Android Studio 3.1.2 : Failed to resolve: runtime

Question

I have recently updated my Android Studio to 3.1.2 . After the update I tried opening the existing project and was shown multiple gradle errors while compiling the project.

Answer 1

android.arch.lifecycle:runtime is available at the google maven repository. Make sure you add the repository in the repositories block of your build.gradle

allprojects {
    repositories {
        jcenter()
        google()
    }
}

or

allprojects {
    repositories {
        jcenter()
        maven { url "https://maven.google.com" }
    }
}

Reference : Adding Components to your Project