Android studio 3.0: Unable to resolve dependency for :app@dexOptions/compileClasspath': Could not resolve project :animators

Solution 1:

With Android Studio 2.3(AS) the project works fine and i can able to run the App. After updating the AS to Android Studio 3.0. i too got the error as below for libraries and build types.

Unable to resolve dependency for ':app@dexOptions/compileClasspath': Could not resolve project : library_Name.

Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve project : library_Name.

To Solve the issue, simply.

What ever the

buildTypes{
          debug{ ... }
          release{ ... }
    }

you have in your (app) build.gradle file, You have to include all the buildTypes{ } with same names as like

buildTypes{
      debug{ ... }
      release{ ... }
}

in to build.gradle files of All libraries/modules included in project.

clean and rebuild the project, the issue will be fixed.

Still issue not fixed, update the gradle-wrapper.properties to

distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

Solution 2:

As stated in the official migration guide, this error is encountered when:

Your app includes a build type that a library dependency does not

android {
  buildTypes {
      release {
          ...
      }
      dexOptions {
          ...
        // release & debug is in project animators
        matchingFallbacks = ['release', 'debug']
      }
      debug {
          ...
      }
    }
}

Correct place to find the info is now this documentation