A basic port knocker client for Android. Similar to the other port knocker apps but with a nicer interface. Includes a widget and the ability to choose an application to launch after knocking. You can also import/export your list of hosts.
Please don't hesitate to contact me if you encounter any bugs, or even if you just have suggestions.
The code is open source and can be found at: https://github.com/xargsgrep/PortKnocker
Added ability to import/export hosts
Updated to material theme
Added slider for TCP connection timeout value
Ability to create 1x1 widgets
Removed hostname/IP validation since it was causing problems on a few devices
Fixed crashes in Jelly Bean when adding port by updating ActionBarSherlock to 4.1.0
Allow knocking to port 0