"Prevent Running" hajacks several system api to prevent prevented apps from running when you don't use it.

How to use:
- install "Prevent Running", activate it in "Xposed Installer", reboot.
- open "Prevent Running", then add/remove application to/from prevent list.
- use android normally, press back or remove it from recent task to exit, and press home for pause
"Prevent Running" auto prevents new apps, and keep non-"service" processes. You can change this action in Advanced Settings.
Special Search:
'-3' for third party apps
'-a' for all apps (default show third party apps and gapps)
'-s' for system apps
'-e' for non-prevent apps
'-r' for running apps
'-g' for gapps, i.e. apps from google
'-sg' for system apps excluding gapps