Reply From Notifications With Updated Gmail for Android
Those using the new Gmail app on a device running Android 4.1 Jelly Bean and above will now be able to reply to and archive messages directly from notifications with a single tap, Google software engineer Andy Huang wrote in a blog post Monday.
Gmail for Android updates to enable replies from notifications
Gmail for Android update adds reply and archive from notifications
Gmail For Android Gets One-Tap Reply, Archiving From Notifications