TrueZip on Android, UnsupportedCharsetException: IBM437

Question

I'm trying to open zip file on Android 4.3 emulator using TrueZip 7.7.3

the line

TArchiveDetector ad  = new TArchiveDetector("myext", new ZipDriver(IOPoolLocator.SINGLETON));

throws java.lang.ExceptionInInitializerError caused by java.nio.charset.UnsupportedCharsetException: IBM437 at java.nio.charset.Charset.forName(Charset.java:303) at de.schlichtherle.truezip.fs.archive.zip.ZipDriver.<clinit>(ZipDriver.java:75) ... 16 more

Is it possible to use TrueZip on Android? I need it because java.util.ZipFile on Android is old and cannot handle more than 65536 files in zip archive.

Answer 1

TrueZIP on the Android platform is generally unsupported because the platform misses or used to miss some essential classes, e.g. java.util.ServiceLoader. Regarding the missing IBM437 character set: A provider is actually bundled into TrueZIP, but the ServiceLoader class is required to find and load it. You may try to use the JarDriver instead (which uses UTF-8 instead of IBM437), but I'm afraid you will only run into similar issues because TrueZIP depends a lot on the ServiceLoader class in order to load the kernel, the drivers, the extensions etc.