Add more options to compression.

I have been using your file manages for some time and I am quite happy and I like the progress it is making, good job!

However I only find one thing I do not like and it is the file compression, I think it can be a very interesting improvement to add more compression options like having 7z or tar and more compression algorithms like LZMA, LZMA2, bzip2 or gzip and having the ability to see inside them and exract individual files. I think a good way to implement it would be simply making a menu for selecting the options you want when compressing.

I think this feature would finally make a great replacement for proprietary apps like ZArchiver and be the best open-source archive manager for Android.

Thanks in advance.

EDIT: The most convenient thing would be a p7zip implementation.

Start by reviewing the existing compression and archive-handling entry points in the Android file manager, then assess how a p7zip implementation could provide 7z, tar, LZMA, LZMA2, bzip2, and gzip options. The work would be complete when users can select compression options and browse archives or extract individual files.