Turn off notifications of an app programatically on Android

Question

I am developing a package manager application which shows checkboxes to turn off notifications from different applications installed on the Android device.

Answer 1

No, you cannot do that from your code. Perhaps on rooted devices you could do some magic, but that shall not really count for wider audience.

Answer 2

If you are App dev, you should manage that on server side, having a webservice (REST API) allowing the user to unsubscribe to the notifications. Then implement a Settings section in your App where user can uncheck a notification box and that call this service. Then, your server will not send the notification to this user.