Libmain so ошибка

We have a ReactNative application that has integrated Unity based on react-native-unity-view successfully as a library for quite a long time. However, after most recent updates on ReactNative regarding AndroidX and latest SDK-changes, we’re running into the issue «libmain.so not found». This exception happens on the very first attempt to display a Unity-View.

There is a similar issue on SO, please don’t mark as duplicate as our approach might be different and particulary since we give many many more details here.

There is a running and still working example on GitHub (based on ReactNative 0.57): https://github.com/f111fei/react-native-unity-demo.
As long as this project is based on ReactNative 0.57 and its appropriate gradle-settings, everything works fine.
But as soon as we upgrade to the latest ReactNative version (and even 0.60 for example), which gives us an android-folder that is very different against to the older one), the issue happens with a crash of the application. (We also tried to set up everything from scratch to exclude the possibility that this issue was due to upgrades. With RN 0.57 everything still works fine, with RN 0.60 and above not)

The exception is as follows:

E Unity   : Failed to load 'libmain.so', the application will terminate.
D AndroidRuntime: Shutting down VM
E AndroidRuntime: FATAL EXCEPTION: main
E AndroidRuntime: Process: com.rnunitydemo, PID: 16887
E AndroidRuntime: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.rnunitydemo-bKGyotdcwjVnBxuR9zLE4Q==/base.apk"],nativeLibraryDirectories=[/data/app/com.rnunitydemo-bKGyotdcwjVnBxuR9zLE4Q==/lib/arm64, /data/app/com.rnunitydemo-bKGyotdcwjVnBxuR9zLE4Q==/base.apk!/lib/arm64-v8a, /system/lib64, /product/lib64]]] couldn't find "libmain.so"

First I’m going to list the android-folder and gradle-files from most recent version, where the crash happens. After that, I will list the files where everything works fine:

Not working (newer) Version

./android/build.gradle:

buildscript {
    ext {
        buildToolsVersion = "28.0.3"
        minSdkVersion = 16
        compileSdkVersion = 28
        targetSdkVersion = 28
    }
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath("com.android.tools.build:gradle:3.4.2")
    }
}

allprojects {
    repositories {
        mavenLocal()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url("$rootDir/../node_modules/react-native/android")
        }
        maven {
            // Android JSC is installed from npm
            url("$rootDir/../node_modules/jsc-android/dist")
        }

        google()
        jcenter()
        maven { url 'https://jitpack.io' }
    }
}

./android/settings.gradle:

rootProject.name = 'rnunitydemo'

apply from: file("../node_modules/@react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesSettingsGradle(settings)

include ":UnityExport"
project(":UnityExport").projectDir = file("./UnityExport")


include ':app'

./android/app/build.gradle:

apply plugin: "com.android.application"

import com.android.build.OutputFile

project.ext.react = [
    entryFile: "index.js",
    enableHermes: false,  // clean and rebuild if changing
]

apply from: "../../node_modules/react-native/react.gradle"

def enableSeparateBuildPerCPUArchitecture = false

def enableProguardInReleaseBuilds = false

def jscFlavor = 'org.webkit:android-jsc:+'

def enableHermes = project.ext.react.get("enableHermes", false);

android {
    compileSdkVersion rootProject.ext.compileSdkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        applicationId "com.rnunitydemo"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode 1
        versionName "1.0"
    }
    splits {
        abi {
            reset()
            enable enableSeparateBuildPerCPUArchitecture
            universalApk false  // If true, also generate a universal APK
            include "armeabi-v7a", "x86", "arm64-v8a", "x86_64"
        }
    }
    signingConfigs {
        debug {
            storeFile file('debug.keystore')
            storePassword 'android'
            keyAlias 'androiddebugkey'
            keyPassword 'android'
        }
    }
    buildTypes {
        debug {
            signingConfig signingConfigs.debug
        }
        release {
            signingConfig signingConfigs.debug
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
        }
    }
    // applicationVariants are e.g. debug, release
    applicationVariants.all { variant ->
        variant.outputs.each { output ->
            // For each separate APK per architecture, set a unique version code as described here:
            // https://developer.android.com/studio/build/configure-apk-splits.html
            def versionCodes = ["armeabi-v7a": 1, "x86": 2, "arm64-v8a": 3, "x86_64": 4]
            def abi = output.getFilter(OutputFile.ABI)
            if (abi != null) {  // null for the universal-debug, universal-release variants
                output.versionCodeOverride =
                        versionCodes.get(abi) * 1048576 + defaultConfig.versionCode
            }

