Unity Flutter


In general, test files should reside inside a test folder located at the root of your Flutter application or package. Test files should always end with test.dart, this is the convention used by the test runner when searching for tests. Flutter Widget With unity. Budget $250-750 USD. Flutter Widget With unity. Hi, I am trying to integrate flutter with unity (AR), the normal demo worked perfectly, but the ar demo still errors appear, and it's not working, so I just need the Demo project working fine if you have worked with that before that will be great.

UIWidgets, Flutter with C# & Unity UIWidgets, Flutter with C# & Unity UIWidgets is an awesome Unity Editor plugin to create cross-platforms Apps inspired by Flutter, using C# instead of Dart. Create a Flutter project and open the Android native part of it (right click the android folder in Android Studio, choose Flutter - Open Android module). Create a native Android view there and use platform channels to display it. Add Unity content to the native view.

Demonstrates how to use the flutter_unity_widget plugin with Unity3D ARKIT using the Unity Foundation Demo.


Run the sample on Android

  1. Open the unity project and build it: Menu -> Flutter -> Export Android
  2. Copy android/UnityExport/libs/unity-classes.jar to android/unity-classes/unity-classes.jar and overwrite the existing file. You only need to do this each time you use a different Unity version.
  3. flutter run

Run the sample on iOS

  1. Open the unity project and build it: Menu -> Flutter -> Export iOS

    Be sure you use at least Unity version 2019.3 or up.

  2. open ios/Runner.xcworkspace (workspace!, not the project) in Xcode and add the exported project in the workspace root (with a right click in the Navigator, not on an item -> Add Files to “Runner” -> add the UnityExport/Unity-Iphone.xcodeproj file

  3. Select the Unity-iPhone/Data folder and change the Target Membership for Data folder to UnityFramework

  4. flutter run


Flutter unity 3D widget for embedding unity in flutter. Now you can make awesome gamified features of your app in Unity and get it rendered in a Flutter app both in fullscreen and embeddable mode. Works great on Android, iPad OS and iOS. There are now two unity app examples in the unity folder, one with the default scene and another based on Unity AR foundation samples.
Note: Supports only Unity 2019.4.3 or later. UnityFramework does not support emulator.

Installation #

First depend on the library by adding this to your packages pubspec.yaml:

Null-safe version:

Now inside your Dart code you can import it.

Preview #

30 fps gifs, showcasing communication between Flutter and Unity:

Setup #

For this, there is also a video tutorial, which you can find a here.

In the tutorial below, there are steps specific to each platform, denoted by a ℹ️ icon followed bythe platform name (Android or iOS). You can click on its icon to expand it.

Prerequisites #

  • An existing Flutter project (if there is none, you can create a new one)

  • An existing Unity project (if there is none, you can create a new one).

  • A FlutterUnityPackage.unitypackage file (you can access the Unity packages in the scripts folder too)

Steps #

  1. Create a folder named unity and move the Unity project into there.

The expected path is unity/project-name/...

  1. Copy the FlutterUnityPackage.unitypackage file into the Unity project folder.

The expected path is unity/project-name/FlutterUnityPackage.unitypackage

  1. Using Unity, open the Unity project, go to File > Build Settings > Player Settings and change the following under the Configuration section:
  • In Scripting Backend, change to IL2CPP

  • In Target Architectures, select ARMv7 and ARM64

:information_source: iOS

Select the appropriate SDK on Target SDK depending on where you want to test or run your app (simulator or physical device).

Be sure you have at least one scene added to your build.

  1. Go to Assets > Import Package > Custom Package and select the FlutterUnityPackage.unitypackage file. Click on Import.

  2. After importing, click on Flutter and select the Export Android option (will export to android/unityLibrary) or the Export iOS option (will export to ios/UnityLibrary).

Do not use Flutter > Export Platform plugin as it was specially added to work with flutter_unity_cli for larger projects.

:information_source: AndroidFlutter unity tutorial

The export script automatically sets things up for you, so you don't have to do anything for Android. But if you want to manually set it up, continue.

6.1. Open the android/settings.gradle file and change the following:

6.2. Open the android/app/build.gradle file and change the following:

6.3. If you need to build a release package, open the android/app/build.gradle file and change the following:

The code above use the debug signConfig for all buildTypes, which can be changed as you well if you need specify signConfig.

6.4. If you use minifyEnabled true in your android/app/build.gradle file, open the android/unityLibrary/proguard-unity.txt and change the following:

6.5. If you want Unity in it's own activity as an alternative, open the android/app/src/main/AndroidManifest.xml and change the following:

:information_source: iOS

6.1. Open the ios/Runner.xcworkspace (workspace, not the project) file in Xcode, right-click on the Navigator (not on an item), go to Add Files to 'Runner' and add the ios/UnityLibrary/Unity-Iphone.xcodeproj file.

