React-Native :java.lang.UnsatisfiedLinkError: couldn't find DSO to load: libhermes.so

I had the same issue after upgrading from 0.59.8 to 0.60.4

Make sure you have added all these lines in your app/build.gradle, especially the dependencies part as this makes sure you have JSC binary

project.ext.react = [

...
    // your index js if not default, other settings
  // Hermes JSC ?
 enableHermes: false,

...
]

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

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

dependencies {

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

    if (enableHermes) {
      // For RN 0.60.x
      def hermesPath = "../../node_modules/hermesvm/android/"

      // --- OR ----          

      // for RN 0.61+
      def hermesPath = "../../node_modules/hermes-engine/android/";


      debugImplementation files(hermesPath + "hermes-debug.aar")
      releaseImplementation files(hermesPath + "hermes-release.aar")
    } else {
      implementation jscFlavor
    }

EDIT

Also, make sure the Hermes Maven repo is in your root build.gradle

maven {
        // Android JSC is installed from npm
        url("$rootDir/../node_modules/jsc-android/dist")
    }

I've just cleaned the build folder for android and after that, it worked fine. Hope that helps mate.

cd android
./gradlew clean 

I added this block in allProject block in project_dir/build.gradle and the crash went away.

    maven {
        // Android JSC is installed from npm
        url("$rootDir/../node_modules/jsc-android/dist")
    }

What I did is to create new project with react-native init and went through the android build files. Fortunately this one was the first difference I noticed and fixed my issue. I guess you could do the same if this doesn't work.

In case you're facing this error while updating to React Native version 0.62.2:

Add the following to your android/app/build.gradle file:

dependencies {
   implementation 'com.facebook.soloader:soloader:0.9.0+'

as one of the first implementation entries.

Solution taken from here

open node_modules/jsc-android/README.md find section 'How to use it with my react Native app'

for example:

modify android/build.gradle

allprojects {
    repositories {
        maven {
            // All of React Native (JS, Android binaries) is installed from npm
            url "$rootDir/../node_modules/react-native/android"
        }
        maven {
            // Local Maven repo containing AARs with JSC library built for Android
            url "$rootDir/../node_modules/jsc-android/dist"
        }
        google()
        jcenter()

    }
}

modify android/app/build.gradle

android {
    packagingOptions {
        pickFirst '**/libjsc.so'
        pickFirst '**/libc++_shared.so'
    }
}
dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation "org.webkit:android-jsc:+"
    implementation "com.facebook.react:react-native:+" // From node_modules
}

i have solved this by adding

 configurations.all {
    resolutionStrategy {
        force "com.facebook.soloader:soloader:0.8.2"
    }
}

For others that run into this issue, there are 2 sections that look similar. You need to update the bottom repositories section in android/build.gradle!

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext {
        buildToolsVersion = "28.0.3"
        minSdkVersion = 16
        compileSdkVersion = 28
        targetSdkVersion = 28
        supportLibVersion = "28.0.0"
    }
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath("com.android.tools.build:gradle:3.4.1")

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

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()
    }
}

I did nothing more. ./gradlew clean solved my problem.

This is because SOLoader is absent.

Ensure

implementation'com.facebook.soloader:soloader:0.9.0+'

is added under dependencies in android/app/build.gradlle

clean your build

cd android

./gradlew clean

Try bundling ./gradlew bundleRelease

Exit android folder cd ../

Try running npx react-native run-android --variant=release

Add this in your project level gradle

allprojects {
    repositories {
        maven {
            url "$rootDir/../node_modules/react-native/android"
        }
        maven {
            // Android JSC is installed from npm
            url("$rootDir/../node_modules/jsc-android/dist")
        }
        mavenLocal()
        google()
        jcenter()
    }
}

After following all advise without success I built an *.apk instead of an *.aab. The APK is 16 MB as opposed to the 8 MB AAB, but I finally got rid of the UnsatisfiedLinkError.