        }
    }
}

dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "com.facebook.react:react-native:+"  // From node_modules

    if (enableHermes) {
        def hermesPath = "../../node_modules/hermes-engine/android/";
        debugImplementation files(hermesPath + "hermes-debug.aar")
        releaseImplementation files(hermesPath + "hermes-release.aar")
    } else {
        implementation jscFlavor
    }
}

task copyDownloadableDepsToLibs(type: Copy) {
    from configurations.compile
    into 'libs'
}

apply from: file("../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesAppBuildGradle(project)

./android/UnityExport/build.gradle:

// GENERATED BY UNITY. REMOVE THIS COMMENT TO PREVENT OVERWRITING WHEN EXPORTING AGAIN

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath("com.android.tools.build:gradle:3.4.2")
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        flatDir {
            dirs 'libs'
        }
    }
}

apply plugin: 'com.android.library'


dependencies {
    api fileTree(include: ['*.jar'], dir: 'libs')
}

android {
    compileSdkVersion 28
    buildToolsVersion '28.0.2'

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 28
        ndk {
            abiFilters 'armeabi-v7a', 'x86'
        }
        multiDexEnabled true
        versionCode 1
        versionName '0.1'
    }

    lintOptions {
        abortOnError false
    }

    aaptOptions {
        noCompress = ['.unity3d', '.ress', '.resource', '.obb']
        ignoreAssetsPattern = "!.svn:!.git:!.ds_store:!*.scc:.*:!CVS:!thumbs.db:!picasa.ini:!*~"
    }

    buildTypes {
        debug {
            minifyEnabled false
            useProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'
            signingConfig signingConfigs.debug
            jniDebuggable true
        }
        release {
            minifyEnabled false
            useProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'
            signingConfig signingConfigs.debug
        }
    }

    packagingOptions {
        doNotStrip '*/armeabi-v7a/*.so'
        doNotStrip '*/x86/*.so'
    }


}

All these files above lead to a crash («libmain.so not found») as soon as Unity will be launched.

Working (older) Version

In our previous version, as it can be found on GitHub, everything went fine:

./android/build.gradle:

buildscript {
    ext {
        buildToolsVersion = "27.0.3"
        minSdkVersion = 16
        compileSdkVersion = 27
        targetSdkVersion = 26
        supportLibVersion = "27.1.1"
    }
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.4'
    }
}

allprojects {
    repositories {
        mavenLocal()
        jcenter()
        google()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url "$rootDir/../node_modules/react-native/android"
        }
        flatDir {
            dirs project(':UnityExport').file('libs')
        }
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '4.4'
    distributionUrl = distributionUrl.replace("bin", "all")
}

./android/settings.gradle:

rootProject.name = 'rnunitydemo'
include ':react-native-unity-view'
project(':react-native-unity-view').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-unity-view/android')

include ":UnityExport"
project(":UnityExport").projectDir = file("./UnityExport")

include ':app'

