A scala-based multi-project build. 1 android library and one android project, both using scala (in this case, only the common project has any sources). Also includes usage of an aar, apklib and support-v4 all in libraryDependencies; additionally there is a java-project automatically fetched and built from github.

build.scala

import sbt._
import sbt.Keys._

import android.Keys._

object QicrBuild extends Build {
  lazy val root = Project(id = "qicr", base = file(".")) settings(Seq(
      packageT in Compile <<= packageT in Android in lite,
      packageRelease      <<= packageRelease in Android in lite,
      packageDebug        <<= packageDebug in Android in lite,
      run                 <<= run in Android in lite
    ) ++ android.Plugin.androidCommands: _*
  ) aggregate(lite, common, sirc)

  lazy val sirc = RootProject(uri("https://github.com/sorcix/sIRC.git#7fa7cc7"))

  override def settings = super.settings ++
    Seq(exportJars in (sirc,Compile) := true) ++
      inScope(Global in sirc) (org.sbtidea.SbtIdeaPlugin.settings)

  lazy val lite = Project(id = "lite", base = file("lite")) settings(
      android.Plugin.androidBuild(common) ++ Seq(
        proguardScala in Android := true
      ): _*) dependsOn(common)

  lazy val common = Project(id = "common", base = file("common")) settings(Seq(
    scalacOptions in Compile += "-deprecation",
    javacOptions in Compile  += "-deprecation",

    libraryDependencies ++= Seq(
      "com.viewpagerindicator" % "library" % "2.4.1" % "provided",
      "com.android.support" % "support-v4" % "18.0.0",
      "com.android.support" % "appcompat-v7" % "18.0.0")
  ) ++ android.Plugin.androidBuild: _*) dependsOn(sirc)
}