Remove all notifications from notification bar

Question

I want to remove all cancelable notifications from status bar. I know how to remove my app notifications I have seen this post before, butI want to remove other apps notificatio

Answer 1

To remove all notifications:

Kotlin

val NM = getSystemService(AppCompatActivity.NOTIFICATION_SERVICE) as NotificationManager
NM.cancelAll()

Java

NotificationManager NM = getSystemService(AppCompatActivity.NOTIFICATION_SERVICE) 
NM.cancelAll()