如何制作whatsapp类型的动画以从工具栏打开菜单(动作栏) [英] How to make whatsapp type of animation for opening the menu from toolbar(actionbar)

问题描述

1. 我最近更新了whatsapp，并注意到 单击工具栏上菜单项的动画.如何做到这一点 效果?
2. 是否有任何开源项目可以实现这一目标?
3. 我没有发布任何代码，因为.我不知道他们怎么样 它.

1. I recently updated whatsapp and noticed the animation for menu item clicked on toolbar. How to achieve this effect?
2. Are there any opensource projects to achieve this?
3. I have not posted any code because. I have no clue how they are doing it.

快照1:在单击菜单中的附件按钮之前

Snapshot-1 : Before clicking the attachment button in menu

快照2:单击菜单中的附件按钮

Snapshot-2 : After clicking the attachment button in menu

推荐答案

似乎他们在pre-L设备中移植"了棒棒糖动画.最简单的方法是使用 Igvalle的Material-Animation 之类的库(请参阅#4).它的minSdk为16，但我希望您可以将其减小14以下.

Seems like they "ported" lollipop animation in pre-L devices. The simplest way to do this is using libraries like Igvalle's Material-Animation (see #4). Its minSdk is 16, but I hope you can decrease it for 14 or below.

其他一些库: TransitionsBackport ， PreLollipopTransition ，过渡到处.

如果您创建此动画，请告诉我！

Please let me know if you create this animation!

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