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

Question

I have just updated my project to use react-native version 0.60.2 . But when I am trying to run an application on Android device it gets crashed after launch screen. I got the following error logs :

E/AndroidRuntime: FATAL EXCEPTION: create_react_context
    Process: com.tjspeed, PID: 3909
    java.lang.UnsatisfiedLinkError: couldn't find DSO to load: libhermes.so
        at com.facebook.soloader.SoLoader.doLoadLibraryBySoName(SoLoader.java:738)
        at com.facebook.soloader.SoLoader.loadLibraryBySoName(SoLoader.java:591)
        at com.facebook.soloader.SoLoader.loadLibrary(SoLoader.java:529)
        at com.facebook.soloader.SoLoader.loadLibrary(SoLoader.java:484)
        at com.facebook.hermes.reactexecutor.HermesExecutor.<clinit>(HermesExecutor.java:20)
        at com.facebook.hermes.reactexecutor.HermesExecutorFactory.create(HermesExecutorFactory.java:27)
        at com.facebook.react.ReactInstanceManager$5.run(ReactInstanceManager.java:949)
        at java.lang.Thread.run(Thread.java:760)

Few suggestions available here : https://github.com/facebook/react-native/issues/25601 but unfortunately none of them worked for me. Please suggest the workaround.

Answer 1

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")
    }