Kapt3：java.io.File不能转换为java.lang.String
使用apply plugin: 'kotlin-kapt'并运行Gradle构建我的应用程序时有一个例外：
Caused by: java.lang.ClassCastException: java.io.File cannot be cast to java.lang.String at org.jetbrains.kotlin.gradle.internal.Kapt3KotlinGradleSubplugin.disableAnnotationProcessingInJavaTask(Kapt3KotlinGradleSubplugin.kt:293) at org.jetbrains.kotlin.gradle.internal.Kapt3KotlinGradleSubplugin.buildOptions(Kapt3KotlinGradleSubplugin.kt:156) at org.jetbrains.kotlin.gradle.internal.Kapt3KotlinGradleSubplugin.createKaptKotlinTask(Kapt3KotlinGradleSubplugin.kt:246) at org.jetbrains.kotlin.gradle.internal.Kapt3KotlinGradleSubplugin.apply(Kapt3KotlinGradleSubplugin.kt:136) at org.jetbrains.kotlin.gradle.internal.Kapt3KotlinGradleSubplugin.apply(Kapt3KotlinGradleSubplugin.kt:48) at org.jetbrains.kotlin.gradle.plugin.SubpluginEnvironment.addSubpluginOptions(KotlinPlugin.kt:685) at org.jetbrains.kotlin.gradle.plugin.KotlinAndroidPlugin.processVariantData(KotlinPlugin.kt:452) at org.jetbrains.kotlin.gradle.plugin.KotlinAndroidPlugin.access$processVariantData(KotlinPlugin.kt:326) at org.jetbrains.kotlin.gradle.plugin.KotlinAndroidPlugin$apply$2.execute(KotlinPlugin.kt:370) at org.jetbrains.kotlin.gradle.plugin.KotlinAndroidPlugin$apply$2.execute(KotlinPlugin.kt:326) at org.gradle.internal.event.BroadcastDispatch$ActionInvocationHandler.dispatch(BroadcastDispatch.java:93) at org.gradle.internal.event.BroadcastDispatch$ActionInvocationHandler.dispatch(BroadcastDispatch.java:82) at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:44) at org.gradle.internal.event.BroadcastDispatch.dispatch(BroadcastDispatch.java:79) at org.gradle.internal.event.BroadcastDispatch.dispatch(BroadcastDispatch.java:30) at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93) at com.sun.proxy.$Proxy15.afterEvaluate(Unknown Source) at org.gradle.configuration.project.LifecycleProjectEvaluator.notifyAfterEvaluate(LifecycleProjectEvaluator.java:82) ... 56 more
这个异常发生在配置阶段：
org.gradle.api.ProjectConfigurationException: A problem occurred configuring project ':app'.
更多信息：
- 使用Android Gradle插件2.2.0（试用2.3.0，2. +）
- 使用Kotlin 1.1.1（尝试1.0.4 – 1.0.5-3）
- 使用匕首2.2（试用2.7）
- 使用Realm 1.0（也尝试过最新版本）
- 使用Android数据绑定2.2.0
- 使用Retrolambda
- 不使用Android-apt
根build.gradle ：
buildscript { ext.kotlinVersion = '1.1.1' ext.supportLibraryVersion = '23.2.1' ext.androidPluginVersion = '2.2.0' ext.testSupportLibraryVersion = '0.5' ext.newRelicAgentLibraryVersion = '5.11.0' ext.spekLibraryVersion = '1.0.89' ext.okhttpVersion = '3.6.0' ext.packetZoomVersion = '3.2.25' ext.mockitoLibraryVersion = '1.10.19' ext.powermockLibraryVersion = '1.6.2' repositories { jcenter() mavenCentral() maven { url 'https://maven.fabric.io/public' } } dependencies { classpath "com.android.tools.build:gradle:$androidPluginVersion" classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion" classpath 'me.tatarka:gradle-retrolambda:3.3.0' classpath 'io.fabric.tools:gradle:1.21.6' classpath "io.realm:realm-gradle-plugin:1.0.0" classpath "com.newrelic.agent.android:agent-gradle-plugin:$newRelicAgentLibraryVersion" classpath 'com.google.gms:google-services:3.0.0' } } allprojects { repositories { jcenter() maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' } maven { url 'https://maven.fabric.io/public' } maven { url "https://s3.amazonaws.com/repo.commonsware.com" } maven { url "http://repository.jetbrains.com/all" } mavenLocal() } }
build.gradle模块app ：
