I did everything exactly like mentioned in your README and I want to deploy a "Hello world" app on an Android device. With pure Java, no problem, with Scala nature and AndroidProguard Nature, I get the error

dalvikvm: Failed resolving Lde/meintest/helloworld/MainActivity; interface 540 'Lscala/ScalaObject;'
dalvikvm: Link of class 'Lde/meintest/helloworld/MainActivity;' failed
AndroidRuntime: Shutting down VM
[...]

It seems that the ScalaObject is not included into the apk file? I only found this in MainActivity.smali

.class public Lde/meintest/helloworld/MainActivity;
.super Landroid/app/Activity;
.source "MainActivity.scala"

# interfaces
.implements Lscala/ScalaObject;

I found this topic on stackoverflow (Netbeans, but the same error): http://stackoverflow.com/questions/2626471/grafting-scala-2-8-into-a-netbeans-nbandroid-project-what-steps-am-i-missing with one possible solution:

I had the same problem and finally found the solution:)

In my case, I was not changing the value of property out.dex.input.absolute.dir (in SDK Tools r8) to jar file that was generated by Proguard. So, the ScalaObject interface was really not present in apk file.

(I discovered that using great apktool.)

So is this an AndroidProguardScala or Proguard problem?

Applicaiton Build return this error on every build Could not initialize class com.kenai.jaffl.struct.Constants

Tried with eclipse Indigo and Juno , and with ScalaIde 2.0.2 and 2.1 M2

Hi.

Great work on this plugin, it's the first solution that actually seems to work somewhat for scala on android.

However, I'm getting some errors from the presentation compiler like the one mentioned in the title, another that comes to mind is that object List does not have an apply method.

I'm guessing that the presentation compiler sometimes uses scala-library.min and sometimes the full scala library or something like that? Seeing the same problem?

This seems to be #23 all over again.
I'm an Android n00b and have created a HelloWorld project and followed the instructions for getting Scala support into my project.  As in #23, upon running, the ScalaObject class cannot be found by the classloader.  I'm not sure if this is a bug report or a clueless n00b report, but here's the evidence that I have:

Proguard config file:
$ cat proguard_cache/proguard_processed.conf 
-injars "/home/eric/adt-bundle-linux-x86/eclipse/configuration/org.eclipse.osgi/bundles/347/1/.cp/lib/scala-library.jar"(!META-INF/MANIFEST.MF)
-injars "/home/eric/adt-bundle-linux-x86/eclipse/configuration/org.eclipse.osgi/bundles/347/1/.cp/lib/scala-swing.jar"(!META-INF/MANIFEST.MF)
-outjars "/home/eric/workspace/HelloWorld/proguard_cache/jartender_cache_7200869458962116516.jar"
-injars "/home/eric/workspace/HelloWorld/bin/classes"
-libraryjars "/home/eric/adt-bundle-linux-x86/sdk/platforms/android-17/android.jar"
-libraryjars "/home/eric/workspace/HelloWorld/libs/android-support-v4.jar"
-dontwarn
-dontoptimize
-dontobfuscate
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-ignorewarnings
-forceprocessing
-keep class com.ultracode.HelloWorld.R {*;}
-keep class com.ultracode.HelloWorld.R$menu {*;}
-keep class com.ultracode.HelloWorld.R$attr {*;}
-keep class com.ultracode.HelloWorld.R$id {*;}
-keep class com.ultracode.HelloWorld.R$string {*;}
-keep class com.ultracode.HelloWorld.BuildConfig {*;}
-keep class com.ultracode.HelloWorld.ScalaMainActivity {*;}
-keep class com.ultracode.HelloWorld.R$drawable {*;}
-keep class com.ultracode.HelloWorld.R$layout {*;}
-keep class com.ultracode.HelloWorld.R$style {*;}
=====

Running Proguard outside of Eclipse:
$ java -jar /home/eric/adt-bundle-linux-x86/sdk/tools/proguard/lib/proguard.jar @proguard_cache/proguard_processed.conf >/tmp/proguard.out

