Centralizing dependencies via dependencies.gradle file
suggest changeWhen working with multi-module projects, it is helpful to centralize dependencies in a single location rather than having them spread across many build files, especially for common libraries such as the Android support libraries and the Firebase libraries.
One recommended way is to separate the Gradle build files, with one build.gradle
per module, as well as one in the project root and another one for the dependencies, for example:
root +- gradleScript/ | dependencies.gradle +- module1/ | build.gradle +- module2/ | build.gradle +- build.gradle
Then, all of your dependencies can be located in gradleScript/dependencies.gradle
:
ext { // Version supportVersion = '24.1.0' // Support Libraries dependencies supportDependencies = [ design: "com.android.support:design:${supportVersion}", recyclerView: "com.android.support:recyclerview-v7:${supportVersion}", cardView: "com.android.support:cardview-v7:${supportVersion}", appCompat: "com.android.support:appcompat-v7:${supportVersion}", supportAnnotation: "com.android.support:support-annotations:${supportVersion}", ] firebaseVersion = '9.2.0'; firebaseDependencies = [ core: "com.google.firebase:firebase-core:${firebaseVersion}", database: "com.google.firebase:firebase-database:${firebaseVersion}", storage: "com.google.firebase:firebase-storage:${firebaseVersion}", crash: "com.google.firebase:firebase-crash:${firebaseVersion}", auth: "com.google.firebase:firebase-auth:${firebaseVersion}", messaging: "com.google.firebase:firebase-messaging:${firebaseVersion}", remoteConfig: "com.google.firebase:firebase-config:${firebaseVersion}", invites: "com.google.firebase:firebase-invites:${firebaseVersion}", adMod: "com.google.firebase:firebase-ads:${firebaseVersion}", appIndexing: "com.google.android.gms:play-services-appindexing:${firebaseVersion}", ]; }
Which can then be applied from that file in the top level file build.gradle
like so:
// Load dependencies apply from: 'gradleScript/dependencies.gradle'
and in the module1/build.gradle
like so:
// Module build file dependencies { // ... compile supportDependencies.appCompat compile supportDependencies.design compile firebaseDependencies.crash }
Another approach
A less verbose approach for centralizing library dependencies versions can be achieved by declaring the version number as a variable once, and using it everywhere.
In the workspace root build.gradle
add this:
ext.v = [ supportVersion:'24.1.1', ]
And in every module that uses the same library add the needed libraries
compile "com.android.support:support-v4:${v.supportVersion}" compile "com.android.support:recyclerview-v7:${v.supportVersion}" compile "com.android.support:design:${v.supportVersion}" compile "com.android.support:support-annotations:${v.supportVersion}"