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.

Those errors pointed me to update the 'compile' statement to 'implementation', which I did, still faced some errors which I later solved by updating my google play and firebase sdks to latest version.

Now I have no clue why is my IDE giving the following error (look at the screenshot).

Failed to resolve: runtime

).

Now when I did Build > Clean Project

The error was Could not find runtime.aar (android.arch.lifecycle:runtime:1.0.3). Screen shot

What to do next?

SOLUTION:

1. I updated all my google play services and firebase libs.
2. To solve could not find runtime aar, I just simply arranged the google() on top in repositories.

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

Answer 2

yes ,

If you are getting error like error run time you can change the position of google() in dependencies in build. gradle.. Like below:

repositories {
    google()
    jcenter()

}

Answer 3

Please follow this as same (sequentially) in build.gradle (project: projectName) and issue will be gone

buildscript {

repositories { // keep same this order
    google()
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.1.3'

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
    // can add your other compile types here
    }
}

allprojects { // keep same this order
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
delete rootProject.buildDir
}

Answer 4

Add maven { url 'https://maven.google.com' } as first entry in allprojects/repositories in top level build.gradle

like this:

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