How to change the Android app package name when assembling with Gradle?

Question

Is it possible to change the package name of an Android application using Gradle?

I need to compile two copies of the same app, having a unique package name (so I c

Answer 1

From Ethan's answer, both flavorGroups and packageName both are not available anymore. Below works as of March 2015.

android {
...

defaultConfig {
    minSdkVersion 8
    versionCode 10
}

flavorDimensions "flavor"

productFlavors {
    flavor1 {
        flavorDimension "flavor"
        applicationId "com.example.flavor1"
        versionCode 20
    }

    flavor2 {
        flavorDimension "flavor"
        applicationId "com.example.flavor2"
        minSdkVersion 14
    }
}
}