Add FastOutExtraSlowInInterpolator to Jetpack [225010352]

Fixed

Feature Request

Status Update

No update yet.

Description

ne...@google.com

created issue #1

Mar 16, 2022 07:32PM

All but one of the AOSP interpolators [1] have Java counterparts included in androidx (core-animation [2] / interpolator [3]). Specifically, the fast_out_extra_slow_in interpolator does not have a Java counterpart available in androidx.

Upcoming Material motion guidelines [4] recommend using this interpolator, so I'd like to request that this interpolator be added to androidx. For context, the AOSP interpolator is available on API 28+, but the Chrome for Android team currently supports 23+.

Our current workaround is to duplicate the fast_out_extra_slow_in in our codebase and use it as a custom interpolator.

[1]

https://developer.android.com/reference/android/R.interpolator
[2]

https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:core/core-animation/src/main/java/androidx/core/animation/
[3]

https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:interpolator/interpolator/src/main/java/androidx/interpolator/view/animation/
[4]

https://carbon.googleplex.com/material-motion/pages/easing-and-duration/overview/98c6a4f5-3d60-4882-adcb-94bae6effaa2#41ae19ad-75ae-4d39-b67d-146bd4971a9c

Comments

al...@google.com <al...@google.com> Mar 21, 2022 08:15PM

Assigned to al...@google.com.

al...@google.com <al...@google.com> #2Mar 24, 2022 04:34PM

Work summary:

Create a lookup table for the bezier curve defined by fast_out_extra_slow_in.xml in the platform SDK
Create a FastOutExtraSlowInInterpolator class in the androidx.interpolator library, similar to the existing FastOutLinearInInterpolator class
Run a release of androidx.interpolator

ap...@google.com <ap...@google.com> #3Apr 13, 2022 04:37PM

Project: platform/frameworks/support
Branch: androidx-main

commit ce11d74218c74436ba4e793a5c0575a285b40570
Author: Julia McClellan <juliamcclellan@google.com>
Date: Wed Apr 06 11:25:45 2022

Create FastOutExtraSlowInInterpolator

Test: manually verified that values are the same as what PathInterpolator produces
Relnote: Added FastOutExtraSlowInInterpolator to the interpolator library
Bug: 225010352

Change-Id: I565501d5603798d6bb939047de4f2a56093647da

M interpolator/interpolator/api/public_plus_experimental_current.txt
M interpolator/interpolator/api/restricted_current.txt
A interpolator/interpolator/src/main/java/androidx/interpolator/view/animation/FastOutExtraSlowInInterpolator.java
M interpolator/interpolator/api/current.txt

https://android-review.googlesource.com/2056344

al...@google.com <al...@google.com> Apr 13, 2022 06:30PM

Marked as fixed, reassigned to ju...@google.com.

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