Android-AnimatorSet，Object Animator-反弹动画链是否融合在一起？ [英] Android - AnimatorSet, Object Animator - Bounce animation chain is amalgamating?

问题描述

我对Android中的ObjectAnimator有疑问。我正在尝试对弹跳效果进行建模，即视图以相同的数量'n'向上滑动（Y值减小）然后向下滑动，然后视图又一次向上和向下滑动但这次为'n / 2'（所以一半的距离）。

I have a question concerning ObjectAnimator in Android. I am trying to model a Bounce effect whereby the View slides up (decreasing Y value) and back down after by the same amount 'n', followed by the View sliding up and down again but this time by 'n/2' (so half the distance).

跳动较大，然后跳动变浅，即Mac图标在需要您注意时在托盘中执行的操作。

So a bigger bounce, followed by a shallower bounce - i.e., the kinda thing a Mac icon does in the tray when it wants your attention.

这是到目前为止我尝试过的（假设 v 是视图 ）：

Here is what I've tried so far (assume v is a View):

float y = v.getTranslationY(),distance = 20F;

                AnimatorSet s = new AnimatorSet();
                s.play(ObjectAnimator.ofFloat(v, "translationY", y- distance).setDuration(500))
                .before(ObjectAnimator.ofFloat(v, "translationY", y).setDuration(500))
                .before(ObjectAnimator.ofFloat(v, "translationY", y- (distance/2)).setDuration(500))
                .before(ObjectAnimator.ofFloat(v, "translationY", y).setDuration(500));
                s.start();

忽略代码质量，这是一个POC！我希望这能起作用，但是尽管使用了 .before（）。

Ignore the code quality, it's a POC! I was hoping this would work, but it seems to only 'bounce' once as if its combined the animations despite the use of .before().

您能告诉我如何创建复杂的AnimatorSet链，因为我似乎缺少了一些东西，所以它们不会融合在一起？

Could you please show me how I can create complex AnimatorSet chains that do not amalgamate in to one, as I seem to be missing something?

奖励：要获得加分，我如何设置AnimatorSet的重复次数？

BONUS: For extra points, how can I set the repeat of an AnimatorSet?

非常感谢！

推荐答案

确定，所以我最终找到了一种相当整齐的方式来实现连续动画，方法是忽略流畅的生成器，而只需使用 playSequentially（） 方法，使得：

OK so I eventually found a fairly neat way to achieve sequential animation by ignoring the fluent builder, and just using the playSequentially() method such that:

AnimatorSet as = new AnimatorSet();
as.playSequentially(ObjectAnimator.ofFloat(...), // anim 1
                    ObjectAnimator.ofFloat(...), // anim 2
                    ObjectAnimator.ofFloat(...), // anim 3
                    ObjectAnimator.ofFloat(...)); // anim 4
as.setDuration(600);
as.start();

除了在侦听器中涉及到回调onAnimationEnd的肮脏hack之外，仍然没有解决重复问题。必须是一种更简单的方法，以便也许有人在知道一个时就可以对其进行编辑。

Still haven't worked out repeating though, other than a dirty hack involving the callback onAnimationEnd in a listener. Must be a simpler way, so perhaps someone can edit this when they know of one.

无论如何，希望以上内容对某人有所帮助。

Anyway, hope the above helps someone.

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