Kotlin Coroutines – 启用ProGuard的ClassNotFoundException

我有一个使用Coroutines库的Kotlin编写的已发布的应用程序，主要与Retrofit2一起用于API请求。 我正在使用另一个库， Kotlin Coroutines for Retrofit ，它将Coroutines和Retrofit2联系在一起。
在我的最新版本中，为了减小APK的大小，我将minifyEnabled true设置minifyEnabled true并按照我使用的库的指示添加了ProGuard规则。

问题：
Google Play控制台通知我关于以下设备的崩溃：BQ Aquaris U Plus，Samsung Galaxy Grand Neo Plus，RCA 7 Voyager。 该应用程序在大多数设备上正常工作

堆栈跟踪：

 java.lang.RuntimeException: at kotlinx.coroutines.experimental.DispatchTask.run (CoroutineDispatcher.kt:127) at android.os.Handler.handleCallback (Handler.java:751) at android.os.Handler.dispatchMessage (Handler.java:95) at android.os.Looper.loop (Looper.java:154) at android.app.ActivityThread.main (ActivityThread.java:6119) at java.lang.reflect.Method.invoke (Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:886) at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:776) Caused by: java.util.ServiceConfigurationError: at java.util.ServiceLoader.fail (ServiceLoader.java:225) at java.util.ServiceLoader.-wrap1 (ServiceLoader.java) at java.util.ServiceLoader$LazyIterator.next (ServiceLoader.java:366) at java.util.ServiceLoader$1.next (ServiceLoader.java:448) at kotlinx.coroutines.experimental.CoroutineExceptionHandlerKt.handleCoroutineException (CoroutineExceptionHandler.kt:97) at kotlinx.coroutines.experimental.StandaloneCoroutine.onCancellation (Builders.kt:176) at kotlinx.coroutines.experimental.JobSupport.completeUpdateState$kotlinx_coroutines_core (Job.kt:730) at kotlinx.coroutines.experimental.JobSupport.updateState$kotlinx_coroutines_core (Job.kt:671) at kotlinx.coroutines.experimental.JobSupport.makeCompleting$kotlinx_coroutines_core (Job.kt:1040) at kotlinx.coroutines.experimental.AbstractCoroutine.resumeWithException (AbstractCoroutine.kt:51) at kotlin.coroutines.experimental.jvm.internal.CoroutineImpl.resume (CoroutineImpl.kt:53) at kotlinx.coroutines.experimental.DispatchTask.run (CoroutineDispatcher.kt:123) Caused by: java.lang.ClassNotFoundException: at java.lang.Class.classForName (Native Method) at java.lang.Class.forName (Class.java:400) at java.util.ServiceLoader$LazyIterator.next (ServiceLoader.java:364) Caused by: java.lang.ClassNotFoundException: at dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:56) at java.lang.ClassLoader.loadClass (ClassLoader.java:380) at java.lang.ClassLoader.loadClass (ClassLoader.java:312) 

我的app/build.gradle文件：

 apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'kotlin-android-extensions' apply plugin: 'realm-android' android { compileSdkVersion 27 buildToolsVersion "27.0.3" defaultConfig { applicationId "il.ronmad.speedruntimer" minSdkVersion 19 targetSdkVersion 27 versionCode 26 versionName '3.1' testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" vectorDrawables { useSupportLibrary = true } } buildTypes { release { minifyEnabled true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } debug { minifyEnabled true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } testOptions { unitTests.returnDefaultValues = true } productFlavors { } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } sourceSets { main.java.srcDirs += 'src/main/kotlin' test.java.srcDirs += "src/test/kotlin" androidTest.java.srcDirs += 'src/androidTest/kotlin' } } dependencies { implementation 'com.android.support:appcompat-v7:27.0.2' implementation 'com.android.support:design:27.0.2' implementation 'com.android.support:support-v4:27.0.2' implementation 'com.android.support.constraint:constraint-layout:1.0.2' implementation 'com.google.code.gson:gson:2.8.2' implementation 'com.jaredrummler:colorpicker:1.0.1' implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version" implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:0.20' implementation 'com.squareup.retrofit2:retrofit:2.3.0' implementation 'com.squareup.retrofit2:converter-gson:2.3.0' implementation 'ru.gildor.coroutines:kotlin-coroutines-retrofit:0.8.2' implementation 'com.google.guava:guava:23.6-android' testImplementation 'junit:junit:4.12' testImplementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version" testImplementation "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version" androidTestImplementation 'com.android.support:support-annotations:27.0.2' androidTestImplementation 'com.android.support.test:runner:1.0.1' androidTestImplementation 'com.android.support.test:rules:1.0.1' } repositories { jcenter() } 

我的proguard-rules.pro文件：

 -keepattributes SourceFile,LineNumberTable -renamesourcefileattribute SourceFile -dontobfuscate -dontoptimize -keepattributes Signature -keepattributes Exceptions -keepattributes *Annotation* -keep class il.ronmad.speedruntimer.** { *; } # Gson -dontwarn sun.misc.** -keep class com.google.gson.examples.android.model.** { *; } -keep class * implements com.google.gson.TypeAdapterFactory -keep class * implements com.google.gson.JsonSerializer -keep class * implements com.google.gson.JsonDeserializer # Coroutines -dontwarn org.jetbrains.kotlinx.** -keepclassmembernames class kotlinx.** { volatile ; } # Retrofit -dontnote retrofit2.Platform -dontwarn retrofit2.Platform$Java8 -dontwarn okio.** -dontwarn retrofit2.** -dontwarn javax.annotation.** # Guava -dontwarn com.google.** -dontwarn javax.inject.** -dontwarn sun.misc.Unsafe -dontwarn com.google.common.collect.MinMaxPriorityQueue -dontwarn java.lang.ClassValue -dontwarn com.google.j2objc.annotations.Weak -dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement -dontwarn afu.org.checkerframework.** -dontwarn org.checkerframework.** -keep class com.google.common.collect.Lists { public static ** cartesianProduct(**); } 

我尝试添加下面的ProGuard规则，无济于事：

 -keep class org.jetbrains.kotlinx.** -keep class ru.gildor.coroutines.** 

任何帮助，将不胜感激。 谢谢