implement MPRIS
Feature description If a program uses MPRIS it should come up as a media player in the notification shade so it can be paused or played etc like such

This would be much more convenient than having to unlock my phone and then pausing the music or skipping etc
Reference implementation https://specifications.freedesktop.org/mpris-spec/latest/
Have you checked if the feature is accessible through the Android API? Yes https://developer.android.com/guide/topics/media/media-controls Do you know of other open-source apps that has a similar feature as the one you want? (Provide links) https://github.com/RetroMusicPlayer/RetroMusicPlayer
It doesn't have thumbnails or time control, but here's a (hacky) script I made that lets you control an MPRIS app from a termux-api notification:
#!/bin/bash
# get dbus-launch env variables
dbvars=$(dbus-launch)
echo using dbus-launch output: $dbvars
makecmd() (
echo -n export $dbvars\; dbus-send --print-reply --dest=
echo -n '$(dbus-send --session --dest=org.freedesktop.DBus --print-reply /org/freedesktop/DBus org.freedesktop.DBus.ListNames | fgrep org.mpris.MediaPlayer2. | head -1 | awk '"'"'{print $2}'"'"' | sed '"'"'s:"::g'"'"')'
echo -n ' '
echo /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.$1
# termux-notification --type media
)
makenotif() (
playcmd=$(eval makecmd "Play")
ppcmd=$(eval makecmd "PlayPause")
prevcmd=$(eval makecmd "Previous")
nextcmd=$(eval makecmd "Next")
pausecmd=$(eval makecmd "Pause")
termux-notification --type media --id 1096 --priority max --title "termux-media-controls" --media-next "$nextcmd" --media-previous "$prevcmd" --media-pause "$ppcmd" --media-play "$ppcmd"
)
makenotif
echo "Subshell started. If you run an MPRIS-supporting player here, you'll be able to control it with the notification that was just shown"
export $dbvars
exec bash
Just save it somewhere and run it with no arguments.