build.gradle中的未知属性"LibraryVariants"

Question

我在此行的build.gradle中有以下错误:

apply plugin: 'com.google.gms.google-services' 

错误:(56,0)无法为com.android.build.gradle.LibraryExtension类型的对象获取未知属性"LibraryVariants".

它发生在我安装Firebase之后.

怎么解决这个？

Answer 1

错误消息,错误:无法获取com.android.build.gradle.LibraryExtension类型的对象的未知属性"LibraryVariants",表示此插件需要应用于使用该com.android.application插件的模块.

因此,简单的解决方案是仅在您的应用程序模块中包含google-services插件,而不是您的库模块:

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

Answer 2

我遇到了同样的问题并通过更新 gradle 和 google-services 版本解决了它。

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'
        classpath 'com.google.gms:google-services:3.1.1'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Answer 3

将以下内容添加到@project级别的gradle文件中：

classpath 'com.android.tools.build:gradle:1.3.0'
classpath 'com.google.gms:google-services:3.0.0'

将以下内容添加到@app级别的gradle文件中：

// Dependency for Google Sign-In
compile 'com.google.android.gms:play-services-auth:9.4.0'

应用插件

apply plugin: 'com.google.gms.google-services'