Recentemente, aumentamos a minSdkVersion do nosso aplicativo de 16 (Jellybean) para 21 (Lollipop). Embora tenhamos testado extensivamente com nosso aplicativo usando predominantemente compilações de depuração, agora estamos enfrentando uma série de falhas de produção na inicialização do aplicativo, predominantemente em dispositivos Samsung mais antigos - (Nota3 e S4 são os principais travadores) e sempre no Lollipop.

O erro é

Fatal Exception: java.lang.NoClassDefFoundError: com.retailconvergence.ruelala.delegate.GoogleLoginDelegate
   at com.retailconvergence.ruelala.delegate.LifecycleDelegateManager.addDelegateOfType(LifecycleDelegateManager.java:48)
   at com.retailconvergence.ruelala.extensions.activity.LifecycleDelegateActivity.addDelegateOfType(LifecycleDelegateActivity.java:55)
   at com.retailconvergence.ruelala.activity.SplashActivity.setupDelegates(SplashActivity.java:198)
   at com.retailconvergence.ruelala.activity.SplashActivity.onCreate(SplashActivity.java:60)
   at android.app.Activity.performCreate(Activity.java:6288)
   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2758)
   at android.app.ActivityThread.access$900(ActivityThread.java:177)
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
   at android.os.Handler.dispatchMessage(Handler.java:102)
   at android.os.Looper.loop(Looper.java:145)
   at android.app.ActivityThread.main(ActivityThread.java:5942)
   at java.lang.reflect.Method.invoke(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:372)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

O SplashActivity é a atividade inicial de lançamento do aplicativo. A classe não encontrada é uma classe estabelecida há muito tempo e não é algo recém-introduzido. Como observação, como parte desta versão mais recente, atualizamos para o Android Studio 3 e introduzimos o código Kotlin, mas acho que não estão relacionados ao problema. Não estamos usando proguard na compilação.

Estou ciente de que houve uma alteração significativa nas compilações quando a minSdkVersion tem 21 anos ou mais, relacionada ao uso de ART em vez de Dalvik, por isso estou me perguntando se há alguma falha nos dispositivos Samsung Lollipop que ainda estão procurando uma classe em o arquivo dex primário agora?

O build.gradle no nível do módulo:

import java.text.SimpleDateFormat
import java.util.concurrent.TimeUnit

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'io.fabric'
apply plugin: 'spoon'

// Manifest version information
def versionMajor = 4
def versionMinor = 2
def versionPatch = 0
def versionBuild = 0  // bump for dogfood builds, public betas, etc.
ext.versionReleaseDate="OCT-13-2017"    // UPDATE THIS WHEN YOU BUMP THE VERSIONS ABOVE FOR A NEW RELEASE MMM-dd-yyy


repositories {
    mavenCentral()
    maven { url 'https://maven.fabric.io/public' }
    maven { url 'http://salesforce-marketingcloud.github.io/JB4A-SDK-Android/repository' }
    maven { url "https://maven.google.com" }
    maven { url "http://maven.tealiumiq.com/android/releases/" }
}

def getCountOfHoursSinceVersionUpdate() {
    def currentDate = new Date()
    def format = new SimpleDateFormat("MMM-dd-yyyy")
    def buildDate = (Date)format.parse(versionReleaseDate)
    return (Integer)((currentDate.getTime() - buildDate.getTime()) / TimeUnit.HOURS.toMillis(1))
}

android {
    compileSdkVersion 26
    buildToolsVersion '26.0.1'

    defaultConfig {
        targetSdkVersion 25

        /**
         * Increment versionCode by commit count
         */

        versionCode       versionMajor * 100000 + versionMinor * 10000 + versionPatch * 1000 + versionBuild + getCountOfHoursSinceVersionUpdate()


        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        // Enabling multidex support. :(
        multiDexEnabled true

        def manifestPath = project(':').file('app/src/androidTest/AndroidManifest.xml')
        buildConfigField "String", "MANIFEST_PATH", "\"" + manifestPath + "\""

        def resPath = project(':').file('app/src/main/res/')
        buildConfigField "String", "RES_PATH", "\"" + resPath + "\""

        def assetPath = project(':').file('app/src/prod/assets/')
        buildConfigField "String", "ASSET_PATH", "\"" + assetPath + "\""

