Develop Reference

Cannot solve dynamic reference to constructor

I have been trying to fix this problem for a week now. I create a shadowJar (uber jar) and it starts fine. When I run obfuscation, I get an error on startup:
Caused by: java.lang.UnsatisfiedLinkError: Can't obtain peer field ID for class com.sun.jna.Pointer
I have been using Proguard to run obfuscation and I always get this after the process
"Note: com.sun.jna.Structure accesses a constructor '(com.sun.jna.Pointer)' dynamically"
Here is a snippet of my .pro file:
-dontshrink
-dontoptimize
-keepattributes Exceptions,InnerClasses,Signature,Deprecated,SourceFile,LineNumberTable,LocalVariable*Table,*Annotation*,Synthetic,EnclosingMethod
-keep class com.sun.jna.** {
<fields>;
<methods>;
}
-keep,allowshrinking class com.sun.jna.** {
<fields>;
<methods>;
}
Am I doing it wrong or missing something important? I am assuming the message after processing is related to the start-up error I have from the obfuscated jar.

How to configure 'build_common.xml' Ant file for Proguard and ORMLite in java application

I have a Java application running on PC (Windows).
I use Netbeans.
I use Proguard to obfuscate the code and I configure the obfuscation by the build_common.xml (Ant) file; therefore the ProGuard configuration options are given by XML configuration tags.
I'm not expert at all of Xml, Proguard, I just copied and adapted some pieces of codes got in the web for my purposes and it worked.
Recently I introduced in my code ORMLite. When I run from IDE (so without obfuscation) my code works, but when I build with obfuscation it doesn't work.
Inside build_common.xml I excluded the "class com.j256.**" library, by:
<keep name="com.**" > <method name="*" /> <field name="*" /> </keep>
but it isn't enought because probably ORMLite uses special annotations.
I found out some post, suggesting to use for example:
-keepattributes *DatabaseField*
-keepattributes *DatabaseTable*
-keepattributes *SerializedName*
-keep class com.j256.**
-keepclassmembers class com.j256.** { *; }
-keep enum com.j256.**
-keepclassmembers enum com.j256.** { *; }
-keep interface com.j256.**
-keepclassmembers interface com.j256.** { *; }
-dontwarn com.j256.ormlite.logger.**
-dontwarn com.j256.ormlite.misc.**
but I don't know how to write those options in XML; I did some trying but it didn't work.
Can anybody help? Moreover on how to exclude from obfuscation ORMLite annotations.

Founded out the solution:
simply added inside the proguard tags of 'build_common.xml' file the line:
-keepattributes *Annotation*
`the rest of the lines mensioned in my question seems unusefull

ProGuard SimException

I'm trying to get ProGuard to work, after roughly 4 hours of randomly trying options to try and get this amazing software to work.
My project is using LibGDX and KryoNet. This is my current ProGuard configuration:
-verbose
-dontobfuscate
-dontwarn android.support.**
-dontwarn com.badlogic.gdx.backends.android.AndroidFragmentApplication
-dontwarn com.badlogic.gdx.utils.GdxBuild
-dontwarn com.badlogic.gdx.jnigen.BuildTarget*
-dontwarn com.badlogic.gdx.graphics.g2d.freetype.FreetypeBuild
-keepclassmembers class com.badlogic.gdx.backends.android.AndroidInput* {
<init>(com.badlogic.gdx.Application, android.content.Context, java.lang.Object, com.badlogic.gdx.backends.android.AndroidApplicationConfiguration);
}
# Kryo
-dontwarn sun.reflect.**
-dontwarn java.beans.**
-dontwarn sun.nio.ch.**
-dontwarn sun.misc.**
-keep class com.esotericsoftware.kryo.** {*;}
-keep class com.esotericsoftware.** {*;}
-keep class java.beans.** { *; }
-keep class sun.reflect.** { *; }
-keep class sun.nio.ch.** { *; }
This does not compile. It throws multiple of the following errors: Uncaught translation error: com.android.dx.cf.code.SimException: local variable type mismatch: attempt to set or access a value of type float using a local variable of type int. This is symptomatic of .class transformation tools that ignore local variable information.
I found some information about this error: Compile with Proguard gives SimException: "local variable type mismatch".
The solution given was to edit some main-rules.xml file from ANT, but I'm using Gradle. A comment was posted with a fix for Gradle : to add project.tasks.withType(com.android.build.gradle.tasks.Dex) { additionalParameters=['--no-locals'] }. But apparently the Dex class is removed, so this no longer works.
I read this is a bug in ProGuard, and that obfuscating should fix it. But when I remove the -dontobfuscate line, my app does not start anymore: java.lang.UnsatisfiedLinkError: No implementation found for void com.a.a.c.a.k.g() (tried Java_com_a_a_c_a_k_g and Java_com_a_a_c_a_k_g__).
Does anyone know how to work around these issues?