./android/app/build.gradle:

apply plugin: "com.android.application"

import com.android.build.OutputFile

project.ext.react = [
    entryFile: "index.js"
]

apply from: "../../node_modules/react-native/react.gradle"

def enableSeparateBuildPerCPUArchitecture = false

/**
 * Run Proguard to shrink the Java bytecode in release builds.
 */
def enableProguardInReleaseBuilds = false

android {
    compileSdkVersion rootProject.ext.compileSdkVersion
    buildToolsVersion rootProject.ext.buildToolsVersion

    defaultConfig {
        applicationId "com.rnunitydemo"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode 1
        versionName "1.0"
        ndk {
            abiFilters "armeabi-v7a", "x86"
        }
    }

    lintOptions {
        checkReleaseBuilds false
        // Or, if you prefer, you can continue to check for errors in release builds,
        // but continue the build even when errors are found:
        abortOnError false
    }

    splits {
        abi {
            reset()
            enable enableSeparateBuildPerCPUArchitecture
            universalApk false  // If true, also generate a universal APK
            include "armeabi-v7a", "x86"
        }
    }

    signingConfigs {
        release {
            // storeFile file(MYAPP_RELEASE_STORE_FILE)
            // storePassword MYAPP_RELEASE_STORE_PASSWORD
            // keyAlias MYAPP_RELEASE_KEY_ALIAS
            // keyPassword MYAPP_RELEASE_KEY_PASSWORD
        }
    }

    buildTypes {
        debug {
            manifestPlaceholders = [
                "DEBUGGABLE": "true"
            ]
        }
        release {
            manifestPlaceholders = [
                "DEBUGGABLE": "false"
            ]
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
            signingConfig signingConfigs.release
        }
    }
    // applicationVariants are e.g. debug, release
    applicationVariants.all { variant ->
        variant.outputs.each { output ->
            // For each separate APK per architecture, set a unique version code as described here:
            // http://tools.android.com/tech-docs/new-build-system/user-guide/apk-splits
            def versionCodes = ["armeabi-v7a":1, "x86":2]
            def abi = output.getFilter(OutputFile.ABI)
            if (abi != null) {  // null for the universal-debug, universal-release variants
                output.versionCodeOverride =
                        versionCodes.get(abi) * 1048576 + defaultConfig.versionCode
            }
        }
    }
}

dependencies {
    compile project(':react-native-unity-view')
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
    implementation "com.facebook.react:react-native:+"  // From node_modules
}

// Run this once to be able to run the application with BUCK
// puts all compile dependencies into folder libs for BUCK to use
task copyDownloadableDepsToLibs(type: Copy) {
    from configurations.compile
    into 'libs'
}

./android/UnityExport/build.gradle:

(same as above)

There are some other reports according to this issue in the official Unity2D-Forums, but without any working solution. According to a comment we are aware of using the very same abiFilter-Setting in both build.gradle-Files (this from our app and the build-gradle from UnityExport), but it didn’t solve the issue either.

Can someone help please?

** Update **

System information of development machine:

System:
    OS: macOS Mojave 10.14.6
    CPU: (16) x64 Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz
    Memory: 112.35 MB / 32.00 GB
    Shell: 5.0.11 - /usr/local/bin/bash

  SDKs:
    iOS SDK:
      Platforms: iOS 13.2, DriverKit 19.0, macOS 10.15, tvOS 13.2, watchOS 6.1
    Android SDK:
      API Levels: 23, 25, 26, 27, 28, 29
      Build Tools: 23.0.1, 25.0.0, 25.0.1, 25.0.2, 26.0.1, 27.0.3, 28.0.3, 29.0.0, 29.0.2
      System Images: android-29 | Google APIs Intel x86 Atom
      Android NDK: 20.0.5594570
  IDEs:
    Android Studio: 3.5 AI-191.8026.42.35.5900203
    Xcode: 11.2.1/11B500 - /usr/bin/xcodebuild
  Binaries:
    Node: 10.17.0 - /usr/local/opt/node@10/bin/node
    Yarn: 1.16.0 - /usr/local/bin/yarn
    npm: 6.11.3 - /usr/local/opt/node@10/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  npmPackages:
    react: 16.9.0 => 16.9.0
    react-native: 0.61.4 => 0.61.4
  npmGlobalPackages:
    react-native-cli: 2.0.1

OK, I’ve narrowed this down. The issue has nothing to do with Play Asset Delivery specifically, but rather Android’s extractNativeLibs feature. This is configured in bundletool as uncompressNativeLibraries.