apply plugin: 'com.android.application' apply plugin: 'me.tatarka.retrolambda' apply plugin: 'realm-android' apply plugin: 'kotlin-android' apply plugin: 'kotlin-kapt' apply plugin: 'io.fabric' apply plugin: 'newrelic' android { compileSdkVersion 23 buildToolsVersion "25.0.2" dataBinding { enabled = true } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } signingConfigs { config } defaultConfig { applicationId "com.example.android" targetSdkVersion 23 signingConfig signingConfigs.config multiDexEnabled true testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } dexOptions { javaMaxHeapSize "4g" } productFlavors { dev { // dev utilizes minSDKVersion = 21 to allow the Android gradle plugin // to pre-dex each module and produce an APK that can be tested on // Android Lollipop without time consuming dex merging processes. minSdkVersion 21 } prod { // The actual minSdkVersion for the application. minSdkVersion 16 } } buildTypes { release { minifyEnabled true proguardFile 'proguard-support.pro' proguardFile 'proguard-retrofit.pro' proguardFile 'proguard-butterknife.pro' proguardFile 'proguard-retrolambda.pro' proguardFile 'proguard-crashlytics.pro' proguardFile 'proguard-newrelic.pro' proguardFile 'proguard-duktape.pro' proguardFile 'proguard-packetzoom.pro' proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } retrolambda { jvmArgs '-noverify' } if (project.hasProperty('releaseKeyStore') && project.hasProperty('releaseKeyPassword') && project.hasProperty('releaseKeyStorePassword') && project.hasProperty('releaseKeyAlias')) { android.signingConfigs.config.keyAlias = releaseKeyAlias android.signingConfigs.config.storeFile = file(releaseKeyStore) android.signingConfigs.config.storePassword = releaseKeyStorePassword android.signingConfigs.config.keyPassword = releaseKeyPassword } else { android.signingConfigs.config.keyAlias "" android.signingConfigs.config.storeFile null android.signingConfigs.config.storePassword "" android.signingConfigs.config.keyPassword "" } testOptions { unitTests.returnDefaultValues = true } sourceSets { main.java.srcDirs += 'src/main/kotlin' test.java.srcDirs += 'src/test/kotlin' androidTest.java.srcDirs += 'src/androidTest/kotlin' } } kapt { generateStubs = true } dependencies { kapt 'com.github.hotchemi:permissionsdispatcher-processor:2.0.8' kapt 'com.google.dagger:dagger-compiler:2.2' kapt "com.android.databinding:compiler:$androidPluginVersion" kapt "io.realm:realm-annotations:1.0.0" kapt "io.realm:realm-annotations-processor:1.0.0" kapt 'com.jakewharton:butterknife:6.1.0' kapt 'com.github.lukaspili.autodagger2:autodagger2-compiler:1.1' provided 'org.glassfish:javax.annotation:10.0-b28' compile 'com.android.support:multidex:1.0.1' compile "com.android.support:appcompat-v7:$supportLibraryVersion" compile "com.android.support:recyclerview-v7:$supportLibraryVersion" compile "com.android.support:design:$supportLibraryVersion" compile "com.android.support:percent:$supportLibraryVersion" compile "com.android.support:gridlayout-v7:$supportLibraryVersion" compile "com.android.support:cardview-v7:$supportLibraryVersion" compile "com.android.support:customtabs:$supportLibraryVersion" compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4' compile 'io.reactivex:rxandroid:1.2.0' compile 'io.reactivex:rxjava:1.1.4' compile 'com.jakewharton.rxbinding:rxbinding:0.1.0' compile 'com.trello:rxlifecycle:0.5.0' compile 'com.trello:rxlifecycle-components:0.5.0' compile 'com.trello:rxlifecycle-kotlin:0.5.0' compile 'com.google.code.gson:gson:2.3.1' compile 'com.google.dagger:dagger:2.2' compile 'com.jakewharton:butterknife:6.1.0' compile 'com.squareup.picasso:picasso:2.5.2' compile 'me.relex:circleindicator:1.1.3@aar' compile 'com.jakewharton.timber:timber:3.0.2' compile 'com.cocosw:bottomsheet:1.