Action:
android.content.Intent.ACTION_VIEW
Input:
Uri: x11://localhost:6000 where usually localhost is the bind address and 6000 means a port number ... An uri of x11://localhost:6100 would usually mean that the environment variable DISPLAY for the application would have been set to DISPLAY=localhost:100.
Output:
An X server would be launched allowing other applications to use X11 protocol.
This intention is used to allow X11 applications to be able to launch an X server as a prerrequisite for other applications.