错误：(17,0)无法在类型为org.gradle.api.Project的根项目’booksStudioDir’中找到参数[build_a7zf1o8ge4ow4uolz6kqzw5ov $_run_closure2 @ 19201053]的方法android().

这是我的构建/ gradle文件的示例

buildscript {
repositories {
    maven { url 'https://maven.fabric.io/public' }
}

dependencies {
    classpath 'io.fabric.tools:gradle:1.+'
  }
 }
  apply plugin: 'com.android.application'
apply plugin: 'io.fabric'


android {
compileSdkVersion 21
buildToolsVersion "23.0.1"

defaultConfig {
    applicationId "com.peade.time"
    minSdkVersion 10
    targetSdkVersion 13
}
signingConfigs {
    release {
        storeFile file("/home/bestman/Desktop/mkey/key")
        storePassword "androidkeys"
        keyAlias "peade"
        keyPassword "yes1234"
    }
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.txt'
        signingConfig signingConfigs.release
     }
  }
}
  repositories {
    maven { url 'https://maven.fabric.io/public' }
    mavenCentral()
 }
dependencies {
   compile 'com.edmodo:cropper:1.0.1'
   compile 'com.android.support:support-v4:21.0.3'
   compile 'com.itextpdf:itextpdf:5.5.6'
   //    compile files('libs/commons-lang3-3.3.2.jar')
   compile files('libs/dropBox-android-sdk-1.6.1.jar')
   //    compile files('libs/httpmime-4.0.3.jar')
   compile files('libs/json_simple-1.1.jar')
   compile files('libs/picasso-2.5.2.jar')
   compile('com.crashlytics.sdk.android:crashlytics:2.5.2@aar') {
    transitive = true;
   }
   compile project(':owncloud')
 }