unzip apk files
The simplest method is executing unzip command:
unzip xxx.apk -d xxx
A directory xxx will be generated to store unzipped files.
Actually, .apk files are same as .zip files. Execute command file XXX.apk to see that.
get readable text files from apk
If you want readable text files such as the manifest file, I would suggest you to use the apktool. We could install the apktool easily with Homebrew:
brew install apktool
then get the readable text files:
apktool d xxx.apk
after the previous command, a xxx directory contains readable text files and others would be there.
edit zip files
If you want to edit a zip file in place, the Keka might be a good option.