Unity 3D ARScene inside Native Android

hi. I have Unity 3d Augmented reality scene made with help of [login to view URL] is tracing the surface and place the object. Unity scene is working properly whenever I make the build and run in in device. Now I want to integrate this scene inside my native Android. Like whenever I press the button from native Android it will open this scene inside native Android. I have tryied a lot but whenever I combine both it shows me error of ARCore not found. Can anyone help me to resolve this issue.I will provide both Unity scene and Android project . as well both integrated project.