How do I share dependencies between Android modules

Question

I have an Android application module (app) and an Android library module (library). Both app and library contain these same dependencies:

dependencies {
             


        

Answer 1

You could do something like this where the project build.gradle will specify the dependencies needed as variable names then in the app build.gradle files you just need to include the variable names. This is very useful when you have many modules and don't want to edit everyone when a version number changes!

project build.gradle

buildscript {
    ext {
        googlePlayServicesVersion = '7.5.0'
        supportLibVersion = '22.2.0'
    }
... (the rest of your repositories/dependency info here) ...
}

ext {
    minSdkVersion=16
    targetSdkVersion=21
    buildToolsVersion='22.0.1'
    compileSdkVersion=21

    //Android Dependencies
    supportV4 = 'com.android.support:support-v4:' + supportLibVersion
    supportAnnotations = 'com.android.support:support-annotations:' + supportLibVersion
    recyclerView = 'com.android.support:recyclerview-v7:' + supportLibVersion
    cardView = 'com.android.support:cardview-v7:' + supportLibVersion
    palette = 'com.android.support:palette-v7:' + supportLibVersion
    appCompat = 'com.android.support:appcompat-v7:' + supportLibVersion
    multidex = 'com.android.support:multidex:1.0.1'
    appCompat = 'com.android.support:appcompat-v7:' + supportLibVersion
    supportDesign = 'com.android.support:design:' + supportLibVersion
    playServicesAnalytics = 'com.google.android.gms:play-services-analytics:' + googlePlayServicesVersion
}

app build.gradle file

dependencies {
   compile rootProject.ext.supportV4
    compile rootProject.ext.appCompat
    compile rootProject.ext.supportAnnotations
    compile rootProject.ext.recyclerView
    compile rootProject.ext.cardView
    compile rootProject.ext.palette
    compile rootProject.ext.appCompat
    compile rootProject.ext.multidex
    compile rootProject.ext.supportDesign
    compile rootProject.ext.playServicesAnalytics

}

Hope that this helps!