Add Components To A Project

Add the Google Maven Repository

build.gradle(Project: project)

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

Add Architecture Components

Note:
For Kotlin use kapt instead of annotationProcessor. Also include the kotlin-kapt plugin.

Main Dependiecies

dependencies {
    // ViewModel and LiveData
    implementation "android.arch.lifecycle:extensions:1.1.0"
    // alternatively, just ViewModel
    implementation "android.arch.lifecycle:viewmodel:1.1.0"
    // alternatively, just LiveData
    implementation "android.arch.lifecycle:livedata:1.1.0"

    annotationProcessor "android.arch.lifecycle:compiler:1.1.0"

    // Room (use 1.1.0-alpha2 for latest alpha)
    implementation "android.arch.persistence.room:runtime:1.0.0"
    annotationProcessor "android.arch.persistence.room:compiler:1.0.0"

    // Paging
    implementation "android.arch.paging:runtime:1.0.0-alpha5"

    // Test helpers for LiveData
    testImplementation "android.arch.core:core-testing:1.1.0"

    // Test helpers for Room
    testImplementation "android.arch.persistence.room:testing:1.0.0"
}

Java 8 Support for LifeCycles

Instead of android.arch.lifecycle:compiler use:

dependencies {
    // Java8 support for Lifecycles
    implementation "android.arch.lifecycle:common-java8:1.1.0"
}

Optional Dependencies for RxJava and ReactiveStreams

dependencies {
    // RxJava support for Room (use 1.1.0-alpha1 for latest alpha)
    implementation "android.arch.persistence.room:rxjava2:1.0.0"

    // ReactiveStreams support for LiveData
    implementation "android.arch.lifecycle:reactivestreams:1.1.0"
}