比之前的答案更简单的方法:

把它放到~/.gradle/gradle.properties中

RELEASE_STORE_FILE={path to your keystore}
RELEASE_STORE_PASSWORD=*****
RELEASE_KEY_ALIAS=*****
RELEASE_KEY_PASSWORD=*****

修改你的应用/构建。Gradle，并将其添加到android{代码块:

...    
signingConfigs {

   release {
       storeFile file(RELEASE_STORE_FILE)
       storePassword RELEASE_STORE_PASSWORD
       keyAlias RELEASE_KEY_ALIAS
       keyPassword RELEASE_KEY_PASSWORD

       // Optional, specify signing versions used
       v1SigningEnabled true
       v2SigningEnabled true
   }
}

buildTypes {
        release {
            signingConfig signingConfigs.release
        }
}
....

然后你可以运行gradle assemblerrelease

另请参阅signingConfigs Gradle DSL的参考

android {
    compileSdkVersion 17
    buildToolsVersion "19.0.3"

    defaultConfig {
        minSdkVersion 9
        targetSdkVersion 18
    }

    File signFile = rootProject.file('sign/keystore.properties')
    if (signFile.exists()) {
        Properties properties = new Properties()
        properties.load(new FileInputStream(signFile))
        signingConfigs {
            release {
                storeFile rootProject.file(properties['keystore'])
                storePassword properties['storePassword']
                keyAlias properties['keyAlias']
                keyPassword properties['keyPassword']
            }
        }
    }

    buildTypes {
        release {
            runProguard true
            zipAlign true
            proguardFile rootProject.file('proguard-rules.cfg')
            signingConfig signingConfigs.release
        }
        debug {
            runProguard false
            zipAlign true
        }
    }
}

我设法解决它添加这段代码，并与gradle构建:

android {
    ...
    signingConfigs {
        release {
            storeFile file("release.keystore")
            storePassword "******"
            keyAlias "******"
            keyPassword "******"
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
        }
    }
}

这将生成一个已签名的发布apk文件。

如果您已经拥有密钥存储库文件，那么只需向构建命令中添加一些参数即可:

./gradlew assembleRelease \
 -Pandroid.injected.signing.store.file=$KEYFILE \
 -Pandroid.injected.signing.store.password=$STORE_PASSWORD \
 -Pandroid.injected.signing.key.alias=$KEY_ALIAS \
 -Pandroid.injected.signing.key.password=$KEY_PASSWORD

不需要对Android项目进行永久性更改。

来源:http://www.tinmith.net/wayne/blog/2014/08/gradle-sign-command-line.htm

另一种方法是定义一个只在发行版上运行的任务。

android {
  ...
  signingConfigs {
     release {
        // We can leave these in environment variables
        storeFile file('nameOfKeystore.keystore')
        keyAlias 'nameOfKeyAlias'

        // These two lines make gradle believe that the signingConfigs
        // section is complete. Without them, tasks like installRelease
        // will not be available!
        storePassword "notYourRealPassword"
        keyPassword "notYourRealPassword"

     }
  }
  buildTypes {
     ...
     release {
        signingConfig signingConfigs.release
        ...
     }
  }
  ...
}

task setupKeystore << {
final Console console = System.console();
if (console != null) {
    //def keyFile = console.readLine(“\nProject: “ + project.name + “Enter keystore path: "))
    //def keyAlias = console.readLine(“Project: “ + project.name + “Enter key alias: ")
        def storePw = new String(console.readPassword(“Project: “ + project.name + “. Enter keystore password: "))
        def keyPw  = new String(console.readPassword(“Project: “ + project.name + “.Enter keystore password: "))

    //android.signingConfigs.release.storeFile = file(keyFile);
    //android.signingConfigs.release.keyAlias = keyAlias
        android.signingConfigs.release.storePassword = storePw
        android.signingConfigs.release.keyPassword = keyPw
}
}

//Validate t
def isReleaseConfig = gradle.startParameter.taskNames.any {it.contains('Release') }
if (isReleaseConfig) {
    setupKeystore.execute();
}

Android工作室 转到文件->项目结构或按Ctrl+Alt+Shift+S

查看图片

单击Ok

然后在构建中生成signingconfig。gradle文件。