Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Speaker Deck
PRO
Sign in
Sign up for free
Android Transitions
Bryan Herbst
February 06, 2016
Programming
0
190
Android Transitions
A tour of the Transitions framework in Android
Bryan Herbst
February 06, 2016
Tweet
Share
More Decks by Bryan Herbst
See All by Bryan Herbst
Semantics in Jetpack Compose
bherbst
0
3k
Kotlin Multiplatform
bherbst
0
350
Android App Architecture & Navigation
bherbst
0
1.6k
What's in the Android Toolbox
bherbst
0
270
Gradle Deep Dive
bherbst
2
1.3k
Actions with Google
bherbst
0
940
Databinding in Android
bherbst
0
220
Activities Vs. Fragments
bherbst
0
180
Android Transitions
bherbst
0
39
Other Decks in Programming
See All in Programming
Workshop on Jetpack compose
aldefy
0
140
T3 Stack and TypeScript ecosystem
quramy
3
760
OIDC仕様に準拠した Makuake ID連携基盤構築の裏側
ymtdzzz
0
560
OSC大阪 パスワード認証は人類には早すぎる ~ IDaaSを使ったソーシャルログインのすすめ ~
authyasan
7
1.4k
Jetpack Compose 完全に理解した
mkeeda
1
470
Hasura の Relationship と権限管理
karszawa
0
170
社会人 20 年目エンジニア、発信で技術学びなおしてる話
e99h2121
1
140
(新米)エンジニアリングマネージャーのしごと #RSGT2023
murabayashi
9
5.8k
domain層のモジュール化 / MoT TechTalk #15
mot_techtalk
0
110
レガシーフレームワークからの移行
ug
0
120
あなたと 「|」 したい・・・
track3jyo
PRO
2
1.1k
Enumを自動で網羅的にテストしてみた
estie
0
1.3k
Featured
See All Featured
Building a Scalable Design System with Sketch
lauravandoore
451
31k
What's in a price? How to price your products and services
michaelherold
233
9.7k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
239
19k
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
danielanewman
217
21k
Git: the NoSQL Database
bkeepers
PRO
419
60k
A Tale of Four Properties
chriscoyier
149
21k
Building Better People: How to give real-time feedback that sticks.
wjessup
346
17k
Three Pipe Problems
jasonvnalue
89
8.9k
YesSQL, Process and Tooling at Scale
rocio
159
12k
CSS Pre-Processors: Stylus, Less & Sass
bermonpainter
349
27k
The Pragmatic Product Professional
lauravandoore
21
3.4k
Why Our Code Smells
bkeepers
PRO
326
55k
Transcript
Transitions Bryan Herbst Android Engineer @ Target
Abrupt transitions are jarring
Smooth transitions provide continuity
Smooth transitions keep users engaged
Smooth transitions delight users
“In the world of material design, motion describes spatial relationships,
functionality, and intention with beauty and fluidity.”
Android Transitions Activity to Activity Fragment to Fragment
Scene to Scene (Views)
Hold on… Requires API 21
Hold on… Progressive enhancement, graceful degradation
Hold on… Support APIs offer default behavior
on older versions
Scenes Snapshot of a ViewGroup
Scene transition TransitionManager.beginDelayedTransition(rootView, new Fade()); button.setVisibility(View.INVISIBLE);
What is this black magic?
How it works 1. beginDelayedTransition() => Take a snapshot of
ViewGroup 2. Update Views 3. On next layout pass, Android takes another snapshot and creates animations
How it works 1. beginDelayedTransition() => Take a snapshot of
ViewGroup
How it works 1. beginDelayedTransition() => Take a snapshot of
ViewGroup 2. Update Views
Transition types Fade Explode Slide ChangeBounds
AutoTransition Fade Move Resize
What about property animation? ObjectAnimator.ofFloat(button, "alpha", 1f, 0f) .start();
What about property animation? button.animate().alpha(0f);
What about property animation? Fine if you want to think
about Views individually
What about property animation? Fine if you want to think
about Views individually Scenes allow us to think in groups
Activities With shared elements
Activity Transitions- setup Request Window.FEATURE_ACTIVITY_TRANSITIONS and Window.FEATURE_CONTENT_TRANSITIONS in both
Activities
Activity Transitions- setup Set a transition name on
the View in both Activities
What are these transition names? An ID for the transition
framework
Rule #1 All animating Views must have a transition name
Rule #2 All transition names must be unique within a
layout
Not a rule #1 Transition names don’t need to match
between layouts
Activity Transitions- setup Create a Bundle with ActivityOptions .makeSceneTransitionAnimation(activity,
sharedView, viewTransitionName) .toBundle();
Activity Transitions- setup Set your Transitions
Activity Transitions- setup Call startActivity(intent, transitionBundle);
Specifying shared elements makeSceneTransitionAnimation(activity, sharedView, transitionName); We specify pairs of
Views and transition names.
Specifying shared elements makeSceneTransitionAnimation(activity, sharedView, transitionName); We specify pairs of
Views and transition names. The sharedView is the original view in our current layout (the starting state)
Specifying shared elements makeSceneTransitionAnimation(activity, sharedView, transitionName); We specify pairs of
Views and transition names. The sharedView is the original view in our current layout (the starting state) The viewTransitionName is the name of the corresponding view in the new layout (the ending state)
Activity transitions magic Captures Views in first Activity, then second
Activity
Activity Transitions use the Window e.g. getWindow().setEnterTransition(new Fade());
Four transition types Enter Exit Reenter
Return
Four transition types Enter
Four transition types Exit
Four transition types Reenter
Four transition types Return
Four transition types x2 with Shared elements
Or not Stick with enter and return for shared elements
Shared exit and reenter Allow for animation before the transition
Sample Exit, shared enter, enter
Sample Reenter, shared return, return
A note on timing Because sometimes Views don’t exist right
away
Delayed transitions postponeEnterTransition(); startPostponedEnterTransition();
WARNING! Blocks transition
WARNING! Blocks transition
WARNING! Prefetch or find clever alternatives
Fragment example
Transition setup setExitTransition(new Fade()); Fade out non-shared elements
Transition setup newFrag.setSharedElementEnterTransition(new AutoTransition()); AutoTransition shared elements
Transition setup newFrag.setEnterTransition(new Fade()); Fade in non-shared elements
Making the transition fragmentManager.beginTransaction() .replace(R.id.container, newFrag) .addSharedElement(sharedView, "transitionName") .commit();
What about delayed transitions? Ugh. It isn’t good in
Fragments.
I didn’t want to animate that!
Targets- includes <fade> <targets> <target android:includeId="@id/fancyWidget"/> <target android:includeClass=“com.example.FancyWidget"/> <target android:includeName=“fancyWidget"/>
</targets> </fade>
Targets- excludes <fade> <targets> <target android:excludeId="@id/toolbar"/> <target android:excludeClass=“android.support.v7.widget.Toolbar"/> <target android:excludeName="toolbar"/>
</targets> </fade>
Support for <21
Support for <21 ActivityOptions => ActivityOptionsCompat .makeSceneTransitionAnimation(activity, view, name)
Support for <21 startActivity(intent, transitionBundle); Has existed since API 16!
Support for <21 Transition names android:transitionName="name" is ignored on
older versions ViewCompat.setTransitionName(view, “name);
Support for <21 Delaying transitions supportPostponeEnterTransition(); supportStartPostponedEnterTransition();
Support for <21 Specifying transitions The only place we need
a version check if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { getWindow().setEnterTransition(new Fade()); }