依赖注入可能是它们中最强大的模式，但是当我与Kotlin结合使用时，我想知道Dagger是否可靠，最重要的是可调试性足以处理大型项目。仅作为gradle中这条指令的一个例子
Error:17:18:39.263 [ERROR] [system.err] warning: Supported source version 'RELEASE_7' from annotation processor '__gen.AnnotationProcessorWrapper_debug_android_arch_persistence_room_RoomProcessor' less than -source '1.8'
17:18:39.263 [ERROR] [system.err] error: cannot access NonExistentClass
17:18:39.263 [ERROR] [system.err] class file for error.NonExistentClass not found
17:18:39.263 [ERROR] [system.err] Consult the following stack trace for details.
17:18:39.267 [ERROR] [system.err] com.sun.tools.javac.code.Symbol$CompletionFailure: class file for error.NonExistentClass not found
17:18:39.363 [ERROR] [system.err] 1 error
17:18:39.363 [ERROR] [system.err] 1 warning
17:18:39.399 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] FAILURE: Build failed with an exception.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * What went wrong:
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Execution failed for task ':app:compileDebugJavaWithJavac'.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] > Compilation failed; see the compiler error output for details.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Exception is:
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:compileDebugJavaWithJavac'.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:100)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:63)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:88)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:248)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:241)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:230)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:124)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:80)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:105)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:99)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:625)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:580)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:99)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Caused by: org.gradle.api.internal.tasks.compile.CompilationFailedException: Compilation failed; see the compiler error output for details.
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:51)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:36)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.delegateAndHandleErrors(NormalizingJavaCompiler.java:99)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:52)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:37)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:35)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:25)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.tasks.compile.JavaCompile.performCompilation(JavaCompile.java:198)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:183)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:120)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at com.android.build.gradle.tasks.factory.AndroidJavaCompile.compile(AndroidJavaCompile.java:95)
17:18:39.403 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$IncrementalTaskAction.doExecute(DefaultTaskClassInfoStore.java:173)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:134)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:121)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:122)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:107)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:111)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:92)
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] ... 27 more
17:18:39.407 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.411 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
17:18:39.411 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Get more help at https://help.gradle.org
17:18:39.411 [ERROR] [org.gradle.internal.buildevents.BuildResultLogger]
17:18:39.411 [ERROR] [org.gradle.internal.buildevents.BuildResultLogger] BUILD FAILED in 41s
产生一个非常长但无用的消息无法访问NonExistent类： 缺少当然是如此困难的信息 1）缺少的类的名称 2）关于该引用所在的代码中的点的任何信息。
显然，这是2016年报道的旧问题： https://github.com/google/dagger/issues/435
要解决此问题，请参阅此处概述的两个步骤： ERROR : error.NonExistentClass Kotlin In multi module Dagger project
请记住，如果没有多模块情况，您可能会遇到此错误。
对我来说，禁止在Kotlin应用程序中使用Dagger。我错过了什么或使用了错误的版本。我也把我的整个gradle文件附在下面！
apply plugin: 'com.android.application'
apply plugin: 'me.tatarka.retrolambda'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
buildscript {
repositories {
jcenter()
mavenCentral()
google()
}
dependencies {
classpath 'me.tatarka:gradle-retrolambda:3.7.0'
}
}
kapt {
generateStubs = true
}
android {
compileSdkVersion rootProject.ext.compileSdkVersion
buildToolsVersion rootProject.ext.buildToolsVersion
defaultConfig {
applicationId "com.codingwords.sobrien.demo"
minSdkVersion rootProject.ext.minSdkVersion
targetSdkVersion rootProject.ext.targetSdkVersion
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
javaCompileOptions {
annotationProcessorOptions {
arguments = ["room.schemaLocation": "$projectDir/schemas".toString()]
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
kapt { generateStubs = true }
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile "com.android.support:appcompat-v7:$rootProject.supportLibraryVersion"
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile "android.arch.persistence.room:runtime:$rootProject.architectureComponentsVersion"
kapt "android.arch.persistence.room:compiler:$rootProject.architectureComponentsVersion"
compile "android.arch.persistence.room:rxjava2:$rootProject.architectureComponentsVersion"
compile "io.reactivex.rxjava2:rxjava:$rootProject.rxjavaVersion"
compile "io.reactivex.rxjava2:rxandroid:$rootProject.rxandroidVersion"
compile "io.reactivex.rxjava2:rxkotlin:$rootProject.rxkotlinVersion"
compile "com.squareup.retrofit2:retrofit:$rootProject.retrofitVersion"
compile "com.squareup.retrofit2:converter-gson:$rootProject.retrofitVersion"
compile 'com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0'
compile "com.squareup.okhttp3:okhttp:$rootProject.okhttpVersion"
compile "com.squareup.okhttp3:logging-interceptor:$rootProject.okhttpVersion"
compile 'com.google.code.gson:gson:2.8.0'
compile "com.google.dagger:dagger:$rootProject.daggerVersion"
kapt "com.google.dagger:dagger-compiler:$rootProject.daggerVersion"
provided 'org.glassfish:javax.annotation:10.0-b28'
compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
testCompile 'junit:junit:4.12'
}
buildscript {
ext.kotlin_version = '1.1.60'
repositories {
jcenter()
google()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.1'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
Project level gradle
allprojects {
repositories {
jcenter()
google()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
ext {
minSdkVersion = 19
targetSdkVersion = 26
compileSdkVersion = 26
buildToolsVersion = "26.0.2"
supportLibraryVersion = "27.0.0"
architectureComponentsVersion = "1.0.0-rc1"
rxjavaVersion = "2.1.3"
rxandroidVersion = "2.0.1"
rxkotlinVersion = "2.1.0"
daggerVersion = "2.11"
retrofitVersion = "2.3.0"
okhttpVersion = "3.9.0"
}
Gradle文件：
{{1}}
答案 0 :(得分：0)
正如kapt docs中所述，NonExistentClass问题的解决方案是将此标记添加到build.gradle：
kapt {
correctErrorTypes = true
}