[primaeval]

 

 Did you set the Output folder for recordings and is it writable by Kodi?
Are there any error messages in the kodi.log?
Does the channel you try to record from play and is it an http:// link or a plugin:// link?
It won't record programs that have already started.  

 Oh, it did work! I didn't know that it won't record a program that has started, but I have noticed that it didn't stop recording even after I clicked "Don't Autoplay with", it only stopped when I played another channel, is that normal?

IPTV Recorder is a great add on, but wish if IPTV Simple Client recording function worked for Android, it's working great in Windows.

Again thanks for your patience and great work! 

 Recording in TVGF is fairly basic. I just adapted the original program notifications for recording.
You can only record a program in the future and not stop it prematurely.
Try turning the "Stop After Play" setting off. I think that kills all the ffmpeg processes.

@el_gonz87 has got a long way with IPTV Simple Client recording.
https://forum.kodi.tv/showthread.php?tid=326896
If he hasn't done it yet you should be able to build it for Android.

If you want the full set of recording rule options then IPTV Recorder is probably your best bet at the moment on Android.