$ more /tmp/proguard.out 
ProGuard, version 4.7
Reading program jar [/home/eric/adt-bundle-linux-x86/eclipse/configuration/org.eclipse.osgi/bundles/347/1/.cp/lib/scal
a-library.jar] (filtered)
Reading program jar [/home/eric/adt-bundle-linux-x86/eclipse/configuration/org.eclipse.osgi/bundles/347/1/.cp/lib/scal
a-swing.jar] (filtered)
Reading program directory [/home/eric/workspace/HelloWorld/bin/classes]
Reading library jar [/home/eric/adt-bundle-linux-x86/sdk/platforms/android-17/android.jar]
Reading library jar [/home/eric/workspace/HelloWorld/libs/android-support-v4.jar]
Note: scala.xml.include.sax.Main$$anonfun$3 calls '(org.xml.sax.EntityResolver)Class.forName(variable).newInstance()'
Note: scala.Enumeration accesses a field 'MODULE$' dynamically
      Maybe this is program field 'scala.Array$ { scala.Array$ MODULE$; }'
      Maybe this is program field 'scala.Boolean$ { scala.Boolean$ MODULE$; }'
      Maybe this is program field 'scala.Byte$ { scala.Byte$ MODULE$; }'
      Maybe this is program field 'scala.Cell$ { scala.Cell$ MODULE$; }'
      Maybe this is program field 'scala.Char$ { scala.Char$ MODULE$; }'
[billions of entries like the above, then]
Note: there were 1 class casts of dynamically created class instances.
      You might consider explicitly keeping the mentioned classes and/or
      their implementations (using '-keep').
Note: there were 1 accesses to class members by means of introspection.
      You should consider explicitly keeping the mentioned class members
      (using '-keep' or '-keepclassmembers').
Note: You're ignoring all warnings!
Preparing output jar [/home/eric/workspace/HelloWorld/proguard_cache/jartender_cache_7200869458962116516.jar]
  Copying resources from program jar [/home/eric/adt-bundle-linux-x86/eclipse/configuration/org.eclipse.osgi/bundles/3
47/1/.cp/lib/scala-library.jar] (filtered)
  Copying resources from program jar [/home/eric/adt-bundle-linux-x86/eclipse/configuration/org.eclipse.osgi/bundles/3
47/1/.cp/lib/scala-swing.jar] (filtered)
==========

After a build from eclipse:
$ ls -l libs
total 400
-rw-r--r-- 1 eric eric 385685 Jan 22 18:44 android-support-v4.jar
-rw-r--r-- 1 eric eric    285 Feb  5 14:39 scala_library.min.jar
==========

$ jar tf ./proguard_cache/jartender_cache_7200869458962116516.jar 
library.properties
scala/swing/test/images/banana.jpg
scala/swing/test/images/margarita1.jpg
scala/swing/test/images/margarita2.jpg
scala/swing/test/images/rose.jpg
==========

Finally, the logcat output when trying to run the app:
02-05 22:50:37.227: W/Trace(602): Unexpected value from nativeGetEnabledTags: 0
02-05 22:50:37.227: I/dalvikvm(602): Failed resolving Lcom/ultracode/HelloWorld/ScalaMainActivity; interface 540 'Lscala/ScalaObject;'
02-05 22:50:37.247: W/dalvikvm(602): Link of class 'Lcom/ultracode/HelloWorld/ScalaMainActivity;' failed
02-05 22:50:37.267: D/AndroidRuntime(602): Shutting down VM
02-05 22:50:37.327: E/AndroidRuntime(602): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.ultracode.HelloWorld/com.ultracode.HelloWorld.ScalaMainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.ultracode.HelloWorld.ScalaMainActivity" on path: /data/app/com.ultracode.HelloWorld-2.apk
===========

The "ScalaMainActivity" class file IS being generated.  Am I doing something wrong, or does there appear to be a problem here?

When compiling the basic scala-android project (as shown on the Scala IDE tutorial) Eclipse throws the following error

Errors running builder 'Android Proguard Scala Builder' on project 'HelloScala'.

Eclipse stack trace:

org.jruby.exceptions.RaiseException: (TypeError) can't convert nil into String at org.jruby.RubyFile.unlink(org/jruby/RubyFile.java:1785) at ProguardCacheRuby.install_proguard_output(classpath:/./proguard_cache.rb:61) at ProguardCacheJavaInterop.install_proguard_output(src/main/jruby/proguard_cache_java_interop.rb:20)

• Added Scala nature and Android ProGuard nature
• Im still able to run the app, but it doesn't found the main activity class

After upgrading my eclipse environment to use Scala IDE 3.0.4 build against scala 2.11 I'm no longer able to install AndroidProguardScala via the update site. It just tells me that: 'Software being installed: Android/Proguard/Scala Feature 0.0.50 (com.restphone.androidproguardscala.feature.feature.group 0.0.50) Missing requirement: AndroidProguardScala - a builder for speeding up builds of Scala for Android 0.0.50 (com.restphone.androidproguardscala 0.0.50) requires 'bundle org.scala-ide.scala.library 0.0.0' but it could not be found Cannot satisfy dependency: From: Android/Proguard/Scala Feature 0.0.50 (com.restphone.androidproguardscala.feature.feature.group 0.0.50) To: com.restphone.androidproguardscala [0.0.50]'

I'm aware that there is a lot of discussion if Android developers should adopt scala 2.11, but nonetheless it would be nice to have at least the possibility to try ;-)

Best regards, Andreas

Is AndroidProguardScala known to work with Android test projects?

