Duplication of resources when using ProGuard and Android application

Question

I am trying to use ProGuard with one of my applications, say A. This application includes another application as a library (say, B). This is my proguard file.

-optimizationpasses 5 -dontusemixedcaseclassnames -dontskipnonpubliclibraryclasses -dontpreverify -verbose -optimizations !code/simplification/arithmetic,!field/*,!class/merging/* -keep public class * extends android.app.Activity -keep public class * extends android.app.Application -keep public class * extends android.app.Service -keep public class * extends android.content.BroadcastReceiver -keep public class * extends android.content.ContentProvider -keep public class * extends android.app.backup.BackupAgentHelper -keep public class * extends android.preference.Preference -keep public class com.android.vending.licensing.ILicensingService -keepclasseswithmembernames class * { native <methods>; } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet); } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet, int); } -keepclassmembers class * extends android.app.Activity { public void *(android.view.View); } -keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } -keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *; } -injars bin/classes -libraryjars lib 

When I first executed it, I got the following error:

  Proguard returned with error code 1. See console [2012-01-05 12:18:55 - BSabadellHC-Entrega] Note: there were 1059 duplicate class definitions. [2012-01-05 12:18:55 - BSabadellHC-Entrega] java.io.IOException: Can't write [/private/var/folders/19/321lw_654pzdqr8y34ysvsx80000gn/T/android_7971378611269030364.jar] (Can't read [/private/var/folders/19/321lw_654pzdqr8y34ysvsx80000gn/T/android_1457478862713006376.jar] (Duplicate zip entry [com/ideaknowing/labs/android/ikarengine/e.class == android_1457478862713006376.jar:com/ideaknowing/labs/android/ikarengine/R$anim.class])) 

The following parts are important to me:

• There are duplicate objects
• They must because of the R. files. On the console they say that there are duplicate resources in R $ (of course, since application A and library B include animations, layouts, etc.).

So, my idea was to exclude ProGuard R files, and for this I included the following lines of code:

 -keep public class net.firsrproject.android.R -keep public class com.ideaknowing.labs.android.ikarengine.R 

However, I still get the same error (so I think the files are still included in Proguard). Does anyone encounter deleting R files from ProGuard? Is there a hint or suggestion on how I can get rid of this error?

Thank you and welcome

Answer 1

Remove -injars bin/classes if you are using an Android library project since class files from the library are processed twice with this option (this worked for me in conjunction with this ).

If the above does not work, try the -dontnote .