Gradle Error:Execution failed for task ':app:p

Question

I am following this link to integrate Google sign-in in my android app.https://developers.google.com/identity/sign-in/android/start-integrating As given in last step on the above given page we have to include dependency

 compile 'com.google.android.gms:play-services-auth:8.3.0' 

in app-level build.gradle file but doing so and building project an error comes saying

Error:Execution failed for task ':app:processDebugGoogleServices'.
> Please fix the version conflict.

build.gradle(Module:app)

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


android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.brainbreaker.socialbuttons"
        minSdkVersion 16
        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'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile 'com.android.support:design:23.0.1'
    compile 'com.google.android.gms:play-services-auth:8.3.0'
}

In the build.gradle file the compile dependency line compile 'com.google.android.gms:play-services-auth:8.3.0' shows error

All com.google.android.gms libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 8.3.0, 8.1.0. Examples include com.google.android.gms:play-services-base:8.3.0 and com.google.android.gms:play-services-measurement:8.1.0 There are some combinations of libraries, or tools and libraries, that are incompatible, or can lead to bugs. One such incompatibility is compiling with a version of the Android support libraries that is not the latest version (or in particular, a version lower than your targetSdkVersion.)

Here are the messages of gradle build.

Information:Gradle tasks [clean, :app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:compileDebugSources, :app:compileDebugAndroidTestSources, :social_buttons:generateDebugSources, :social_buttons:generateDebugAndroidTestSources, :social_buttons:compileDebugSources, :social_buttons:compileDebugAndroidTestSources]
:clean UP-TO-DATE
:app:clean
:social_buttons:clean
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preReleaseBuild UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72301Library
:app:prepareComAndroidSupportDesign2301Library
:app:prepareComAndroidSupportSupportV42301Library
:app:prepareComGoogleAndroidGmsPlayServicesAds810Library
:app:prepareComGoogleAndroidGmsPlayServicesAnalytics810Library
:app:prepareComGoogleAndroidGmsPlayServicesAppindexing810Library
:app:prepareComGoogleAndroidGmsPlayServicesAuth830Library
:app:prepareComGoogleAndroidGmsPlayServicesBase830Library
:app:prepareComGoogleAndroidGmsPlayServicesBasement830Library
:app:prepareComGoogleAndroidGmsPlayServicesMeasurement810Library
:app:prepareDebugDependencies
:app:compileDebugAidl
:app:compileDebugRenderscript
:app:generateDebugBuildConfig
:app:generateDebugAssets UP-TO-DATE
:app:mergeDebugAssets
:app:generateDebugResValues UP-TO-DATE
:app:processDebugGoogleServices
Found com.google.android.gms:play-services-auth:8.3.0, but version 8.1.0 is needed
Found com.google.android.gms:play-services-auth:8.3.0, but version 8.1.0 is needed
Found com.google.android.gms:play-services-auth:8.3.0, but version 8.1.0 is needed
Found com.google.android.gms:play-services-auth:8.3.0, but version 8.1.0 is needed
Found com.google.android.gms:play-services-auth:8.3.0, but version 8.1.0 is needed
:app:processDebugGoogleServices FAILED
Error:Execution failed for task ':app:processDebugGoogleServices'.
> Please fix the version conflict.
Information:BUILD FAILED
Information:Total time: 3.49 secs
Information:1 error
Information:0 warnings
Information:See complete output in console

I am not able to see any way out for this version conflict. Any help is appreciated.

Answer 1

I've solved this problem by deleting the google-services.json file and downloading it again from Firebase console.

Answer 2

I was finding the same error complaining about mixing google play services version when switching from 8.3 to 8.4. Bizarrely I saw reference to the app-measurement lib which I wasn't using.

I thought maybe one of my app's dependencies was referencing the older version so I ran ./gradlew app:dependencies to find the offending library (non were).

But at the top of task output I found a error message saying that the google plugin could not be found and defaulting to google play services 8.3. I used the sample project @TheYann linked to compare. My setup was identical except I applied the apply plugin: 'com.google.gms.google-services' at the top my app's build.gradle file. I moved to bottom of the file and that fixed the gradle compile error.

Answer 3

Ensure that you have done these two things under defaultConfig in Android/app/build.gradle after wiring up Firebase for your Flutter app.

1) Whatever package name you entered while creating your Firebase android project, exactly the same should be updated as your applicationId under defaultConfig.

2) Add the line multiDexEnabled true under defaultConfig.

So defaultConfig{} should now look something like this

defaultConfig {
    applicationId "com.companyName.appName"
    minSdkVersion 16
    targetSdkVersion 27
    multiDexEnabled true
    versionCode flutterVersionCode.toInteger()
    versionName flutterVersionName
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

Answer 4

Important note: You should only apply plugin at bottom of build.gradle (App level)

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

I mistakenly apply this plugin at top of the build.gradle. So I get error.

One more tips : You no need to remove even you use the 3.1.0 or above. Because google not officially announced

   classpath 'com.google.gms:google-services:3.1.0' 

Answer 5

I had the same issue and resolved it by adding the following line in the dependencies of the project-level build.gradle:

classpath 'com.google.gms:google-services:3.0.0'

For a full working example, check out the following project on github.

Hope this helps :)

Answer 6

In my case when i was using firebase services the google.json file was mismatched check once that also