Create and use plug-ins in Android

You can use plug-ins to deliver resources and call Java and C++ code created outside of Unity from your C# scripts. They enable you to access features, like third-party code libraries and operating systems calls, that would otherwise not be available to Unity. For more information about plug-ins with Unity, see Plug-insA set of code created outside of Unity that creates functionality in Unity. There are two kinds of plug-ins you can use in Unity: Managed plug-ins (managed .NET assemblies created with tools like Visual Studio) and Native plug-ins (platform-specific native code libraries). More info
See in Glossary.

This section describes how to create your own plug-ins and use them in Android projects. The information on these pages assumes you already know how to create native plug-ins for Unity. For more information about native plug-ins and their uses, see Native plug-insA platform-specific native code library that is created outside of Unity for use in Unity. Allows you can access features like OS calls and third-party code libraries that would otherwise not be available to Unity. More info
See in Glossary.

Unity as a Library

If you upgrade your project to Unity 2019.4 or above, the introduction of Unity as a Library might require you to adapt your native and managed plug-ins to work properly for Android.