播放时如何改变动画速度？

Question

我有 Animation，我需要在运行中更改持续时间或速度。如何做到这一点？

 Animation fadeIn = new AlphaAnimation(1, 0);
 fadeIn.setInterpolator(new AccelerateInterpolator()); //add this
 fadeIn.setDuration(800);
 fadeIn.setFillEnabled(true);
 fadeIn.setFillAfter(true);

 bt1.startAnimation(fadeIn);

Answer 1

您可以使用 Interpolators to have a variable speed during animation. Example can be found here.

Answer 2

我想你需要两个不同速度的动画。第一个完成后，第二个开始播放。

Animation anim1 = new AlphaAnimation (1, 0.5F);
anim1.setDuration (600); //The slow part.
//set other things for anim1

Animation anim2 = new AlphaAnimation (0.5F, 0);
anim2.setDuration (200); //The fast part.
//set other things for anim2

播放时如何改变动画速度？

How to change animation speed when is playing?

android

android-animation