6.2. (Optional) Select the Unity-iPhone/Data folder and change the Target Membership for Data folder to UnityFramework.

6.3.1. If you're using Swift, open the ios/Runner/AppDelegate.swift file and change the following:

6.3.2. If you're using Objective-C, open the ios/Runner/main.m file and change the following:

6.4. Open the ios/Runner/Info.plist and change the following:

6.5. Add the UnityFramework.framework file as a library to the Runner project.

Setup AR Foundation

Check out the Unity AR Foundation samples in the demo repository.This repository is not guaranteed to be up-to-date with the latest flutter-unity-view-widget master. Make sure to followthe steps listed below for setting up AR Foundation on iOS and Android in your project.

:information_source: Android
  1. Open the lib/architecture/ folder and check if there are both libUnityARCore.so and libarpresto_api.so files. There seems to be a bug where a Unity export does not include all lib files. If they are missing, use Unity to build a standalone .apk of your AR project, unzip the resulting apk, and copy over the missing .lib files to the unityLibrary module.

  2. Repeat steps 6.1 and 6.2 for Android, replacing unityLibrary with arcore_client, unityandroidpermissions and UnityARCore.

  3. When using UnityWidget in Flutter, set fullscreen: false to disable fullscreen.

:information_source: iOS
  1. Open the ios/Runner/Info.plist and change the following:

Setup Vuforia

Thanks to @PiotrxKolasinski for writing down the exact steps:

  1. Open the android/unityLibrary/build.gradle file and change the following:
  1. Using Android Studio, go to File > Open and select the android/ folder. A new project will open.

Don't worry if the error message 'Project with path ':VuforiaWrapper' could not be found in project ':unityLibrary' appears. The next step will fix it.

  1. In this new project window, go to File > New > New Module > Import .JAR/.AAR package and select the android/unityLibrary/libs/VuforiaWrapper.aar file. A new folder named VuforiaWrapper will be created inside android/. You can now close this new project window.

Communicating #

Flutter-Unity #

  1. On a UnityWidget widget, get the UnityWidgetController received by the onUnityCreated callback.

  2. Use the method postMessage to send a string, using the GameObject name and the name of a behaviour method that should be called.

Unity-Flutter #

  1. Select the GameObject that should execute the communication and go to Inspector > Add Component > Unity Message Manager.
  1. Create a new MonoBehaviour subclass and add to the same GameObject as a script.

  2. On this new behaviour, call GetComponent<UnityMessageManager>() to get a UnityMessageManager.

  3. Use the method SendMessageToFlutter to send a string. Receive this message using the onUnityMessage callback of a UnityWidget.

Troubleshooting #

Location: Unity



  1. Open the unity/project-name/Assets/FlutterUnityIntegration/Editor/Build.cs file.

1.1. On line 48, change the following:

1.2. On line 115, change the following:

Location: Android Studio



  1. Open the android/app/build.gradle file and change the following:

Location: Android Studio



  1. Open the android/build.gradle file and change the following:

Location: Android Studio



  1. Open the android/app/build.gradle file and change the following:

Examples #

Flutter Unity Ads

Simple Example #

Communicating with and from Unity #

Unity Flutter Github

Props #

  • fullscreen (Enable or disable fullscreen mode on Android)


  • pause() (Use this to pause unity player)
  • resume() (Use this to resume unity player)
  • unload() (Use this to unload unity player) *Requires Unity 2019.4.3 or later
  • quit() (Use this to quit unity player)
  • postMessage(String gameObject, methodName, message) (Allows you invoke commands in Unity from flutter)
  • onUnityMessage(data) (Unity to flutter binding and listener)
  • onUnityUnloaded() (Unity to flutter listener when unity is unloaded)
  • onUnitySceneLoaded(String name, int buildIndex, bool isLoaded, bool isValid,) (Unity to flutter binding and listener when new scene is loaded)

Known issues #

  • Remember to disabled fullscreen in unity player settings to disable unity fullscreen.
  • App crashes on screen exit and re-entry do this

    Build Setting - iOS - Other Settings - Configuration - Enable Custom Background Behaviors

Unity Flutter App


Unity Flutter Set

Support this project with your organization. Your donations will be used to help children first and then those in need. Your logo will show up here with a link to your website. [Contribute]

Contributors ✨ #

Thanks goes to these wonderful people (emoji key):

Rex Raphael

Thomas Stockx

Kris Pypen

Lorant Csonka

Unity Flutter Game

This project follows the all-contributors specification. Contributions of any kind welcome!