Android 9 Development Cookbook - Third Edition

How it works...

Since this recipe uses the same flashlight code as Lights, Action, and Sound - getting the user's attention!, we'll jump to the showNotification() method. Most notification builder calls are the same as in previous examples, but there are two significant differences:

.setVibrate() 
.setPriority(PRIORITY_MAX) 

Notifications will not be escalated to Heads-Up Notifications unless the priority is set to HIGH (or above) and uses either vibrate or sound. Note this from the Developer documentation at http://developer.android.com/reference/android/app/Notification.html#headsUpContentView: "At its discretion, the system UI may choose to show this as a heads-up notification."

We create a PendingIntent as we've done previously, but ...