android jetpack 项目给出了 archlifecycleversion 构建错误

问题描述

我是 android 开发的新手，刚刚按照本教程在 android studio 3.2 ( canary ) 中创建了我的第一个hello world"项目.https://developer.android.com/jetpack/docs/getting-started

I am new to android development and just created my first "hello world" project in android studio 3.2 ( canary ) following this tutorial.https://developer.android.com/jetpack/docs/getting-started

然后我只是做了 Build-> make project 项目试图构建并给我以下错误.

and then I just did Build- > make project project tried to build and gave me following error.

无法获取类型为 org.gradle.api.Project 的根项目JetpackHelloWorld"的未知属性archLifecycleVersion".

更新

依赖

以下是我的应用程序文件夹 build.gradle 文件中的依赖项标签

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
    implementation 'android.arch.lifecycle:extensions:1.1.1'
    implementation "android.arch.lifecycle:extensions:$rootProject.archLifecycleVersion"
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

推荐答案

用实际版本替换 $rootProject.archLifecycleVersion，我猜现在是 1.1.1

Replace $rootProject.archLifecycleVersion with actual version, i guess this is 1.1.1 right now

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