Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Android Notification Channels: The Complicated ...
Search
Daniel Lew
September 05, 2017
Programming
1
320
Android Notification Channels: The Complicated Parts
Talk given to GDG Twin Cities.
Daniel Lew
September 05, 2017
Tweet
Share
More Decks by Daniel Lew
See All by Daniel Lew
Finding Meaningful, Mission-Driven Work
dlew
0
97
Things Maybe You Don't Know as a Newer Developer
dlew
1
94
Maintaining Software Correctness
dlew
4
930
Grokking Coroutines (MinneBar)
dlew
5
580
ClimateChangeTech.pdf
dlew
0
110
What Tech Can Do About Climate Change
dlew
0
580
Grokking Coroutines
dlew
5
1.1k
Automated Tests Aren't Enough
dlew
0
480
The Importance of Developer Communities
dlew
0
100
Other Decks in Programming
See All in Programming
『テスト書いた方が開発が早いじゃん』を解き明かす #phpcon_nagoya
o0h
PRO
8
2.4k
Datadog DBMでなにができる? JDDUG Meetup#7
nealle
0
130
Ruby on cygwin 2025-02
fd0
0
180
Formの複雑さに立ち向かう
bmthd
1
920
CI改善もDatadogとともに
taumu
0
190
Bedrock Agentsレスポンス解析によるAgentのOps
licux
3
910
ファインディLT_ポケモン対戦の定量的分析
fufufukakaka
0
910
なぜイベント駆動が必要なのか - CQRS/ESで解く複雑系システムの課題 -
j5ik2o
14
4.6k
Unity Android XR入門
sakutama_11
0
180
Jakarta EE meets AI
ivargrimstad
0
310
メンテが命: PHPフレームワークのコンテナ化とアップグレード戦略
shunta27
0
300
Domain-Driven Transformation
hschwentner
2
1.9k
Featured
See All Featured
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
28
9.3k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
49k
Measuring & Analyzing Core Web Vitals
bluesmoon
6
250
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
10
1.3k
Building a Modern Day E-commerce SEO Strategy
aleyda
38
7.1k
Navigating Team Friction
lara
183
15k
Facilitating Awesome Meetings
lara
52
6.2k
Large-scale JavaScript Application Architecture
addyosmani
511
110k
Six Lessons from altMBA
skipperchong
27
3.6k
KATA
mclloyd
29
14k
We Have a Design System, Now What?
morganepeng
51
7.4k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
49
2.3k
Transcript
Android Notification Channels: The Complicated Parts Dan Lew
Goal • Inform users • …Without annoying them
Noises • Sound
Noises • Sound • Vibration
Noises • Sound • Vibration • Light
Noises v2 • Metadata • Priority • Categories • People
• Do not Disturb interruptions • Hiding on lock screen
Android Oreo • Notification badges on launcher • Channels
None
Channels give users control
User Control App Control Importance Sound Vibration Light Show on
lock screen Show badges on launcher Bypass "Do Not Disturb” Channel Name Channel Description
targetSdkVersion 26 == Channels
None
Measure Twice, Cut Once
How Many Channels?
Trello Channel Overview Important Minor Temporary Mentions New Cards Attachments
Due Soon Cards Boards Comments Memberships
Notification Groups
Importance IMPORTANCE_HIGH Make sound and pop on screen IMPORTANCE_DEFAULT Make
sound IMPORTANCE_LOW No sound IMPORTANCE_NONE No sound or visual interruption
Custom Noise • Sound • Vibration • Light
Bells and Whistles • Badges on launcher • Bypass “do
not disturb”
Playing Dirty • Can delete & recreate channels • Users
will know • Will annoy users
val channel = NotificationChannel("news", “News", NotificationManager.IMPORTANCE_DEFAULT) channel.description = "News and
weather" channel.setShowBadge(false) val manager = context.getSystemService(NotificationManager::class.java) manager.createNotificationChannel(channel)
val channel = NotificationChannel("news", “News", NotificationManager.IMPORTANCE_DEFAULT) channel.description = "News and
weather" channel.setShowBadge(false) val manager = context.getSystemService(NotificationManager::class.java) manager.createNotificationChannel(channel)
val notification = NotificationCompat.Builder(context, "news") .setThis() .setThat() .etc() .build()
Timing • Create channels at… • Startup • First notification
• Create all channels at once • Channel creation is idempotent
Inform users… ...WITHOUT annoying them
How to annoy users without really trying
Too Many Sounds
Too Many Rows
Notification Bundles 1-3 notifications 4+ notifications
Notification Bundles Pros Cons Easy Works across channels Many noises
Only on Nougat+
Notification Groups 1 notification 2+ notifications
Notification Groups
Notification Groups Pros Cons Few notifications Few noises Extra work
Notification Groups val summaryNotification = NotificationCompat.Builder(context, "news") ... .setGroupSummary(true) .setGroup("myGroup")
.setGroupAlertBehavior(NotificationCompat.GROUP_ALERT_SUMMARY) .build() val childNotification = NotificationCompat.Builder(context, "news") ... .setGroupSummary(false) .setGroup("myGroup") .setGroupAlertBehavior(NotificationCompat.GROUP_ALERT_SUMMARY) .build()
Channels Break Groups • One group fails when channel disabled
• Group-per-channel creates too many rows • Group-per-channel creates too many noises
Channel Dilemma Bundling Groups Fewer rows Many noises Many rows
Fewer noises
Channel Solution • Channel should either… • Have a group
summary • Be IMPORTANCE_LOW or lower
Trello’s Setup Name Importance Summary Launcher Badge? Mentions HIGH Yes
Yes Due Soon DEFAULT Yes Yes Boards LOW No Yes Cards LOW No Yes Comments LOW No Yes Memberships LOW No Yes New Cards LOW No Yes Attachments MIN No No
Odds and Ends
Remove Notification Settings
Remove Notification Settings Intent
Listen to ACTION_LOCALE_CHANGED
Use setAlertOnlyOnce()
Summary • Embrace channels • Choose good defaults • Don’t
annoy users
Thank You! • danlew.net • @danlew42