Start ftp server from adb shell

[desgua]

First thank you so much for the best file manager of Android!

Is there a way to start up the ftp server remotely through adb?
For example if I run "adb shell am start me.zhanghai.android.files/.ftpserver.FtpServerActivity" the ftp activity is bring to focus, but I can't find a way to turn it on.