+@aar' compile "com.newrelic.agent.android:android-agent:$newRelicAgentLibraryVersion" compile "com.newrelic.agent.android:class-rewriter:$newRelicAgentLibraryVersion" compile 'me.tatarka:bindingcollectionadapter:0.15' compile 'me.tatarka:bindingcollectionadapter-recyclerview:0.15' compile 'com.github.pwittchen:reactivenetwork:0.1.3' compile 'org.apmem.tools:layouts:1.10@aar' compile 'com.sothree.slidinguppanel:library:3.2.1' compile 'com.squareup.duktape:duktape-android:0.9.5' compile 'com.commonsware.cwac:provider:0.4.1' compile "com.squareup.okhttp3:logging-interceptor:$okhttpVersion" compile 'com.squareup.retrofit2:retrofit:2.0.2' compile 'com.squareup.retrofit2:converter-gson:2.0.2' compile 'com.squareup.retrofit2:converter-scalars:2.0.2' compile 'com.squareup.retrofit2:adapter-rxjava:2.0.2' compile "com.packetzoom:pz-android-sdk:$packetZoomVersion" compile "com.packetzoom:pz-okhttp3-interceptor:$packetZoomVersion" compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion" compile 'org.jetbrains.kotlinx:kotlinx-support-jdk7:0.1' compile('com.crashlytics.sdk.android:crashlytics:2.5.5@aar') { transitive = true; } compile 'com.github.lukaspili.autodagger2:autodagger2:1.1' compile 'com.google.firebase:firebase-messaging:9.4.0' compile 'com.google.android.gms:play-services-analytics:9.4.0' compile 'com.google.android.gms:play-services-gcm:9.4.0' compile 'com.squareup.flow:flow:1.0.0-alpha2-SNAPSHOT' testCompile 'junit:junit:4.12' testCompile 'pl.pragmatists:JUnitParams:1.0.4' testCompile "org.mockito:mockito-core:$mockitoLibraryVersion" testCompile "org.powermock:powermock-api-mockito:$powermockLibraryVersion" testCompile "org.powermock:powermock-module-junit4:$powermockLibraryVersion" testCompile "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion" testCompile "org.jetbrains.spek:spek-api:$spekLibraryVersion" testCompile "org.jetbrains.spek:spek-junit-platform-engine:$spekLibraryVersion" testCompile 'org.junit.platform:junit-platform-runner:1.0.0-M2' testCompile "org.jetbrains.kotlin:kotlin-test:$kotlinVersion" testCompile 'com.natpryce:hamkrest:1.2.3.0' androidTestCompile "com.android.support.test:runner:$testSupportLibraryVersion" androidTestCompile "com.android.support.test:rules:$testSupportLibraryVersion" androidTestCompile 'com.google.dexmaker:dexmaker:1.2' androidTestCompile 'com.google.dexmaker:dexmaker-mockito:1.2' androidTestCompile "org.mockito:mockito-core:$mockitoLibraryVersion" androidTestCompile 'org.hamcrest:hamcrest-integration:1.3' androidTestCompile 'org.hamcrest:hamcrest-core:1.3' androidTestCompile 'org.hamcrest:hamcrest-library:1.3' androidTestCompile "com.android.support:support-annotations:$supportLibraryVersion" } // Plugin declared at the bottom of the build.gradle file according to requirements described in documentation: // https://developers.google.com/android/guides/google-services-plugin#introduction apply plugin: 'com.google.gms.google-services'
我该如何解决这个问题？
事实证明，我一直误用Realm插件，所以问题是在插件应用程序的顺序。 Realm的插件应该在 Kotlin 之后应用：
apply plugin: 'kotlin-android' apply plugin: 'kotlin-kapt' apply plugin: 'realm-android'
这解决了我的问题。