cordova - 为什么会出现错误：82：变量名无效。必须以字母开头，但是是：'proguard

Question

按照https://developer.android.com/studio/build/gradle-tips#remove-private-signing-information-from-your-project上的步骤时，我收到以下错误并且 Cordova Android 应用程序无法构建：

/platforms/android/build.gradle': 82: Invalid variable name. Must start with a letter but was: ‘proguard

第 82 行是：

proguardFiles getDefaultProguardFile(‘proguard-android.txt’), ‘proguard-rules.pro’

我不知道错误指的是什么。我没有看到任何以字母以外的任何东西开头的变量。build.gradle 文件包括：

// Creates a variable called keystorePropertiesFile, and initializes it to the
// keystore.properties file.
def keystorePropertiesFile = rootProject.file("keystore.properties")

// Initializes a new Properties() object called keystoreProperties.
def keystoreProperties = new Properties()

// Loads the keystore.properties file into the keystoreProperties object.
keystoreProperties.load(new FileInputStream(keystorePropertiesFile))

// https://developer.android.com/studio/build/gradle-tips#remove-private-signing-information-from-your-project

android {
  buildTypes {

  signingConfigs {
    config {
      keyAlias keystoreProperties['keyAlias']
      keyPassword keystoreProperties['keyPassword']
      storeFile file(keystoreProperties['storeFile'])
      storePassword keystoreProperties['storePassword']
    }
  }
//  you will normally want to enable ProGuard only for your release
//  builds, as it’s an additional step that makes the build slower and can make debugging more difficult

    release {
      minifyEnabled true
      proguardFiles getDefaultProguardFile(‘proguard-android.txt’), ‘proguard-rules.pro’
    }
  }
} 

Answer 1