The following is the first few sections of a chapter from The Busy Coder's Guide to Android Development, plus headings for the remaining major sections, to give you an idea about the content of the chapter.


Advanced Notifications

Notifications are those icons that appear in the status bar (or system bar on tablets), typically to alert the user of something that is going on in the background or has completed in the background. Many apps use them, to let the user know of new email messages, calendar reminders, and so on. Foreground services, such as music players, also use notifications, to tell the OS that they are part of the foreground user experience and to let the user rapidly return to the apps to turn the music off.

There are other tricks available with the Notification object beyond those originally discussed in an earlier chapter.

Prerequisites

Understanding this chapter requires that you have read the chapter on basic notifications and the section on RemoteViews in the chapter on basic app widgets.

Being a Good Citizen

Users have a love/hate relationship with apps that use notifications:

And so on.

Users’ discomfort with how apps handle notifications is why Android allows users to disable notifications.

Some of the items in this chapter, particularly those surrounding Android Wear, can help you improve user satisfaction with your notification strategy and tactics. Yet, at the same time, misuse of notifications is magnified by Wear, as Wear takes extra steps to get the user to pay attention to the notifications, with possibly disastrous results for your Play Store reviews.

In short, your objective with notifications is to be a good citizen:

Wear? There!

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Stacking Notifications

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Avoiding Wear

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Other Wear-Specific Notification Options

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Remote Input, On-Device

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Notification Groups

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Lockscreen Notifications

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Priority, and Heads-Up Notifications

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Full-Screen Notifications

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Progress Notifications

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Custom Views

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Life After Delete

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The Mysterious Case of the Missing Number

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Notifications and MessagingStyle

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Changes in API Level 23

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Sounds and Android 7.0

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