类型org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler类型的对象的未知属性'supportLibVersion'

Question

我收到以下错误

无法获得类型为org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHand的对象的未知属性'supportLibVersion'

我正在开发本机应用程序，并且本机映射依赖项在下面出现错误

 dependencies {
      def supportLibMajorVersion = supportLibVersion.split('\\.')[0] as int
      def appCompatLibName =  (supportLibMajorVersion < 20) ? "androidx.appcompat:appcompat" : "com.android.support:appcompat-v7"
      implementation "$appCompatLibName:$supportLibVersion"
      implementation('com.facebook.react:react-native:+') {
        exclude group: 'com.android.support'
      }
      implementation "com.google.android.gms:play-services-base:${safeExtGet('playServicesVersion', '16.1.0')}"
      implementation "com.google.android.gms:play-services-maps:${safeExtGet('playServicesVersion', '16.1.0')}"
      implementation 'com.google.maps.android:android-maps-utils:0.5'
    }

谁能知道这是怎么回事？

终端中的错误是

失败：构建失败，发生异常。

其中：
构建文件'D：\ react native \ abhishek \ Gwala \ node_modules \ react-native-maps \ lib \ android \ build.gradle'行：20

出了什么问题：
评估项目'：react-native-maps'时发生问题。
无法获得类型为org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler的对象的未知属性'supportLibVersion'。

第20行是

def supportLibMajorVersion = supportLibVersion.split('\\.')[0] as int

Answer 1

supportLibVersion = "28.0.0"在里面添加android/build.gradle->ext

例：

ext {
  buildToolsVersion = "28.0.3"
  minSdkVersion = 16
  compileSdkVersion = 28
  targetSdkVersion = 28
  supportLibVersion = "28.0.0"
}

Answer 2

加入supportLibVersion = "28.0.0"到buildscript在android/build.gradle

buildscript {
    ext {
        buildToolsVersion = "28.0.3"
        minSdkVersion = 16
        compileSdkVersion = 28
        targetSdkVersion = 28
        supportLibVersion = "28.0.0"  // <=== add this line
    }

    ...
}

https://github.com/react-native-community/react-native-maps/issues/3108#issuecomment-552795543