How does android get the number of unread messages?

When your mobile phone receives new information, it will prompt you in the notification bar at the top of the screen. Drop down the notification bar to view this unread short message (if the notification bar does not display the new information icon, please operate: Information-Menu Key-Settings-Notification-Check).

When there are unread messages on the mobile phone, the number of unread messages will also be displayed on the information icon. You can also click on the information on the standby page to view unread messages.

If you click a short message conversation, you can view the short message in full screen.