Android Studio - get error: java.util.zip.ZipException: only DEFLATED entries can have EXT descriptor

Question

I'm using Android Studio. I get this error at compilation:

java.util.zip.ZipException: only DEFLATED entries can have EXT descriptor

What does it mean.

Answer 1

One of the jar library files has been compressed in an unusual way.

Decompress the offending jar archives (you may have to rename to .jar to .zip before you can do this). Then recompress (I use 7-Zip archiver). Make sure you compress as zip, use compression level "store", and make sure the folder hierarchy remains the same. Remember to rename .zip back .jar.