java.lang.UnsatisfiedLinkError: Native method not found

Question

I\'m trying to make a NDK application, but I get this error:

java.lang.UnsatisfiedLinkError: Native method not found: com.example.hellondk.jni.HelloNDK.hello         


        

Answer 1

You're exporting it as a C++ function, but the JNI linker doesn't understand C++ name mangling, so it won't be able to find it.

You can use extern "C" to have the function exported without C++ name mangling:

extern "C" JNIEXPORT jint JNICALL Java_com_example_hellondk_jni_HelloNDK_hello(JNIEnv* env, jobject o)
{
    return (jint) 2;
}