安卓 TranslateAnimation无效

Question

I am trying to create animation that moves an image.

Lets have a look at following (like image locations on screen):

• 01 02
• 03 04

If I move from 01 to 02 , 03 to 04 , 01 to 03 , 02 to 04 , TranslateAnimation works fine.

But when I do 01 to 04 I will have no visual animation, and image takes immediate vertical position.

Could you please suggest what could be wrong?

Thanks.

Answer 1

Are you setting the duration and interpolator? This code works for me (was struggling with the same issue tonight):

trans = new TranslateAnimation(0, 100, 0, 100);
trans.setDuration(250);
trans.setInterpolator(new AccelerateInterpolator(1.0f));
someView.startAnimation(trans);

Also, I found that most elements don't actually have a width or height when queried in an activities constructor, so trying to transform based on those is going to give you a lot of 0->0 movement (ie: none) If you are animating based on element dimensions you may want to do some logging/Toasting to make sure you actually have a width/height at the point that you create the animation.