This page describes how to integrate the Unity Runtime Library into Android applications using the Unity as a Library feature.
You can use this feature to include Unity-powered features, such as 3D/2D Real-Time Rendering, ARAugmented Reality (AR) uses computer graphics or video composited on top of a live video feed to augment the view and create interaction with real and virtual objects.
See in Glossary Experience, 3D model interaction, or 2D mini-games, into your application. The Unity Runtime Library exposes controls to manage when and how to load, activate, and unload content within the application.
Important: If you upgrade your project to Unity 2019.4 or above, the introduction of Unity as a Library might require you to adapt native and managed 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 to work properly for Android. Plug-ins that make changes to GradleAn Android build system that automates several build processes. This automation means that many common build errors are less likely to occur. More info
See in Glossary manifests need to use the the Gradle changes outlined in Using Unity as a library in native iOS/Android apps.
You don’t need to do anything different when you build your Gradle project from Unity.
Every Android Gradle project that Unity generates has the following structure:
To integrate Unity into another Android Gradle project, you must include the unityLibrary module of the generated Android Gradle project in your Android Unity Project through the settings.gradle file.
This repository contains example Projects and plug-ins that demonstrate how to integrate Unity into an Android app, along with further documentation.
To control a Player, relay an Intent to launch Unity activity and extend it if needed. For more information, see Android developer documentation on Intents and Intent Filters. You can also use the UnityPlayer Java API.
IUnityPlayerLifecycleEvents provides a way to interact with two important lifecycle events of the Unity Player:
UnityPlayer.unload()unloads the Unity Player. This puts the Unity Player in a paused state where it unloads all ScenesA Scene contains the environments and menus of your game. Think of each unique Scene file as a unique level. In each Scene, you place your environments, obstacles, and decorations, essentially designing and building your game in pieces. More info
IUnityPlayerLifecycleEvents.onUnityPlayerQuittedwhen the Unity Player quits. The process that was running Unity ends after this call.
You can pass an instance of
IUnityPlayerLifecycleEvents to the UnityPlayer constructor, or to override methods in subclasses of
Unity doesn’t control the runtime lifecycle, so Unity as a Library might not work for all possible use cases. Known limitations include: