To install android-ndk, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install android-ndk
To see what files were installed by android-ndk, run:
port contents android-ndk
To later upgrade android-ndk, run:
sudo port selfupdate && sudo port upgrade android-ndk
Reporting an issue on MacPorts Trac
The MacPorts Project uses a system called Trac to file tickets to report bugs and enhancement requests.
Though anyone may search Trac for tickets, you must have a GitHub account in order to login to Trac to create tickets.