I have the same problem as the original problem, it doesn’t work when I try to compile on Android.
First I had
“Can’t process class [java/text/CollationElementIterator.class] (Unsupported class version number [52.0] (maximum 51.0, Java 1.7)”. So I have upgraded proguard because apparently the previous version couldn’t be used with java 1.8, and now I have the original error:
[proguard] Note: there were 8 references to unknown classes. [proguard] You should check your configuration for typos. [proguard] (http://proguard.sourceforge.net/manual/troubleshooting.html#unknownclass) [proguard] Note: there were 42 unkept descriptor classes in kept class members. [proguard] You should consider explicitly keeping the mentioned classes [proguard] (using '-keep'). [proguard] (http://proguard.sourceforge.net/manual/troubleshooting.html#descriptorclass) [proguard] Note: there were 2 unresolved dynamic references to classes or interfaces. [proguard] You should check if you need to specify additional program jars. [proguard] (http://proguard.sourceforge.net/manual/troubleshooting.html#dynamicalclass) [proguard] Warning: there were 62 unresolved references to classes or interfaces. [proguard] You may need to add missing library jars or update their versions. [proguard] If your code works fine without the missing classes, you can suppress [proguard] the warnings with '-dontwarn' options. [proguard] (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)
BUILD FAILED C:\ProgrammePerso\Programmation\AndroidSDK\tools\ant\build.xml:597: The following error occurred while executing this line: C:\ProgrammePerso\Programmation\AndroidSDK\tools\ant\build.xml:871: Please correct the above warnings first.