frtti -fexceptions"
}
}
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externalNativeBuild {
cmake {
path file('../../CMakeLists.txt')
}
}
... |
5. Load the shared library with System.LoadLibrary()
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