android - 警告:警告:注释处理器 'RELEASE_7'支持的源版本 'android.arch.lifecycle.LifecycleProcessor'小于-source '1.8'

Question

尝试使用带有架构组件和Kotlin的Android Studio 3 Canary 5构建示例会给出此警告。

谁能告诉我原因？

谢谢，Ove

编辑＃1:
这是Dan Lew前段时间制作的样本

https://github.com/dlew/android-architecture-counter-sample

build.gradle:

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'

android {
    compileSdkVersion 25
    buildToolsVersion rootProject.ext.buildToolsVersion
    defaultConfig {
        applicationId "net.danlew.counter"
        minSdkVersion 23
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

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:${rootProject.ext.supportLibVersion}"
    compile "com.android.support:recyclerview-v7:${rootProject.ext.supportLibVersion}"
    compile "com.android.support:design:${rootProject.ext.supportLibVersion}"
    compile "com.android.support:cardview-v7:${rootProject.ext.supportLibVersion}"
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'

    compile "android.arch.lifecycle:extensions:${rootProject.archLifecycleVersion}"
    compile "android.arch.persistence.room:runtime:${rootProject.archRoomVersion}"
    compile "android.arch.persistence.room:rxjava2:${rootProject.archRoomVersion}"
    kapt "android.arch.lifecycle:compiler:${rootProject.archLifecycleVersion}"
    kapt "android.arch.persistence.room:compiler:${rootProject.archRoomVersion}"
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"

    String butterKnifeVersion = '8.5.1'
    compile "com.jakewharton:butterknife:$butterKnifeVersion"
    kapt "com.jakewharton:butterknife-compiler:$butterKnifeVersion"

    compile 'io.reactivex.rxjava2:rxjava:2.1.0'

    String daggerVersion = '2.10'
    compile "com.google.dagger:dagger:$daggerVersion"
    kapt "com.google.dagger:dagger-compiler:$daggerVersion"

    String rxBindingVersion = '2.0.0'
    compile "com.jakewharton.rxbinding2:rxbinding:$rxBindingVersion"
    compile "com.jakewharton.rxbinding2:rxbinding-kotlin:$rxBindingVersion"

    compile 'com.jakewharton.timber:timber:4.5.1'

    compile 'com.jakewharton.rxrelay2:rxrelay:2.0.0'
}

repositories {
    mavenCentral()
}

Answer 1

现在有一个Java 8注释处理器，拱形组件很稳定，因此请替换:

"android.arch.lifecycle:compiler:${rootProject.archLifecycleVersion}"

与

"android.arch.lifecycle:common-java8:1.0.0"