When this feature is enabled and working on a modern Android device, you should not to see any .so files inside of /data/app/<package-name-etc>/lib/<abi/ since these files are loaded dynamically from the APK, e.g. split_config.armeabi_v7a.apk. This feature speeds up app download time from Play (we use compression that is better than ZIP’s DEFLATE), improves installation time (don’t need to extract the .so), and reduces disk space used by the app (don’t need to store a DEFLATED + uncompressed .so).

I tested both Unity 2020.1 and 2020.2 with both the «Export Project» feature followed by building an AAB, and Unity’s built-in AAB build. This is 4 possible cases.

Note: I installed each test app via:

java -jar ~/Downloads/bundletool-all-1.4.0.jar build-apks --bundle test.aab --output test.apks
java -jar ~/Downloads/bundletool-all-1.4.0.jar install-apks --apks=test.apks

Case 1: Unity 2020.1 + build AAB within Unity:

java -jar ~/Downloads/bundletool-all-1.4.0.jar dump config --bundle test.aab | grep uncompressNativeLibraries -A 2
    "uncompressNativeLibraries": {
    }
  },

Result: .so files were extracted within /data/app 👎, and app runs fine 👍

Case 2: Unity 2020.1 + Export Project + ./gradlew launcher:bundleDebug:

java -jar ~/Downloads/bundletool-all-1.4.0.jar dump config --bundle launcher/build/outputs/bundle/debug/launcher-debug.aab | grep uncompressNativeLibraries -A 2
    "uncompressNativeLibraries": {
      "enabled": true
    }

Result: .so files were NOT extracted within /data/app 👍, and app runs fine 👍

Case 3: Unity 2020.2 + build AAB within Unity:

java -jar ~/Downloads/bundletool-all-1.4.0.jar dump config --bundle test.aab | grep uncompressNativeLibraries -A 2
    "uncompressNativeLibraries": {
    }
  },

Result: .so files were extracted within /data/app 👎, and app runs fine 👍

Case 4: Unity 2020.2 + Export Project + ./gradlew launcher:bundleDebug:

java -jar ~/Downloads/bundletool-all-1.4.0.jar dump config --bundle launcher/build/outputs/bundle/debug/launcher-debug.aab | grep uncompressNativeLibraries -A 2
    "uncompressNativeLibraries": {
      "enabled": true
    }

Result: .so files were NOT extracted within /data/app 👍, and app crashes 👎

To be clear the above testing was done without any plugins in this GitHub project. These were just empty Unity projects and then we either built the AAB within Unity or ran «Export Project» and then build the AAB from the command line with gradle.

Collectively, this implies that Unity 2020.2 stopped supporting Android’s uncompressNativeLibraries feature. Given the several aforementioned latency and disk usage benefits of this feature, my suspicion is that this was an accidental regression. I’ll see if I can follow-up with Unity about a fix.

Note: as a workaround for someone who urgently needs to use Play Asset Delivery with Unity 2020.2, they could modify this plugin’s code to always set config.optimizations.uncompressNativeLibraries.enabled=false. I don’t really recommend this however, and will check to see if Unity can fix the issue on their end.

У нас есть приложение ReactNative, в которое встроено Unity на основе response- native-unity-view успешно работает как библиотека довольно давно. Однако после последних обновлений ReactNative, касающихся AndroidX и последних SDK-изменений, мы столкнулись с проблемой «libmain.so not found» . Это исключение происходит при самой первой попытке отобразить Unity-View.

Есть похожая проблема на SO, пожалуйста, не помечайте как дубликаты, так как наш подход может быть другим и конкретным, так как мы даем здесь намного больше деталей.

