Scala on Android

[Saifi Khan-3]

Hi all:

Yet another very interesting post on how to setup
Scala on Android environment.

Steps suggested by Robey:

First, copy scala-compiler.jar and scala-library.jar out from
your scala-home and into your android project folder. Since the
compiler is only needed for building, and the library is the
only one you'll need installed, I made a folder for the compiler
and put the library in libs/.

$ mkdir scala-compiler
$ cp $SCALA_HOME/lib/scala-compiler.jar scala-compiler/
$ cp $SCALA_HOME/lib/scala-library.jar libs/



Second, edit build.xml and change the compile task to look like this:

    <target name="compile" depends="dirs, resource-src, aidl">
        <javac encoding="ascii" target="1.5" debug="true" extdirs=""
                srcdir="${srcdir}" includes="**/*.java"
                destdir="${outdir-classes}"
                bootclasspath="${android-jar}">
            <classpath>
                <fileset dir="${external-libs}" includes="*.jar"/>
            </classpath>
         </javac>
         <taskdef resource="scala/tools/ant/antlib.xml"
             classpath="scala-compiler/scala-compiler.jar:${external-libs-ospath}/scala-library.jar" />
         <scalac force="changed" deprecation="on"
                 srcdir="${srcdir}" includes="**/*.scala"
                 destdir="${outdir-classes}"
                 bootclasspath="${android-jar}">
             <classpath>
                 <fileset dir="${external-libs}" includes="*.jar"/>
             </classpath>
         </scalac>
    </target>



Third, you need to edit dx from the android toolkit so that it
gets lots of memory. Uncomment the line with the java heap
option and give it a lot of memory, like 512MB ("-Xmx=512m"). It
needs this because dex is going to convert the entire scala
library into dalvik. Without a lot of memory, it will run out of
heap space.

Checkout the complete post here
http://robey.livejournal.com/54348.html


thanks
Saifi.

[SANAULLAH-2]

2009/7/8 Saifi Khan <saifi.khan@...>:

>
>
> Hi all:
>
> Yet another very interesting post on how to setup
> Scala on Android environment.
>
> Steps suggested by Robey:
>
> First, copy scala-compiler.jar and scala-library.jar out from
> your scala-home and into your android project folder. Since the
> compiler is only needed for building, and the library is the
> only one you'll need installed, I made a folder for the compiler
> and put the library in libs/.
>
> $ mkdir scala-compiler
> $ cp $SCALA_HOME/lib/scala-compiler.jar scala-compiler/
> $ cp $SCALA_HOME/lib/scala-library.jar libs/
>
> Second, edit build.xml and change the compile task to look like this:
>
> <target name="compile" depends="dirs, resource-src, aidl">
> <javac encoding="ascii" target="1.5" debug="true" extdirs=""
> srcdir="${srcdir}" includes="**/*.java"
> destdir="${outdir-classes}"
> bootclasspath="${android-jar}">
> <classpath>
> <fileset dir="${external-libs}" includes="*.jar"/>
> </classpath>
> </javac>
> <taskdef resource="scala/tools/ant/antlib.xml"
> classpath="scala-compiler/scala-compiler.jar:${external-libs-ospath}/scala-library.jar"
> />
> <scalac force="changed" deprecation="on"
> srcdir="${srcdir}" includes="**/*.scala"
> destdir="${outdir-classes}"
> bootclasspath="${android-jar}">
> <classpath>
> <fileset dir="${external-libs}" includes="*.jar"/>
> </classpath>
> </scalac>
> </target>
>
> Third, you need to edit dx from the android toolkit so that it
> gets lots of memory. Uncomment the line with the java heap
> option and give it a lot of memory, like 512MB ("-Xmx=512m"). It
> needs this because dex is going to convert the entire scala
> library into dalvik. Without a lot of memory, it will run out of
> heap space.
>
> Checkout the complete post here
> http://robey.livejournal.com/54348.html
>
> thanks
> Saifi.
>

A sample tutorial:
http://www.ibm.com/developerworks/opensource/library/os-eclipse-scala/index.html?ca=dgr-jw64Android-Scaladth-o&S_TACT=105AGY46&S_CMP=grjw64

Mohamed Sanaulla
http://twitter.com/letmeknowupdate