How to import Room Persistence Library to an Android project

Question

I recently saw the new feature announced on Google I/O Room Persistence Library to work with Sqlite databases on Android. I have been looking to the official documentation and I

Answer 1

Open the build.gradle file for your project (not the ones for your app or module) and add:

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

Open the build.gradle file for your app or module and add the artifacts that you need as dependencies:

dependencies {

    implementation "android.arch.persistence.room:runtime:1.0.0"
    annotationProcessor "android.arch.persistence.room:compiler:1.0.0"

}

Reference: Android Adding Components

Answer 2

    * Add these in project level gradle

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


    ext {
        buildToolsVersion = "25.0.2"
        supportLibVersion = "25.3.1"
        archRoomVersion = "1.0.0-alpha1"
    }


    * Add these in module level gradle dependencies

dependencies {

     compile 'android.arch.persistence.room:runtime:' + rootProject.archRoomVersion;
        annotationProcessor 'android.arch.persistence.room:compiler:' + rootProject.archRoomVersion;

}

Answer 3

Android doc:

Add the Google Maven repository Android Studio projects aren't configured to access this repository by default.

To add it to your project, open the build.gradle file for your project (not the ones for your app or module) and add the highlighted line as shown below:

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

Add Architecture Components

Open the build.gradle file for your app or module and add the artifacts that you need as dependencies:

For Lifecycles, LiveData, and ViewModel, add:

implementation "android.arch.lifecycle:runtime:1.0.0-alpha1"
implementation "android.arch.lifecycle:extensions:1.0.0-alpha1"
annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha1"

For Room, add:

implementation "android.arch.persistence.room:runtime:1.0.0-alpha1"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0-alpha1"

Answer 4

As of July 2019 if you wish to use Room with Kotlin, AndroidX, Coroutines or RxJava add lines below.

   // Room
    implementation 'androidx.room:room-runtime:' + rootProject.roomVersion
    // For Kotlin use kapt instead of annotationProcessor
    kapt 'androidx.room:room-compiler:' + rootProject.roomVersion
    // optional - Kotlin Extensions and Coroutines support for Room
    implementation 'androidx.room:room-ktx:' + rootProject.roomVersion
    // optional - RxJava support for Room
    implementation 'androidx.room:room-rxjava2:' + rootProject.roomVersion

Answer 5

It's possible to find the dependencies on the example codelab for the new architecture components.

Root :

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

For Room:

  implementation 'android.arch.persistence.room:runtime:1.0.0-alpha1'
  annotationProcessor 'android.arch.persistence.room:compiler:1.0.0-alpha1'

For Lifecycle dependencies:

  implementation 'android.arch.lifecycle:extensions:1.0.0-alpha1'
  annotationProcessor 'android.arch.lifecycle:compiler:1.0.0-alpha1'

Adding Rxjava2 objects as result for our queries:

  implementation 'android.arch.persistence.room:rxjava2:1.0.0-alpha1'

Test migrations:

  testImplementation'android.arch.persistence.room:testing:1.0.0-alpha1'

Answer 6

Try this to compile Room Persistence library

implementation 'android.arch.persistence.room:runtime:1.1.1';
annotationProcessor 'android.arch.persistence.room:compiler:1.1.1';

And add this in root level build gradle

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