https://issuetracker.google.com/issues/72479188表示插件有时会引入“编译”依赖项，这就是触发警告的原因。可能只是最简单的星号问题，并等待，直到他们修复它，指出哪些插件导致的问题。

我有一个相同的警告导致com.google.gms:google-services。

解决方案是升级classpath com.google。Gms:google-services到类路径'com.google.gms:google-services:3.2.0'在文件中构建。gradle项目:

buildscript {
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.google.gms:google-services:3.2.0'
    }
}

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

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

在Android Studio 3.1版本中，依赖项compliword被替换为 实现

在android studio 3.1中依赖Warning

dependencies {
            compile fileTree(dir: 'libs', include: ['*.jar'])
            compile 'com.android.support:appcompat-v7:27.1.0'
            compile 'com.android.support.constraint:constraint-layout:1.0.2'
            testImplementation 'junit:junit:4.12'
            androidTestImplementation 'com.android.support.test:runner:1.0.1'
            androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    }

在android studio 3.1中确定依赖

    dependencies {
            implementation fileTree(dir: 'libs', include: ['*.jar'])
            implementation 'com.android.support:appcompat-v7:27.1.0'
            implementation 'com.android.support.constraint:constraint-layout:1.0.2'
            testImplementation 'junit:junit:4.12'
            androidTestImplementation 'com.android.support.test:runner:1.0.1'
            androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'

    }

graddel生成的Android Studio 3.1的新项目。

访问https://docs.gradle.org/current/userguide/dependency_management_for_java_projects.html

详情https://docs.gradle.org/current/userguide/declaring_dependencies.html

我已经更新了com.google。Gms:google-services从3.1.1升级到3.2.0，警告停止出现。

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath("com.android.tools.build:gradle:3.1.0")

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
    
    classpath("com.google.gms:google-services:3.2.0")
    }
}

当前版本为4.2.0:

构建脚本 {

repositories {
    google()
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.4.0'

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
    classpath 'com.google.gms:google-services:4.2.0'
}

}

在我的情况下，问题是谷歌服务gradle插件与以下一行在gradle文件:

应用插件:'com.google.gms.google-services'

删除这个就解决了这个问题

在我的情况下，这是由Realm库引起的，在我将它更新到Realm的最新版本(目前为止为5.1.0)后，问题解决了!

下面是gradle的工作脚本:

buildscript {
repositories {
    jcenter()
    google()
}

dependencies {
    classpath 'com.android.tools.build:gradle:3.1.2'
    classpath "io.realm:realm-gradle-plugin:5.1.0"
    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
    classpath 'com.google.gms:google-services:3.2.1'
  }
}