    }

    dexOptions {
        javaMaxHeapSize "8g"
        dexInProcess true // the magic line
    }


    flavorDimensions "debugDimension"

    /**
     * productFlavors override defaultConfig properties as well as force gradle to look in the new
     * folders that we have created to differentiate the build assets and manifests.
     * src/dev, src/prod
     */
    productFlavors {
        dev    {
            minSdkVersion 21
            applicationId "com.retailconvergence.ruelala.dev"
            versionName "${versionMajor}.${versionMinor}.0${versionPatch}"
            manifestPlaceholders = [optimizelyId: "optly4740131949"]
            dimension "debugDimension"
        }

        prod {
            minSdkVersion 21
            applicationId "com.retailconvergence.ruelala"
            versionName "${versionMajor}.${versionMinor}.${versionPatch}"
            manifestPlaceholders = [optimizelyId: "optly4752051515"]
            dimension "debugDimension"
        }
    }

    signingConfigs {
        prod {
            //the key is up a level, don't include in the modules
            storeFile file("../RueLaLaKeystore")
            storePassword "Boutiques"
            keyAlias "rue la la"
            keyPassword "Boutiques"
        }
    }

    buildTypes {
        release {
            signingConfig signingConfigs.prod


            ext.betaDistributionReleaseNotesFilePath = 'release_notes.txt'
            ext.betaDistributionGroupAliases = 'AndroidTesters'
            ext.betaDistributionNotifications = true
        }

        debug {
            versionNameSuffix '-dev'

            signingConfig signingConfigs.prod
            // to get coverage report, set testCoverageEnabled to true and run gradle task called createDevelopmentDebugAndroidTestCoverageReport
            // Note that test coverage doesn't seem to work on Samsung devices, other brand or emulator should work though
            testCoverageEnabled = false

            ext.betaDistributionReleaseNotesFilePath = 'release_notes.txt'
            ext.betaDistributionGroupAliases = 'AndroidTesters'
            ext.betaDistributionNotifications = true

        }
    }

    packagingOptions {
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/NOTICE'
        exclude 'LICENSE.txt'
        exclude 'LICENSE'
        exclude 'READ.ME'
        exclude 'README'
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

configurations {
}

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

    //include our modules
    compile project(':core')
    compile project(':data')

    //android
    final APP_COMPAT_VERSION = '26.1.0'

    compile "com.android.support:appcompat-v7:$APP_COMPAT_VERSION"
    compile "com.android.support:recyclerview-v7:$APP_COMPAT_VERSION"
    compile "com.android.support:design:$APP_COMPAT_VERSION"
    compile "com.android.support:multidex:1.0.0"
    compile "com.android.support:cardview-v7:$APP_COMPAT_VERSION"

    // google
    final PLAY_SERVICES_VERSION = '10.2.4'
    compile "com.google.android.gms:play-services-wallet:$PLAY_SERVICES_VERSION"
    compile "com.google.android.gms:play-services-location:$PLAY_SERVICES_VERSION"
    compile "com.google.android.gms:play-services-gcm:$PLAY_SERVICES_VERSION"
    compile "com.google.android.gms:play-services-plus:$PLAY_SERVICES_VERSION"
    compile "com.google.android.gms:play-services-identity:$PLAY_SERVICES_VERSION"
    compile "com.google.android.gms:play-services-analytics:$PLAY_SERVICES_VERSION"
    compile "com.google.android.gms:play-services-auth:$PLAY_SERVICES_VERSION"
    compile "com.google.android.gms:play-services-maps:$PLAY_SERVICES_VERSION"

    // facebook

    compile 'com.facebook.android:facebook-android-sdk:4.8.+'
    compile 'com.facebook.stetho:stetho:1.1.0'

    //markdown4j
    compile 'org.commonjava.googlecode.markdown4j:markdown4j:2.2-cj-1.0'

