title: com.android.build.transform.api.TransformException with android google play services
body: <p>I'm trying to integrate Google Plus in my application, and it showing following error. below are exception and gradle</p>
  
  <p>Error:Execution failed for task ':app:transformClassesWithDexForDebug'.</p>
  
  <blockquote>
    <p>com.android.build.transform.api.TransformException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_79\bin\java.exe'' finished with non-zero exit value 1</p>
  </blockquote>
  
  <p><strong>app build.gradle</strong></p>
  
  <pre><code>apply plugin: 'com.android.application'
  apply plugin: 'com.google.gms.google-services'
  
  android {
      compileSdkVersion 23
      buildToolsVersion "23.0.1"
  
      defaultConfig {
          applicationId "xxx.com.xxxx"
          multiDexEnabled true
          minSdkVersion 15
          targetSdkVersion 23
          versionCode 1
          versionName "1.0"
      }
  
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      compile 'com.android.support:appcompat-v7:23.0.1'
      //depend-materialcalendar
      compile 'com.prolificinteractive:material-calendarview:0.8.1'
      compile 'com.android.support:gridlayout-v7:23.0.1'
      compile 'com.android.support:cardview-v7:23.0.1'
      compile 'com.melnykov:floatingactionbutton:1.3.0'
      //depend-cometchat
      compile 'com.yalantis:contextmenu:1.0.4'
      compile 'com.google.code.gson:gson:2.3'
      compile files('libs/appcompat_v7.jar')
      compile files('libs/cometchat-sdk.jar')
      compile files('libs/jsoup-1.7.3.jar')
      compile files('libs/picasso-2.5.2.jar')
      compile 'com.google.android.gms:play-services:8.1.0'
      compile 'com.google.android.gms:play-services-base:8.1.0'
      compile 'com.google.android.gms:play-services-maps:8.1.0'
      compile files('libs/volley.jar')
      compile files('libs/PayPalAndroidSDK.jar')
      compile files('libs/gcm.jar')
      compile 'com.soundcloud.android:android-crop:1.0.1@aar'
      compile 'com.facebook.android:facebook-android-sdk:4.6.0'
      compile 'com.android.support:multidex:1.0.0'
      compile 'com.google.android.gms:play-services-plus:8.1.0'
      compile 'com.google.android.gms:play-services-identity:8.1.0'
  
  }
  </code></pre>
  
  <p><strong>project build.gradle</strong></p>
  
  <pre><code>buildscript {
      repositories {
          jcenter()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:1.3.0'
          classpath 'com.google.gms:google-services:1.4.0-beta3'
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          jcenter()
      }
  }
  </code></pre>