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-all.zip.

Used maven repo as well:

maven {
            url 'https://maven.google.com'
      }

Also, Using android Room persistence and lifecycle in my project. Already declared below dependencies in my app gradle file:

compile "android.arch.lifecycle:extensions:1.0.0-alpha1"
compile "android.arch.persistence.room:runtime:1.0.0-alpha1"
annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha1"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0-alpha1"

When Sync and build the project it's showing below error:

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

Am I missing something or any other solution for this issue.

https://github.com/googlesamples/android-architecture-components/issues/2 — IntelliJ Amiya, May 31 '17 at 09:15
This error appeared when I was not connected to the Internet. Connecting to the Internet resolved the error. — hexicle, Feb 28 '18 at 16:23

score 30 · Answer 1 · edited Jun 06 '17 at 23:10

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.

And this is why I hate Gradle. – Johann May 31 '19 at 08:46 — Johann, May 31 '19 at 08:46

score 7 · Answer 2 · answered Sep 01 '17 at 12:09

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

score 3 · Answer 3 · edited Sep 13 '18 at 11:55

am find solution work with me Room Dependencies for Room, including testing Room migrations and Room RxJava

dependencies {
    def room_version = "1.1.1"

    implementation "android.arch.persistence.room:runtime:$room_version"
    annotationProcessor "android.arch.persistence.room:compiler:$room_version" // use kapt for Kotlin

    // optional - RxJava support for Room
    implementation "android.arch.persistence.room:rxjava2:$room_version"

    // optional - Guava support for Room, including Optional and ListenableFuture
    implementation "android.arch.persistence.room:guava:$room_version"

    // Test helpers
    testImplementation "android.arch.persistence.room:testing:$room_version"
}

as the document says: https://developer.android.com/topic/libraries/architecture/adding-components

score 2 · Answer 4 · answered Jul 18 '17 at 15:58

2

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

answered Jul 18 '17 at 15:58

粟成建

21
3

score 1 · Answer 5 · answered Oct 17 '17 at 09:14

1

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

answered Oct 17 '17 at 09:14

Android is everything for me

3,781
4
28
37

score 1 · Answer 6 · answered Nov 13 '17 at 12:37

1

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

answered Nov 13 '17 at 12:37

Omar Alnajjar

427
5
10

score 0 · Answer 7 · answered Jul 12 '18 at 06:39

0

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

answered Jul 12 '18 at 06:39

rakesh rajput

606
4
5

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

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