android模块失败transformClassesAndResourcesWithProguardForSigned FAILED

Question

我有一个在android studio中编译好的android项目。我想构建一个签名的apk并决定以命令行方式执行。所以我像这样更新了build.gradle文件。然后，我从项目目录

在命令行上发出命令

gradlew assembleSigned

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.me.myapp"
        minSdkVersion 8
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }

    signingConfigs {
        signed {
            storeFile file('mykeystore.keystore')
            storePassword 'passhere'
            keyAlias 'myalias'
            keyPassword 'keypass'
        }
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        signed {
            debuggable false
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.signed
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile project(':myapplibrary')
}

我编译等，然后结束这些错误。最后说它

：myappmodule：android模块失败transformClassesAndResourcesWithProguardForSgined FAILED