How to import Unity module to Android project

This post introduces how to import Unity module to Android project.

Before start, I assume you have Android module exported from Unity already.

1. Copy module folder into Android Project folder.

2. Add Unity Module name in settings.gradle

pluginManagement {
    repositories {
        jcenter()
        google()
        mavenCentral()
        gradlePluginPortal()
    }
}

include ':unityLibrary'        //Add this line
project(':unityLibrary').projectDir=newFile('../unityLibrary')        //Add this line

dependencyResolutionManagement {
    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        jcenter()
        google()
        mavenCentral()
        flatDir {
            dirs "${project(':unityLibrary').projectDir}/libs"        //Add this line
        }
    }
}
rootProject.name = "MLCChat"
include ':app'

The "unityLibrary" is replaced if you have another module name.

3. Add Unity module and jar files which Unity module have in build.gradle (Module :app)

dependencies {

    implementation projcet(':unityLibrary')
    implementation fileTree(dir: project(':unityLibrary').getProjectDir().toString() + ('\\libs'), include: ['*.jar'])

    

}

4. Represent abiFilters in build.gradle(Module: app)

android {
    namespace 'ai.mlc.mlcchat'
    compileSdk 34

    defaultConfig {
        applicationId "ai.mlc.mlcchat"
        minSdk 26
        targetSdk 33
        versionCode 1
        versionName "1.0"
        
        ndk {
            abiFilters "armeabi-v7a", "arm64-v8a", "x86", "x86_64"        //Add this line
        }

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        vectorDrawables {
            useSupportLibrary true
        }
    }

   ...
}

✋ abiFilters must be same with Unity abiFilters setting.

5. Copy the options in gradle.properties from Unity module to app's gradle.properties

example)

org.gradle.jvmargs=-Xmx4096M

org.gradle.parallel=true

unityStreamingAssets=

unityTemplateVersion=5

org.gradle.jvmargs=-Xmx4096M -Dfile.encoding=UTF-8
android.useAndroidX=true
kotlin.code.style=official
android.nonTransitiveRClass=true

unityStreamingAssets=zepeto_streamingassets/ZEPETO-INTERNAL
unityTemplateVersion=5

6. Sync Now!

7. Add ndk path in local.properties

## This file must *NOT* be checked into Version Control Systems,
# as it contains information specific to your local configuration.
#
# Location of the SDK. This is only used by Gradle.
# For customization when using a Version Control System, please read the
# header note.
#Tue Mar 19 16:58:42 KST 2024
sdk.dir=C\:\\Users\\07062301\\AppData\\Local\\Android\\Sdk
ndk.dir=C\:\\Users\\07062301\\AppData\\Local\\Android\\Sdk\\ndk\\25.1.8937393

8. Import Unity Module Finish!!

You can find Unity module in left side Android panel.