User notification for users in different apps

0

I was doing some studies related to the development of Android, and I came across the following question. How can I send a notification from one user in one application to another in another application.

Example:

Does a user in a shopping application make a purchase order, such as sending the notification of this order to the merchant using the made-for-sale application? Which tools should I use?

    
asked by anonymous 19.02.2018 / 17:10

0 answers