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I’m building a app for a Pax SmartPOS using the Zoop SmartPOS SDK, it uses Android SDK 23 so I need to use the coreLibraryDesugaringEnabled for it to be able to use the java time Instant.

The problem is that when I enable Desugaring my app doesn’t start, it crashes with the following error:

Failed to register native method com.facebook.react.devsupport.CxxInspectorPackagerConnection$WebSocketDelegate.didFailWithError(Ljava/util/OptionalInt;Ljava/lang/String;)V in /data/app/com.zoop-2/base.apk

The full trace can be found here.

I’ve tried things like downgrading Gradle version but nothing seems to work.

This is my build.gradle (app) file:

apply plugin: "com.android.application"
apply plugin: "org.jetbrains.kotlin.android"
apply plugin: "com.facebook.react"

react {
}

def enableProguardInReleaseBuilds = false

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

android {
    ndkVersion rootProject.ext.ndkVersion
    buildToolsVersion rootProject.ext.buildToolsVersion
    compileSdk rootProject.ext.compileSdkVersion

    namespace "com.zoop"
    defaultConfig {
        applicationId "com.zoop"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode 1
        versionName "1.0"
    }
    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"
        }
    }
    packagingOptions {
        jniLibs {
            useLegacyPackaging = true
        }
    }
    compileOptions {
        coreLibraryDesugaringEnabled = true
    }
}

repositories {
    mavenLocal()
    maven {
        url = uri("https://maven.pkg.github.com/getzoop/zoop-package-public")
        credentials {
            username = ""    // Seu usuário do GitHub.
            password = "" // Sua PAT do GitHub.
        }
    }
}

dependencies {
    // The version of react-native is set by the React Native Gradle Plugin
    implementation("com.facebook.react:react-android")
    implementation("br.zoop.pos.plugin:smartpos-pax-a910:1.8.2")
    implementation("org.jetbrains.kotlin:kotlin-reflect:1.9.22")
    implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.6.0")
    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.1")
    implementation "com.google.code.gson:gson:2.10"
    implementation("com.squareup.okhttp:okhttp:2.5.0")
    implementation("com.squareup.okhttp3:okhttp:4.10.0")

    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.0.4'

    if (hermesEnabled.toBoolean()) {
        implementation("com.facebook.react:hermes-android")
    } else {
        implementation jscFlavor
    }
}

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

And my build.gradle (module) file:

buildscript {
    ext {
        buildToolsVersion = "34.0.0"
        minSdkVersion = 23
        compileSdkVersion = 34
        targetSdkVersion = 34
        ndkVersion = "26.1.10909125"
        kotlinVersion = "1.9.22"
    }
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath("com.android.tools.build:gradle")
        classpath("com.facebook.react:react-native-gradle-plugin")
        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin")
    }
}

apply plugin: "com.facebook.react.rootproject"

2

Answers


  1. Add desugarring sdk in you gradle file.

    dependencies {
    ...
    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.6'
    ...
    }
    
    compileOptions {
    
        //enable desugaring library
        coreLibraryDesugaringEnabled = true
    
        sourceCompatibility JavaVersion.VERSION_11
        targetCompatibility JavaVersion.VERSION_11
    }
    
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  2. The documentation does not suggest to desugar anything.
    Don’t use desugaring, but install and use JDK 17, as required:

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }
    

    "Failed to register native method" usually comes from obfuscation and missing -keep rules.

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