Failed to resolve: android.arch.lifecycle:extensions:1.0.0-alpha1 android studio 3.0

Question

I am building a project in android studio 3.0 with android plugin \'com.android.tools.build:gradle:3.0.0-alpha1\' and gradle version gradle-4.0-milestone-1-al

Answer 1

you can change "https://maven.google.com" to "https://dl.google.com/dl/android/maven2/" to solve the problem.

Answer 2

open preference for mac or you can open setting for windows then search proxy setting inside the open window then unchecked proxy authentication it will work

Answer 3

You require latest gradle version 'com.android.tools.build:gradle:3.0.0-alpha2' and Studio Version 3.0+ to use Room

Answer 4

I have fixed the issue by updating my app build.gradle file like below:

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0-alpha2'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

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

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

Actually had to remove the maven repository from buildscript repositories and added to allprojects repositories as shown above. Also you can keep the maven repository at both places but must include in allprojects repositories to fix the issue.

Answer 5

Add in app/gradle file

compile "android.arch.lifecycle:extensions:1.0.0-alpha4"
compile "android.arch.persistence.room:runtime:1.0.0-alpha4"
annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha4"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0-alpha4"

add maven to project based gradle

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

it will compile easily

Answer 6

Just add maven { url 'https://maven.google.com' } to your project gradle