    //crashlytics
    compile('com.crashlytics.sdk.android:crashlytics:2.5.2@aar') {
        transitive = true;
    }

    //image zoom
    compile 'com.github.chrisbanes.photoview:library:1.2.3'

    //square
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.makeramen:roundedimageview:2.2.1'


    debugCompile 'com.squareup.leakcanary:leakcanary-android:1.5.1'
    releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.5.1'
    testCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.5.1'

    compile 'com.jakewharton:butterknife:8.6.0'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.6.0'

    // optimizely
    compile('com.optimizely:optimizely:1.4.2@aar') {
        transitive = true
    }

    //braintree
    compile 'com.braintreepayments.api:braintree:2.6.0'
    compile 'com.braintreepayments.api:data-collector:2.+'

    // guava
    compile 'com.google.guava:guava:19.0'

    // sticky headers
    compile 'com.github.mtotschnig:StickyListHeaders:2.7.1'

    // expandable recyclerview
    compile 'eu.davidea:flexible-adapter:5.0.0-rc2'

    //recyclerview animations
    compile 'jp.wasabeef:recyclerview-animators:2.2.3'

    // tooltip
    compile 'com.github.michaelye.easydialog:easydialog:1.4'

    // tealium
    compile 'com.tealium:library:5.3.0'

    // circle indicator
    compile 'me.relex:circleindicator:1.2.2@aar'

    //testing
    final HAMCREST_VERSION = '1.3'

    def jUnit = "junit:junit:4.12"

    // ExactTarget SDK
    compile ('com.salesforce.marketingcloud:marketingcloudsdk:5.0.5') {
        exclude module: 'android-beacon-library' //remove to use Proximity messaging
        exclude module: 'play-services-location' //remove to use Geofence or Proximity messaging
    }

    androidTestCompile jUnit

    // Unit tests dependencies
    testCompile jUnit
    testCompile "org.hamcrest:hamcrest-core:$HAMCREST_VERSION"
    testCompile "org.hamcrest:hamcrest-library:$HAMCREST_VERSION"
    testCompile "org.hamcrest:hamcrest-integration:$HAMCREST_VERSION"
    testCompile 'org.robolectric:robolectric:3.1'
    testCompile 'org.mockito:mockito-core:1.+'
    testCompile 'com.google.guava:guava:19.0'
    testCompile("com.android.support:support-v4:$APP_COMPAT_VERSION") {
        exclude module: 'support-annotations'
    }
    testCompile('org.powermock:powermock-api-mockito:1.6.4') {
        exclude module: 'objenesis'
    }
    testCompile('org.powermock:powermock-module-junit4:1.6.4') {
        exclude module: 'objenesis'
    }
    testCompile 'io.reactivex:rxandroid:1.0.1'
    testCompile 'io.reactivex:rxjava:1.1.0'

    // Espresso
    androidTestCompile('com.android.support.test:runner:0.5') {
        exclude module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test:rules:0.5') {
        exclude module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2') {
        exclude module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test.espresso:espresso-intents:2.2.2') {
        exclude module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test.espresso:espresso-web:2.2.2') {
        exclude module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test.espresso:espresso-contrib:2.2.2') {
        exclude module: 'support-annotations'
        exclude module: 'recyclerview-v7'
        exclude module: 'appcompat-v7'
        exclude module: 'design'
        exclude module: 'support-v4'
    }

    // allows java 8 compile
    compile 'com.annimon:stream:1.1.2'

    // For taking screenshots
    androidTestCompile 'com.squareup.spoon:spoon-client:1.7.0'

    testCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.2'
    compile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.2'
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
}

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

spoon {
    noAnimations = true
    grantAllPermissions = true
}

apply plugin: 'devicefarm'

devicefarm {
    projectName "Rue Mobile"
    devicePool "Smoke Test Pool"
    useUnmeteredDevices()
    authentication {
        accessKey System.getenv("AWS_DEVICE_FARM_ACCESS_KEY")
        secretKey System.getenv("AWS_DEVICE_FARM_SECRET_KEY")
    }
}