Android studio 添加 Java 8 配置出现错误“无法获取未知属性”

Question

build.gradle 配置\xef\xbc\x9a

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apply plugin: \'com.android.application\'\napply plugin: \'realm-android\'\n//apply plugin: \'android-apt\'\n\nandroid {\n    compileSdkVersion 25\n    buildToolsVersion "25.0.0"\n    defaultConfig {\n        applicationId "com.way.event"\n        minSdkVersion 21\n        targetSdkVersion 25\n        versionCode 1\n        versionName "1.0"\n        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"\n        jackOptions {\n            enabled true\n        }\n    }\n    compileOptions {\n        sourceCompatibility JavaVersion.VERSION_1_8\n        targetCompatibility JavaVersion.VERSION_1_8\n    }\n    buildTypes {\n        release {\n            minifyEnabled false\n            proguardFiles getDefaultProguardFile(\'proguard-android.txt\'), \'proguard-rules.pro\'\n        }\n    }\n}\n\ndependencies {\n    compile fileTree(include: [\'*.jar\'], dir: \'libs\')\n    androidTestCompile(\'com.android.support.test.espresso:espresso-core:2.2.2\', {\n        exclude group: \'com.android.support\', module: \'support-annotations\'\n    })\n    compile \'com.android.support:appcompat-v7:25.0.0\'\n    compile \'com.android.support:design:25.0.0\'\n    compile \'com.android.support:support-v4:25.0.0\'\n    testCompile \'junit:junit:4.12\'\n}\n

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它不支持 Java8\xef\xbc\x9a

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错误：无法获取类型为 com.android.build.gradle.internal.pipeline.TransformTask 的任务\n \':app:transformJackWithJackForDebug\' 的未知属性 \'classpath\'。

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跟界域有什么关系吗？怎么解决呢？

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Answer 1

好吧，你仍然可以使用 Retrolambda 代替 Jack，没有人阻止你使用 lambda。

buildscript {
    repositories {
        mavenCentral()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.0'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
        classpath "io.realm:realm-gradle-plugin:1.2.0"
        classpath 'me.tatarka:gradle-retrolambda:3.2.5'
    }
}

和

apply plugin: 'com.android.application'
apply plugin: 'com.neenbedankt.android-apt'
apply plugin: 'me.tatarka.retrolambda'
apply plugin: 'realm-android'

android {
    compileSdkVersion xx
    buildToolsVersion "xx"

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

对于 Java 8 语言功能（lambda、方法引用、try-with-resources）来说效果很好。