To build an AAB (crashed with UnsatisfiedLinkError):

cd android && ./gradlew clean && ./gradlew bundleRelease

To build an APK (no crash and hermes works fine too):

cd android && ./gradlew clean && ./gradlew assembleRelease

In my case I needed to add hermes path for each android flavour

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

In my case, Hermes was never enabled and yet I encountered this error. Cleaning (via Android Studio) and rebuilding resolved the error.

Try to replace your ndk object inside app/build.gradle

defaultConfig {
...
    ndk {
        abiFilters "armeabi-v7a", "x86"
    }
}

I had this error when I was trying to run with an older version of React Native, prior to 0.60 while in the package.json had a newer version defined (post 0.60).

It happens to me after I updated my android studio, then I clean and build again, it doesn't crash any more.

 maven {
        // Android JSC is installed from npm
        url("$rootDir/../node_modules/jsc-android/dist")
    }

&

Make sure you've installed this - https://www.npmjs.com/package/jsc-android

In my case, it was not there because of some reason.

To avoid this kind of unexpected behavior I've made the choice to use fastlane for all my projects (pretty easy to implement and use). I've created a short lane to clear the project every time I'm looking for a new release.

lane :clean do
    gradle(
      task: "clean"
    )
end

I'm then using this lane on my production lane command

lane :release do
  check_env
  bump
  ...
  clean
  gradle(
    task: 'bundle',
    build_type: 'Release'
  ) 
end

In my case, just turn the enableHermes on in app/build.gradle:

project.ext.react = [
    entryFile   : "index.js",
    enableHermes: true,  // HERE!
]

If any one is still facing the issue even after applying trying all the steps above then here is the solution

In the MainApplication.java, add this import:

import com.facebook.react.BuildConfig;

Solve this problem in a simple way.

apply plugin: "com.android.application"
// def useIntlJsc = false

import com.android.build.OutputFile
project.ext.react = [
    entryFile: "index.js",
    bundleInStaging: true,       // Add this
    bundleInInternalTest: true,  // Add this
    bundleInRelease: true
]

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
    buildToolsVersion rootProject.ext.buildToolsVersion

    defaultConfig {
        applicationId "com.inbox.clean.free.gmail.unsubscribe.smart.email.fresh.mailbox"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode 2597205 //4242929
        versionName "1.6.3"
        multiDexEnabled true
        ndk {
            //  abiFilters "armeabi-v7a", "x86"
                //   abiFilters.clear()

        }

    }

    signingConfigs {
        release {
            if (project.hasProperty('MYAPP_RELEASE_STORE_FILE')) {
                storeFile file(MYAPP_RELEASE_STORE_FILE)
                storePassword MYAPP_RELEASE_STORE_PASSWORD
                keyAlias MYAPP_RELEASE_KEY_ALIAS
                keyPassword MYAPP_RELEASE_KEY_PASSWORD
            }
        }
    }
    buildTypes {

        release {
            minifyEnabled enableProguardInReleaseBuilds
            shrinkResources enableSeparateBuildPerCPUArchitecture
            proguardFiles getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro"
            signingConfig signingConfigs.release
        }
    }



    project.ext.sentryCli = [
        logLevel: "debug",
        flavorAware: false,
        //add
         enableHermes: false
    ]




    compileOptions {
        sourceCompatibility 1.8
        targetCompatibility 1.8
    }


    splits {
        abi {
            reset()
            enable true
            universalApk false  // If true, also generate a universal APK
            include "armeabi-v7a","arm64-v8a","x86","x86_64"
            //"armeabi-v7a" "arm64-v8a" "x86" "x86_64"
            // include "armeabi-v7a", "x86"
            exclude "ldpi", "xxhdpi", "xxxhdpi"
        }
    }

    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, "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 project(':react-native-linear-gradient')
    implementation fileTree(dir: "libs", include: ["*.jar"])

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

}

// 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'
}

apply plugin: 'com.google.gms.google-services'