How to send callback from Java code to unreal C++ using JNI?

[kikokko]

I am creating an app using Android native api.

I managed to call Java code from C++ using JNI but not sure about how I can send a callback from the Java code to C++.

It would be appreciated if anyone could share me the sample code or articles about it.

[lukassoo]

I happened to be searching for this too, and from what I can tell there seems to be a good answear here:

Bidirectional link between java application and an unreal game

In case someone else needs this here is how it’s done. This link between c++ and java made possible with jni. The easiest way to access java is to modify game activity class with upl using a tag . For example: <gameActivityClassAdditions> <insert> public void testFunction() { Log.debug("caled java code"); } </insert> </gameActivityClassAdditions> Then in c++ function you call: static jmethodID javaMethodId; SomeClass::SomeClass() { JNIEnv* env = FAndroi…

I haven’t used this yet so if it’s outdated and no longer works we might have to look for something else.