На GitHub есть работающий и работающий пример (на основе ReactNative 0.57): https: / /github.com/f111fei/react-native-unity-demo. Пока этот проект основан на ReactNative 0.57 и соответствующих настройках gradle, все работает отлично. Но как только мы обновляемся до последней версии ReactNative (и даже 0,60, например), которая дает нам папку android, которая сильно отличается от предыдущей), проблема возникает при сбое приложения. (Мы также попытались настроить все с нуля, чтобы исключить возможность возникновения этой проблемы из-за обновлений. С RN 0,57 все по-прежнему работает нормально, с RN 0,60 и выше — нет)

Исключением является следующее:

E Unity   : Failed to load 'libmain.so', the application will terminate.
D AndroidRuntime: Shutting down VM
E AndroidRuntime: FATAL EXCEPTION: main
E AndroidRuntime: Process: com.rnunitydemo, PID: 16887
E AndroidRuntime: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.rnunitydemo-bKGyotdcwjVnBxuR9zLE4Q==/base.apk"],nativeLibraryDirectories=[/data/app/com.rnunitydemo-bKGyotdcwjVnBxuR9zLE4Q==/lib/arm64, /data/app/com.rnunitydemo-bKGyotdcwjVnBxuR9zLE4Q==/base.apk!/lib/arm64-v8a, /system/lib64, /product/lib64]]] couldn't find "libmain.so"

Сначала я собираюсь перечислить android-folder и gradle-файлы из последней версии, где происходит сбой. После этого я перечислю файлы, где все работает нормально:

Не рабочая (более новая) версия

< Сильный > ./ андроид / build.gradle :

buildscript {
    ext {
        buildToolsVersion = "28.0.3"
        minSdkVersion = 16
        compileSdkVersion = 28
        targetSdkVersion = 28
    }
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath("com.android.tools.build:gradle:3.4.2")
    }
}

allprojects {
    repositories {
        mavenLocal()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url("$rootDir/../node_modules/react-native/android")
        }
        maven {
            // Android JSC is installed from npm
            url("$rootDir/../node_modules/jsc-android/dist")
        }

        google()
        jcenter()
        maven { url 'https://jitpack.io' }
    }
}

< Сильный > ./ андроид / settings.gradle :

rootProject.name = 'rnunitydemo'

apply from: file("../node_modules/@react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesSettingsGradle(settings)

include ":UnityExport"
project(":UnityExport").projectDir = file("./UnityExport")


include ':app'

< Сильный > ./ Android / приложение / build.gradle :

apply plugin: "com.android.application"

import com.android.build.OutputFile

project.ext.react = [
    entryFile: "index.js",
    enableHermes: false,  // clean and rebuild if changing
]

apply from: "../../node_modules/react-native/react.gradle"

def enableSeparateBuildPerCPUArchitecture = false

def enableProguardInReleaseBuilds = false

def jscFlavor = 'org.webkit:android-jsc:+'

def enableHermes = project.ext.react.get("enableHermes", false);

android {
    compileSdkVersion rootProject.ext.compileSdkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        applicationId "com.rnunitydemo"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode 1
        versionName "1.0"
    }
    splits {
        abi {
            reset()
            enable enableSeparateBuildPerCPUArchitecture
            universalApk false  // If true, also generate a universal APK
            include "armeabi-v7a", "x86", "arm64-v8a", "x86_64"
        }
    }
    signingConfigs {
        debug {
            storeFile file('debug.keystore')
            storePassword 'android'
            keyAlias 'androiddebugkey'
            keyPassword 'android'
        }
    }
    buildTypes {
        debug {
            signingConfig signingConfigs.debug
        }
        release {
            signingConfig signingConfigs.debug
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
        }
    }
    // applicationVariants are e.g. debug, release
    applicationVariants.all { variant ->
        variant.outputs.each { output ->
            // For each separate APK per architecture, set a unique version code as described here:
            // https://developer.android.com/studio/build/configure-apk-splits.html
            def versionCodes = ["armeabi-v7a": 1, "x86": 2, "arm64-v8a": 3, "x86_64": 4]
            def abi = output.getFilter(OutputFile.ABI)
            if (abi != null) {  // null for the universal-debug, universal-release variants
                output.versionCodeOverride =
                        versionCodes.get(abi) * 1048576 + defaultConfig.versionCode
            }

