Convert JNI types to Native types

Question

While there is documentation regarding turning a jstring to a native string (string nativeString = env->GetStringUTFChars(jStringVariable, NULL);

Answer 1

Same issue–fixed. In my case I'm using openFrameworks so I don't know if this applies to non-openFrameworks projects (haven't tested). However, it appears that the first two arguments in an external function are always "env" and "thiz" and these need to be defined explicitly for each new extern function.

extern "C"{

// casts the variable properly
void Java_com_package_JavaClass_someFunction( JNIEnv*  env, jobject  thiz, jboolean yourBool ){
    myTestApp->someFunction( (bool) yourBool );
}

// "yourBool" will always be "1" because its taking the spot of "thiz" which is not null
void Java_com_package_JavaClass_someFunction( JNIEnv*  env, jboolean yourBool ){
    myTestApp->someFunction( (bool) yourBool );
}

// "yourBool" will always be "1" because its taking the spot of "env" which is not null
void Java_com_package_JavaClass_someFunction( jboolean yourBool ){
    myTestApp->someFunction( (bool) yourBool );
}


}