Execution failed for task ':app:transformClassesWithDexForDebug' while implementing Google sign in for Android

I'm trying to implement Google sign in for Android and I'm following the instructoins via

https://developers.google.com/identity/sign-in/android/start-integrating

But while building the application I'm receiving the following error.

Information:Gradle tasks [:app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:assembleDebug] :app:preBuild UP-TO-DATE :app:preDebugBuild UP-TO-DATE :app:checkDebugManifest :app:preReleaseBuild UP-TO-DATE :app:prepareComAndroidSupportAppcompatV72301Library UP-TO-DATE :app:prepareComAndroidSupportDesign2301Library UP-TO-DATE :app:prepareComAndroidSupportSupportV42301Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAds810Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAnalytics810Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesAppindexing810Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesBase810Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesBasement810Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesIdentity810Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesMeasurement810Library UP-TO-DATE :app:prepareComGoogleAndroidGmsPlayServicesPlus810Library UP-TO-DATE :app:prepareDebugDependencies :app:compileDebugAidl UP-TO-DATE :app:compileDebugRenderscript UP-TO-DATE :app:generateDebugBuildConfig UP-TO-DATE :app:generateDebugAssets UP-TO-DATE :app:mergeDebugAssets UP-TO-DATE :app:generateDebugResValues UP-TO-DATE :app:processDebugGoogleServices No matching client found for package name 'com.questo.rugved.questo' :app:generateDebugResources :app:mergeDebugResources UP-TO-DATE :app:processDebugManifest UP-TO-DATE :app:processDebugResources UP-TO-DATE :app:generateDebugSources UP-TO-DATE :app:preDebugAndroidTestBuild UP-TO-DATE :app:prepareDebugAndroidTestDependencies :app:compileDebugAndroidTestAidl UP-TO-DATE :app:processDebugAndroidTestManifest UP-TO-DATE :app:compileDebugAndroidTestRenderscript UP-TO-DATE :app:generateDebugAndroidTestBuildConfig UP-TO-DATE :app:generateDebugAndroidTestAssets UP-TO-DATE :app:mergeDebugAndroidTestAssets UP-TO-DATE :app:generateDebugAndroidTestResValues UP-TO-DATE :app:generateDebugAndroidTestResources UP-TO-DATE :app:mergeDebugAndroidTestResources UP-TO-DATE :app:processDebugAndroidTestResources UP-TO-DATE :app:generateDebugAndroidTestSources UP-TO-DATE :app:compileDebugJavaWithJavac UP-TO-DATE :app:compileDebugNdk UP-TO-DATE :app:compileDebugSources UP-TO-DATE :app:transformClassesAndResourcesWithExtractJarsForDebug :app:transformClassesWithDexForDebug UNEXPECTED TOP-LEVEL EXCEPTION: Error:Execution failed for task ':app:transformClassesWithDexForDebug'. com.android.build.transform.api.TransformException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/usr/lib/jvm/java-7-oracle/bin/java'' finished with non-zero exit value 2 Information:BUILD FAILED Information:Total time: 1 mins 39.994 secs Information:1 error Information:0 warnings Information:See complete output in console

My top level gradle is

    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()
        }
    }
    

My app level gradle is

<pre>

    apply plugin: 'com.android.application'
    apply plugin: 'com.google.gms.google-services'

    android {
        compileSdkVersion 23
        buildToolsVersion '23.0.1'

        defaultConfig {
            applicationId "com.questo.rugved.questo"
            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'
        compile 'com.android.support:design:23.+'
        compile 'com.google.android.gms:play-services-identity:8.1.0'
        compile 'com.google.android.gms:play-services-plus:8.1.0'
    }

please help.

Solution 1:

Maybe this link helps you. link

That helped me:

android {
...
defaultConfig {
    ...
    multiDexEnabled true
    }
}

Solution 2:

This problem occurs because of multiple inclusion of dependencies. You are including a dependency that is already specified in your build.gradle file. For example:

compile 'com.google.android.gms:play-services:9.0.2'
compile 'com.google.android.gms:play-services-identity:9.0.2'

the above specification of dependency will generate this problem, because play-services includes everything, including play-services-identity, & so, here the same dependency is included for multiple times.

The recommended option is to only include those dependencies that you actually need. If you need play services location & maps, only include these dependencies as:

compile 'com.google.android.gms:play-services-location:9.0.2'
compile 'com.google.android.gms:play-services-maps:9.0.2'

Without including everything with 'com.google.android.gms:play-services:9.0.2'.

In your specific case, I suspect the conflict is arising between google-services of the top level gradle file and play-services-identity & play-services-plus in the app level gradle file. Using only those services that you specifically need resolving multiple inclusion will resolve your issue.

In general, you should not use "multiDexEnabled true" if you don't have a strong & legitimate reason. Using it without knowing the actual problem means that you are bypassing a problem. You are allowing multiple overlapping dependencies yielding a potential source of api conflicts & bigger apk size.