I can not find information on how to send push notifications in android studio from a "server" app to several app.
I talk to you quickly about this app, because it is a newspaper type where only one app sends the news every time the administrator needs it and this news reaches all those who have the app installed on their cel and everything is done but nobody it notifies users that they have new news, what I need is that every time the administrator sends a new news, a push notification arrives to all those who have an app, (ie a notification in the status bar or a chat head or a shtick on the app's icon with either sound light vibration etc etc or not).