        }
    }
}

dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "com.facebook.react:react-native:+"  // From node_modules

    if (enableHermes) {
        def hermesPath = "../../node_modules/hermes-engine/android/";
        debugImplementation files(hermesPath + "hermes-debug.aar")
        releaseImplementation files(hermesPath + "hermes-release.aar")
    } else {
        implementation jscFlavor
    }
}

task copyDownloadableDepsToLibs(type: Copy) {
    from configurations.compile
    into 'libs'
}

apply from: file("../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesAppBuildGradle(project)

< Сильный > ./ андроид / UnityExport / build.gradle :

// GENERATED BY UNITY. REMOVE THIS COMMENT TO PREVENT OVERWRITING WHEN EXPORTING AGAIN

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath("com.android.tools.build:gradle:3.4.2")
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        flatDir {
            dirs 'libs'
        }
    }
}

apply plugin: 'com.android.library'


dependencies {
    api fileTree(include: ['*.jar'], dir: 'libs')
}

android {
    compileSdkVersion 28
    buildToolsVersion '28.0.2'

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 28
        ndk {
            abiFilters 'armeabi-v7a', 'x86'
        }
        multiDexEnabled true
        versionCode 1
        versionName '0.1'
    }

    lintOptions {
        abortOnError false
    }

    aaptOptions {
        noCompress = ['.unity3d', '.ress', '.resource', '.obb']
        ignoreAssetsPattern = "!.svn:!.git:!.ds_store:!*.scc:.*:!CVS:!thumbs.db:!picasa.ini:!*~"
    }

    buildTypes {
        debug {
            minifyEnabled false
            useProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'
            signingConfig signingConfigs.debug
            jniDebuggable true
        }
        release {
            minifyEnabled false
            useProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'
            signingConfig signingConfigs.debug
        }
    }

    packagingOptions {
        doNotStrip '*/armeabi-v7a/*.so'
        doNotStrip '*/x86/*.so'
    }


}

Все эти файлы приводят к падению («libmain.so not found»), как только Unity будет запущен.

Рабочая (старая) версия

В нашей предыдущей версии, как это можно найти на GitHub, все прошло нормально :

< Сильный > ./ андроид / build.gradle :

buildscript {
    ext {
        buildToolsVersion = "27.0.3"
        minSdkVersion = 16
        compileSdkVersion = 27
        targetSdkVersion = 26
        supportLibVersion = "27.1.1"
    }
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.4'
    }
}

allprojects {
    repositories {
        mavenLocal()
        jcenter()
        google()
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url "$rootDir/../node_modules/react-native/android"
        }
        flatDir {
            dirs project(':UnityExport').file('libs')
        }
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '4.4'
    distributionUrl = distributionUrl.replace("bin", "all")
}

< Сильный > ./ андроид / settings.gradle :

rootProject.name = 'rnunitydemo'
include ':react-native-unity-view'
project(':react-native-unity-view').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-unity-view/android')

include ":UnityExport"
project(":UnityExport").projectDir = file("./UnityExport")

include ':app'

