Android Tutorial

Android Tutorial 417

This is displayed to the user as a small number over the icon. This

is only displayed in the status bar and not in the expanded status

bar, although an application could update the text to also display

this information. Figure shows what this might look like in the

status bar.

Status bar notification with the count of “4” showing over

the icon.

Clearing Notifications

When a user clicks on the notification, the

Intent assigned is triggered. At some

point after this, the application might

want to clear the notification from the

system notifications queue. This is done

through a call to the cancel() method of

the NotificationManager object. For

instance, the notification we created

earlier could be canceled with the

following call:

notifier.cancel(NOTIFY_1);

This cancels the notification that has the same identifier. However,

if the application doesn’t care what the user does after clicking on

the notification, there is an easier way to cancel notifications.

Simply set a flag to do so, as shown here:

notify.flags |= Notification.FLAG_AUTO_CANCEL;