‘com.android.support:appcompat-v7:27.1.1’与com.google.android.gms冲突：play-services-maps：15.0.1？

apply plugin: 'com.android.application'

android {
  compileSdkVersion 27
  defaultConfig {
    applicationId "com.gamecodeschool.mapso"
    minSdkVersion 18
    targetSdkVersion 27
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  }
  buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
  }
}

dependencies {
  implementation fileTree(dir: 'libs', include: ['*.jar'])
  implementation 'com.android.support:appcompat-v7:27.1.0'
  implementation 'com.google.android.gms:play-services-maps:15.0.1'
  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'
}

我的顶级构建文件

    // 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:3.1.3'


    // 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
}

在终端中,如果您通过执行./gradlew app：dependencies来查找依赖关系树,您将获得包含以下内容的内容：

+--- com.google.android.gms:play-services-maps:15.0.1
|    +--- com.google.android.gms:play-services-base:[15.0.1,16.0.0) -> 15.0.1
|    |    +--- com.google.android.gms:play-services-basement:[15.0.1] -> 15.0.1
|    |    |    \--- com.android.support:support-v4:26.1.0
|    |    |         +--- com.android.support:support-compat:26.1.0 -> 27.1.0 (*)
|    |    |         +--- com.android.support:support-media-compat:26.1.0

显然,这会导致冲突,解决此问题的方法将改为com.android.support:appcompat-v7:26.1.0.

此外,您必须降级compileSdkVersion和targetSdkVersion.