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社区首页 >问答首页 >Kotlin和Dagger应该在一起吗？

问Kotlin和Dagger应该在一起吗？
EN

Stack Overflow用户
提问于 2018-02-16 17:34:50
回答 1查看 569关注 0票数 5

依赖注入可能是所有模式中最强大的模式，但当我与Kotlin结合使用时，我想知道Dagger是否可靠，最重要的是，它是否具有足够的可调试性，可以在大型项目中工作。仅举一个例子，gradle中的这条指令

代码语言：javascript
复制
  kapt "com.google.dagger:dagger-compiler:$rootProject.daggerVersion"

生成一条非常长但无用的消息Cannot access NonExistent类:遗漏当然是非常困难的信息: 1)遗漏的类名；2)关于代码中该引用所在位置的任何信息。

显然，这是2016年报告的一个旧问题：https://github.com/google/dagger/issues/435

要解决这个问题，需要两个步骤：ERROR : error.NonExistentClass Kotlin In multi module Dagger project

请记住，在没有多模块的情况下，您可能会出现此错误。

对我来说，这是禁止在Kotlin应用程序中使用Dagger的。我是不是遗漏了什么或者使用了错误的版本。我也在下面附上了我的整个gradle文件！

代码语言：javascript
复制
      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

Gradle文件：

代码语言：javascript
复制
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"

    }
android
kotlin
EN

回答 1

Stack Overflow用户

发布于 2018-06-09 05:26:54

正如kapt docs中提到的，NonExistentClass问题的解决方案是将此标志添加到您的build.gradle中

代码语言：javascript
复制
kapt {
    correctErrorTypes = true
}
票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/48823754

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