android jetpack项目给出了archlifecycleversion构建错误 [英] android jetpack project gives archlifecycleversion build error

问题描述

我是Android开发的新手，并按照本教程在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 项目尝试构建，并给了我以下错误.

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'.

Could not get unknown property 'archLifecycleVersion' for root project 'JetpackHelloWorld' of type org.gradle.api.Project.

更新

依赖项

以下是我的应用程序文件夹build.gradle文件中的依赖项标记

following is the dependencies tag in my app folder build.gradle file

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，我想现在是1.1.1

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

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