...
android {
  compileSdkVersion rootProject.ext.androidCompileSdkVersion
  buildToolsVersion rootProject.ext.androidBuildToolsVersion

  defaultConfig {
      // 删除了原来对targetSdkVersion, minSdkVersion的定义
      testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      buildConfigField "boolean", "REPORT_CRASH", "true"
  }
  ...
  productFlavors.whenObjectAdded { flavor ->
      def flavorData = rootProject.ext[flavor.name]
      // 删除了原来对applicationId, versionCode, versionName的定义
  }
}