h6ah4i/android-advancedrecyclerview

Group collapse animation

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#244 建立於 2016年5月11日

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 (3 留言) (0 反應) (0 負責人)Java (5,296 star) (879 fork)batch import
help wantedquestion

描述

I've been using a custom implementation of this library for a while (so just downloading the latest version would overwrite my customizations).

See the animated GIF below. When collapsing, the "Lab" group disappears and then shows up under "Exams" instead of smoothly moving up beneath it. This used to be a much smoother transition and I'm wondering if someone can help me figure out what's changed in recent Android updates and which classes from this library I need to update to correct this. I've already gone through and tried updating the animator classes, but to no avail. I'd appreciate any tips. Thanks.

Animation of behavior - GIF

貢獻者指南

技術棧
java
領域
mobile
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
half day
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
needs investigation
前置要求
Android RecyclerView animationsItemAnimator API
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
30
研究方向
Investigate the ItemAnimator and related animator classes in the library (e.g., `ExpandableItemAnimator` or `AdvancedItemAnimator`). Compare the current implementation with earlier versions to identify what changed in the animation behavior. The issue mentions a regression from a custom implementation; look at recent commits around the library's animation files. Reproduce the collapse animation and trace the animation sequence to find where the smooth transition is broken.