Because I can't get it to work. :) When I try to launch the tests, the launch fails and logcat has:

E/AndroidRuntime(1470): java.lang.NoClassDefFoundError: scala/reflect/ScalaSignature

I do get a scala_library.min.jar, but it doesn't contain any classes. just library.properties.

If you care to look, I've created a git repo:

https://github.com/jimfulton/AndroidProguardScala-test-projects-example

with 3 projects:

hi A scala android hello world app

hiTests An attempt at an android test project written in scala, which doesn't launch

hiTestsJava An android test project written in Java that launches and runs just fine.

Am I doing something wrong?

If I'm not mistaken, the Android build should use libs/scala_library.min.jar, right?

In my case, Eclipse detects it, AndroidProguardScala generates it correctly (as far as I could tell), but the Dex compiler doesn't pick it up. I tried cleaning the project and restarting Eclipse multiple times ; sometimes (rarely) it worked, but I wasn't able to identify what I did exactly.

Any idea about what I am doing wrong?

I followed the Instructions in the README and successfully installed the plugin. Then, I created a new Android Project 'ScalaTest' and successfully added the AndroidProguardScala Nature to it.

The README reads: "Choose which jars in the classpath will be included in the minified jar. By default, the standard scala libraries will be included." But these libraries are not added to the Android Project:

Moreover I cannot add the Scala Nature to it (no menu entry). Which may be another problem.

The result is that I cannot add Scala classes to the project. The "Create a new Scala Class" wizard reports that "ScalaTest is not a Scala project" and refuses to add the class:

The scala_library.min.jar created by ProGuard breaks the Content Assist. It only shows templates in the menu.

Changing the order of the libraries on the build path seems to solve this issue.

I realize that this is a bit OT, but can you give any tips on how to apply the proguard transformation from ant?

Developing in Eclipse is great, but I also need to be able to do CI, and afaict, I need the command-line tools to do that, thus ant.

You say: "The plugin is intended for development-time only. You should continue to use Proguard with your own configuration for release builds."

Can you give any hints what our own configuration should be?

I've tried (as a test) just copying the scala library to my project libs directory and enabling proguard. I get lots of unresolved references. I then tried copying the rest of the scala libraries and got lots more. So, obviously, I'm doing this wrong.

Bumps junit from 4.10 to 4.13.1.

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

Using Eclipse, I was just trying to augment an existing purely Java Android app by adding a simple Scala class that would provide some functionality.

1. I clicked on the project to "Add AndroidProguardScala Nature" .
2. Immediately afterwards, I wanted to issue a "clean" to make sure I was starting at a good state and I received this error

Errors occurred during the build. Errors running builder 'Android Proguard Scala Builder' on project 'com.SerialTest.SerialTestActivity'. java.lang.NullPointerException

I've tried this with several programs that I had written as well as some samples from the book Android Wireless Application Development Volume I

The new scala debugger helps to go through the code very easily: http://scala-ide.org/docs/current-user-doc/features/scaladebugger/index.html

Could you activate it for your awesome plug-in AndroidProguardScala ? It currently works only for scala-only projects, so I guess it needs to be manually added.

Here is how they add their new debugger: https://github.com/scala-ide/scala-ide/blob/eb61d7f4130cd1e0da95b6094abd70b68323f5dd/org.scala-ide.sdt.debug/plugin.xml

Thank you for your amazing work.

I get a java.lang.NoClassDefFoundError: scala.collection.mutable.StringBuilder

based on a straightforward ....

val textViewCounter = findViewById(R.id.textViewCounter).asInstanceOf[TextView] textViewCounter.setText("This app has been started " + counter + " times.");

I am running Eclipse Juno + Scala 2.10.1 + Android 4.1.2 + AndroidProguardScala 47.2...

I have tried adding the following to proguard_cache_conf/proguard_additions.conf...

-keep class scala.collection.mutable.StringBuilder { *; }

Any ideas?

Warning: can't write resource [reflect.properties](Duplicate zip entry [scala-reflect-2.10.1.jar:reflect.properties]) Error: Can't write [C:\Users\james\workspace\AkkaProducerConsumerBenchmarks\proguard_cache\jartender_cache_3033257530503124243.jar](Can't read [C:Usersjames.ivy2cacheorg.scala-langscala-reflectjarsscala-reflect-2.10.1.jar%28;;;;!META-INF/MANIFEST.MF%29] %28Duplicate zip entry [scala-reflect-2.10.1.jar:scala/reflect/api/Annotations$ArrayArgumentExtractor.class]%29)