Scala on Android

Structure

A sbt project has the following directory structure:

1. project-root/
   1. project/
      1. Build.scala

         Your actual build configuration. Here you specify your (sub-) projects, manage application dependencies and configure ProGuard.

         You can also manage your build via /build.sbt. However, /project/Build.scala is written in actual Scala code, is slightly more expressive and allows you to keep all of your configuration files in the /project folder.

      2. build.properties

         An optional, but recommended file that specifies the sbt version for this build.

      3. plugins.sbt

         Dependencies for sbt plugins are managed in this file. This is necessary, as we need to rely on Android SDK Plugin for SBT here.

   2. src/
      1. main/
         1. AndroidManifest.xml
         2. res/

            Common Android resource folders such as drawable/ and values/ go here.

         3. java/

            Java source files that may interact with the Scala sources and vice versa.

         4. scala/

            The actual application code is located in this folder if you're not building a Java app with sbt (which is also possible).

      2. test/
         1. AndroidManifest.xml

            Optional manifest file to use when tests are executed

         2. res/
         3. java/
         4. scala/
      3. androidTest/

         A folder for instrumentation tests.