Open password protected ZIP in Android?

Question

is there an library or a simple way how to open a password protected ZIP archive in Android? I know there are different types of ZIP encryption. I would like to open the most simple one, create in Unix with the zip -e command. The same file can be opened in Windows (which will ask for password). That should be the standard ZIP 2.0 encryption? How can I open it?

I search for all alternatives but I didn't find any final solution.

Answer 1

I found a .jar library that works on Android and can decompress and decrypt ZIP 2.0 files. http://www.lingala.net/zip4j/download.php

It worked for me (encrypted ZIP created in Ubuntu and decrypted in Android).

There might be a way to get it done without any library as described here: Implementation of ZipCrypto / Zip 2.0 encryption in java, but I was not able to get this code to work.

Answer 2

Check out http://code.google.com/p/winzipaes/

And there are several questions here tagged in Java dealing with Zip encryption you might look at.

Answer 3

You can also take a look at this library that can zip and unzip files with password easily:

Unzip:

ZipArchive zipArchive = new ZipArchive();
zipArchive.unzip(targetPath,destinationPath,password);

The documentation of this library is good enough, I just added a few examples from there. It's totally free and wrote specially for android.