How can I animate a view in Android and have it st

问题:

I currently have a view in my Android app and the view is playing a frame animation. I want to animate the view to increase its size to 150%. When I apply a scale animation to it, and the scale animation is completed, I want the view to stay at that new size for the rest of the activity's life cycle. Unfortunately right now when the scale up animation is complete, the view snaps back to the original size. How can I get it to keep the new animated tranformation?

I'm using

myView.startAnimation(AnimationUtils.loadAnimation(mContext,R.anim.scaleUp150));

Thanks!

回答1:

Make sure you add below attributes to the root element in your animation xml:

android:fillAfter="true" 
android:fillEnabled="true"

回答2:

try constructing the animation from code and setting the properties like this

anim.setFillEnabled(true);
anim.setFillAfter(true);

回答3:

if you want to put your animation in an xml, it may need this to help:

<set
android:fillEnabled="true"
android:fillAfter="true"
xmlns:android="http://schemas.android.com/apk/res/android">

<translate
    android:fromYDelta="0"
    android:toYDelta="-20%p"
    android:duration="7000" />

</set>

https://stackoverflow.com/a/6519233/371749

please also appreciate the other answer, helped me :) good luck!

回答4:

Nowadays it has become very easy:

view.animate().x(valueX).y(valueY).setDuration(500).start();

(In this snippet ViewPropertyAnimator has been used).

There is possible to append multiple other options either.

The View will be located in the new position.

回答5:

EDIT: Qlimax's answer is better, but since the OP hasn't returned to change the checkmark and I can't delete an accepted answer, I'll copy it up here: just set fillAfter=true fillEnabled=true

My original answer (which works, but is mildly ridiculous by comparison) follows:

For things to work as expected after the animation, at least according to this thread, you will have to write an onAnimationEnd handler, and in there, manually adjust the "real" (pre-transformation) bounds of your view to match the end result of the scale animation.

回答6:

Actually, as the animation you are using seems to be one embedded in the Android framework, I'm not sure you can change anything in it.
However, you can create you own animation by following the example in the documentation. And you will have to put android:fillAfter="true" if you want the scaling to be kept after the end of the animation.

回答7:

Put android:fillAfter="true" in the SET tag - as putting them in animation tag confines them to the "transition parameters" or "during/while animating parameters". The parameters in the SET will apply the transformation you are looking for after it finishes the animations.