The problem might be related to a specific optimization of ProGuard.
You can disable it like that:
-optimizations !code/allocation/variable
Furthermore you can also remove the LocalVariableTable and LocalVariableTypeTable attributes which do not seem to be updated properly (and are not needed in an application anymore). For this you would need to enable obfuscation though and then use something like:
-keepattributes !LocalVariable*,**
This rule would keep all attributes but the LocalVariable related ones.
The obfuscation problem with libGDX might be solved by this rule:
# Keep names - Native method names. Keep all native class/method names.
-keepclasseswithmembers,includedescriptorclasses class * {
native <methods>;
}

How to make ProGuard work in a simple way?

I tested ProGuard on a simple application. It works very well. However, when i tried to use it on something more complex, it thows all types of warnings and error like one class depends on other or a class tries to use reflection etc.
This is the configuration
-injars Test.jar
-outjars Test2.jar
-libraryjars <java.home>/lib/rt.jar
-libraryjars <java.home>/lib/jce.jar
-printmapping myapplication.map
-keep class com.teradata.** {*;}
-keep class org.quartz.** {*;}
-keep class org.terracotta.** {*;}
-keep class com.sun.** {*;}
-keep class javax.** {*;}
-keep class org.apache.** {*;}
-keep class org.slf4j.** {*;}
-keep class com.** {*;}
-keep public class com.test.Main {
public static void main(java.lang.String[]);
}
Is there any simple way to make it work. If something should be in -keep, can it automatically do so? Process as much as it can, and leave the rest .
I also tried the gui version . But I couldn't figure out how to -keep the jars.
Also it's too verbose even without the verbose keyword . I can't get to the root of the problem because of enormous number of the duplicate error message like Maybe blah blah and then the same thing again and again .
Is there any simple way to just make it work ?

If you do not want to be bothered by looking at the warnings and fix them appropriately (or use -dontwarn directives to ignore harmless ones), you can use the -ignorewarnings directive, which will instruct ProGuard to keep processing your application even if there are some warnings remaining.

EventBus onEvent() not found after deployment

I am developing in Java using Eclipse Luna SR1. The app was tested successfully on a physical device. However, after I deployed it, I received the ClassNotFoundException claiming there's no onEvent() method in my activity...but it's there.
Did anyone encounter the same problem?

When using proguard you need to add this to proguard.config
## GreenRobot EventBus specific rules ##
# https://github.com/greenrobot/EventBus/blob/master/HOWTO.md#proguard-configuration
-keepclassmembers class ** {
public void onEvent*(***);
}
# Only required if you use AsyncExecutor
-keepclassmembers class * extends de.greenrobot.event.util.ThrowableFailureEvent {
public <init>(java.lang.Throwable);
}
# Don't warn for missing support classes
-dontwarn de.greenrobot.event.util.*$Support
-dontwarn de.greenrobot.event.util.*$SupportManagerFragment
official documentation https://github.com/greenrobot/EventBus/blob/master/HOWTO.md#proguard-configuration