Different dependencies for debug and release in gradle and Android Studio

Build Types (debug, release, or custom) can have their own dependencies.

To specify a dependency specific to a build type, do the following:

dependencies {
    debugCompile "mydebugdependency"
    releaseCompile "myreleasedependency"
}

If your java project and android project are both using gradle, you can do the above in both of their build.gradle files.