< Сильный > ./ Android / приложение / build.gradle :

apply plugin: "com.android.application"

import com.android.build.OutputFile

project.ext.react = [
    entryFile: "index.js"
]

apply from: "../../node_modules/react-native/react.gradle"

def enableSeparateBuildPerCPUArchitecture = false

/**
 * Run Proguard to shrink the Java bytecode in release builds.
 */
def enableProguardInReleaseBuilds = false

android {
    compileSdkVersion rootProject.ext.compileSdkVersion
    buildToolsVersion rootProject.ext.buildToolsVersion

    defaultConfig {
        applicationId "com.rnunitydemo"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode 1
        versionName "1.0"
        ndk {
            abiFilters "armeabi-v7a", "x86"
        }
    }

    lintOptions {
        checkReleaseBuilds false
        // Or, if you prefer, you can continue to check for errors in release builds,
        // but continue the build even when errors are found:
        abortOnError false
    }

    splits {
        abi {
            reset()
            enable enableSeparateBuildPerCPUArchitecture
            universalApk false  // If true, also generate a universal APK
            include "armeabi-v7a", "x86"
        }
    }

    signingConfigs {
        release {
            // storeFile file(MYAPP_RELEASE_STORE_FILE)
            // storePassword MYAPP_RELEASE_STORE_PASSWORD
            // keyAlias MYAPP_RELEASE_KEY_ALIAS
            // keyPassword MYAPP_RELEASE_KEY_PASSWORD
        }
    }

    buildTypes {
        debug {
            manifestPlaceholders = [
                "DEBUGGABLE": "true"
            ]
        }
        release {
            manifestPlaceholders = [
                "DEBUGGABLE": "false"
            ]
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
            signingConfig signingConfigs.release
        }
    }
    // applicationVariants are e.g. debug, release
    applicationVariants.all { variant ->
        variant.outputs.each { output ->
            // For each separate APK per architecture, set a unique version code as described here:
            // http://tools.android.com/tech-docs/new-build-system/user-guide/apk-splits
            def versionCodes = ["armeabi-v7a":1, "x86":2]
            def abi = output.getFilter(OutputFile.ABI)
            if (abi != null) {  // null for the universal-debug, universal-release variants
                output.versionCodeOverride =
                        versionCodes.get(abi) * 1048576 + defaultConfig.versionCode
            }
        }
    }
}

dependencies {
    compile project(':react-native-unity-view')
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
    implementation "com.facebook.react:react-native:+"  // From node_modules
}

// Run this once to be able to run the application with BUCK
// puts all compile dependencies into folder libs for BUCK to use
task copyDownloadableDepsToLibs(type: Copy) {
    from configurations.compile
    into 'libs'
}

< Сильный > ./ андроид / UnityExport / build.gradle :

(same as above)

По этой проблеме есть несколько других сообщений в официальные форумы Unity2D, но без какого-либо рабочего решения. Согласно comment мы знаем об использовании одного и того же abiFilter в обоих параметрах build.gradle (это из нашего приложения и из сборки из UnityExport), но это также не решило проблему.

Может кто-нибудь помочь, пожалуйста?

** Обновить **

Системная информация о разработке машины:

System:
    OS: macOS Mojave 10.14.6
    CPU: (16) x64 Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz
    Memory: 112.35 MB / 32.00 GB
    Shell: 5.0.11 - /usr/local/bin/bash

  SDKs:
    iOS SDK:
      Platforms: iOS 13.2, DriverKit 19.0, macOS 10.15, tvOS 13.2, watchOS 6.1
    Android SDK:
      API Levels: 23, 25, 26, 27, 28, 29
      Build Tools: 23.0.1, 25.0.0, 25.0.1, 25.0.2, 26.0.1, 27.0.3, 28.0.3, 29.0.0, 29.0.2
      System Images: android-29 | Google APIs Intel x86 Atom
      Android NDK: 20.0.5594570
  IDEs:
    Android Studio: 3.5 AI-191.8026.42.35.5900203
    Xcode: 11.2.1/11B500 - /usr/bin/xcodebuild
  Binaries:
    Node: 10.17.0 - /usr/local/opt/node@10/bin/node
    Yarn: 1.16.0 - /usr/local/bin/yarn
    npm: 6.11.3 - /usr/local/opt/node@10/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  npmPackages:
    react: 16.9.0 => 16.9.0
    react-native: 0.61.4 => 0.61.4
  npmGlobalPackages:
    react-native-cli: 2.0.1