Not able to copy configurations dependencies after upgrading Gradle plugin for Android Studio to 3.0.1 and Gradle to 4.1

Question

I used to copy 'compile' dependencies to a specific folder using this simple gradle task :

task copyLibs(type: Copy) {     from configurations.compile     into "$project.rootDir/reports/libs/" } 

But it stopped working just after upgrading my Android project using gradle plugin 3.0.1 for Android Studio and Gradle tool to 4.1. As the dependency configuration 'compile' is now deprecated by https://developer.android.com/studio/build/gradle-plugin-3-0-0-migration.html#new_configurations I changed it to 'implementation'. However, I am not able to use my copyLibs task as resolving configuration 'implementation' directly is not allowed as per Gradle build error output :

$ ./gradlew.bat clean build  FAILURE: Build failed with an exception.  * What went wrong: Could not determine the dependencies of task ':app:copyLibs'. > Resolving configuration 'implementation' directly is not allowed  * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.  * Get more help at https://help.gradle.org  BUILD FAILED in 1s 

See following my current build.gradle file for app module : apply plugin: 'com.android.application'

android {     compileSdkVersion 26     defaultConfig {         applicationId "newgradle.com.testingnewgradle"         minSdkVersion 21         targetSdkVersion 26         versionCode 1         versionName "1.0"         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"     }     buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     implementation fileTree(dir: 'libs', include: ['*.jar'])     implementation 'com.android.support:appcompat-v7:26.1.0'     implementation 'com.android.support:support-v4:26.1.0'     implementation 'com.android.support:design:26.1.0'     implementation 'com.android.support.constraint:constraint-layout:1.0.2'     testImplementation 'junit:junit:4.12'     androidTestImplementation 'com.android.support.test:runner:1.0.1'     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1' }  task copyLibs(type: Copy) {     from configurations.implementation     into "$project.rootDir/reports/libs/" } build.dependsOn copyLibs 

If I use 'compile' it works but I would like to be compliant with the latest recommendation on this plugin the usage.

I need help to upgrade my copyLibs task in order to work as before upgrading my enviromment. I was using gradle plugin 2.2.3 for Android Studio and Gradle tool 2.14.1.

Answer 1

I make configuration can resolved, so no exception get dependcenies's file

configurations.implementation.setCanBeResolved(true) configurations.api.setCanBeResolved(true)  println configurations.implementation.resolve() println configurations.api.resolve() 

Answer 2

instead of using configurations.implementation, the best option is to use configurations.runtimeClasspath.

You can also think about: compileClasspath default