在Android Build中访问Gradle命令行-P变量

Question

首先,我是新手,所以这可能是一个愚蠢的问题,但我无法找到解决方案.我试图在终端中构建一个签名的Android .apk文件,我想使用命令行来传递一些参数:

gradle assembleRelease -PkeyPw='secret123' -PstorePw='secret123' -PkeyAlias='My-Testkey' -PkeyLocation='/home/someUser/test-key.keystore'

现在我想在build.gradle文件中使用这些变量:

signingConfigs {
   release {
      storeFile $keyLocation
      storePassword $storePw
      keyAlias $keyAlias
      keyPassword $keyPw
   }
}

但它们是空的(可能是因为它根本没有任何意义,但我没有找到如何做到这一点).

谢谢你的帮助!

编辑

我使用命令从java运行gradle构建

new ProcessBuilder().inheritIO.command(cmd).start 

并得到以下错误:

FAILURE: Build failed with an exception. 
* Where: 
Build file 'somePlace/app/build.gradle' line: 16 
* What went wrong: 
A problem occurred evaluating project ':app'. 
> Could not find property 'keyLocation' on project ':app'. 
* Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Answer 1

通过-P开关传递的所有属性都可通过project变量访问.所以它将是:

signingConfigs {
   release {
      storeFile project.keyLocation
      storePassword project.storePw
      keyAlias project.keyAlias
      keyPassword project.keyPw
   }
}

project在使用之前检查是否已指定属性是个好主意(以避免出现问题):

signingConfigs {
   release {
      storeFile project.hasProperty('keyLocation') ? project.keyLocation : 'default'
      storePassword project.hasProperty('storePw') ? project.storePw : 'default'
      keyAlias project.hasProperty('keyAlias') ? project.keyAlias : 'default'
      keyPassword project.hasProperty('keyPw') ? project.keyPw : 'default'
   }
}