build.gradle文件：

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        applicationId "xxxxx.com.myapp"
        minSdkVersion 9
        targetSdkVersion 22
        versionCode 3
        versionName "1.2"


    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.1.1'
    compile 'com.google.android.gms:play-services-ads:7.3.0'
    compile files('libs/libGoogleAnalyticsServices.jar')
}

错误日志：

失败：生成失败，发生异常。

• 出了什么问题：任务’：app：dexDebug’的执行失败。

com.android.ide.common.process.ProcessException：org.gradle.process.internal.ExecException：进程’命令’C：\
Program Files \ Java \ jdk1.7.0_51 \ bin \ java.exe’以非零退出值2