如何设置 Unreal Engine / Visual Studio 以便能够使用 JNI 为 Android 进行编码？

Question

In my project in Unreal Engine 4.25 want to use some native Android functionalities on the Oculus Quest by programming in C++ with JNI. However, I have problems with Visual Studio 2019 recognizing JNI specific code. I am able to launch an app to the Oculus Quest without adding JNI code, but when I want use #include “Android/AndroidJNI.h” Visual Studio complains it cannot find the source file.

I have tried installing the Android Game Development Extension for Visual Studio and followed their tutorial on how to add Android as a target platform in the hopes this would fix the problem. However, this did not change anything. Code that I put within an #if PLATFORM_ANDROID block is greyed out, implying that Visual Studio does not correctly recognize I am targeting Android.

Does anybody know how to properly set up Unreal Engine and Visual Studio, so it can work with JNI?

Answer 1

The header file is located at UE Engine code.

Ex) Program Files (x86)/Epic Games/UE_4.27/Engine/Source/Runtime/Launch/Public/Android/AndroidJNI.h

And you can include AndroidJNI.h adding "Launch" module in XXX.Build.cs

Ex) PrivateDependencyModuleNames.AddRange(new String[] { "...", "Launch", });