How to make Proguard ignore external libraries?

I want to use Proguard mainly for obfuscation reasons.

My problem is that I have three libraries, Twitter4J and two signpost libraries. These libraries caused errors when I tried to create an signed APK. To get over this I put the following in the proguard.config file...

-dontwarn org.apache.commons.codec.binary.** 
-dontwarn org.slf4j.** 
-dontwarn com.sun.syndication.io.**
-dontwarn com.sun.syndication.feed.synd.*   

While this got rid of the errors in the console, when i loaded my signed APK onto my mobile phone it instantly crashed. The DDMS said this was due to a class not found in Twitter4J.

Getting rid of the "dontwarns" above did not help. Neither did adding dontshrink dontoptimise.

I would like Proguard to completely ignore the libraries (as they are open source anyway). Is this possible?

Solution 1:

Try this:

-keep class javax.** { *; }
-keep class org.** { *; }
-keep class twitter4j.** { *; }

Cf post from @CaspNZ: Android Proguard with external jar

Solution 2:

You should be able to add to the proguard.cfg the following lines to exclude all classes within a package (and subpackages)

-keep class org.apache.commons.codec.binary.**
-keep interface org.apache.commons.codec.binary.**
-keep enum org.apache.commons.codec.binary.**
-keep class org.slf4j.**
-keep interface org.slf4j.**
-keep enum org.slf4j.**
-keep class com.sun.syndication.io.**
-keep interface com.sun.syndication.io.**
-keep enum com.sun.syndication.io.**
-keep class com.sun.syndication.feed.synd.**
-keep interface com.sun.syndication.feed.synd.**
-keep enum com.sun.syndication.feed.synd.**