What do I need to put in proguard.cfg to enable obfuscation?

I have the following code in my application's proguard.cfg (and yes, I also have proguard.config=proguard.cfg in build.properties):

-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>;
}

-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}

-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}

-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}

Yet, I was surprised to see an error report from the Android Market containing Unobf开发者_高级运维uscated symbols in the stack trace.

I know I uploaded an ProGuard exported version, so what did I miss?

If your stack trace included unobfuscated class names and methods specified in the --keep statements in your proguard.cfg, then the answer is in the body of your question...

Also note that due to the challenges posed by reflection, ProGuard automatically keeps the following:

• Class.forName("SomeClass")
• SomeClass.class
• SomeClass.class.getField("someField")
• SomeClass.class.getDeclaredField("someField")
• SomeClass.class.getMethod("someMethod", new Class[] {})
• SomeClass.class.getMethod("someMethod", new Class[] { A.class })
• SomeClass.class.getMethod("someMethod", new Class[] { A.class, B.class })
• SomeClass.class.getDeclaredMethod("someMethod", new Class[] {})
• SomeClass.class.getDeclaredMethod("someMethod", new Class[] { A.class })
• SomeClass.class.getDeclaredMethod("someMethod", new Class[] { A.class, B.class })
• AtomicIntegerFieldUpdater.newUpdater(SomeClass.class, "someField")
• AtomicLongFieldUpdater.newUpdater(SomeClass.class, "someField")
• AtomicReferenceFieldUpdater.newUpdater(SomeClass.class, SomeType.class, "someField")

Also note that if you somehow provide the file proguard/mapping.txt generated by ProGuard, the tool ReTrace can un-obfuscate everything.

In short, you don't need to put anything in proguard.cfg to enable obfuscation. The default options are sufficient. Theoretically, you may want to remove some of the default --keep options but ProGuard's documentation specifically states that:

For proper results, you should at least be somewhat familiar with the code that you are processing. Obfuscating code that performs a lot of reflection may require trial and error, especially without the necessary information about the internals of the code.