Android Alpha Animation: Alpha value jumps back to old value after Animation ended

Question

I have a ImageButton View on a Layout. If the users clicks the ImageButton the button should fade out.

The buttons fadeout animation will be started like this:

public void buttonClicked(View aButton){

    final Animation aAnim = new AlphaAnimation(1.0f, 0.0f);
    aAnim.setDuration(500);

    aButton.startAnimation(aAnim);

}

This works, but as soon as the ImageButton is faded out, its Alpha Value jumps right back to 1.0 and the button is visible again.

I solved it temporarily with a Animation Listener that sets the ButtonImage to invisible at the end of the Animation but that seems to be a odd solution to me.

What do I have to do to keep the buttons Alpha Value at its last value of the Animation?

Thank You.

Your "odd solution" is the way to go. It's a known problem with android animations before honeycomb. The easier method is the one by MikeT but it doesn't always work the way you'd expect it to — Michał Klimczak, May 25 '12 at 14:34

score 29 · Accepted Answer · edited Jul 28 '14 at 07:36

29

try using aAnim.setFillAfter(true);

edited Jul 28 '14 at 07:36

naught101

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answered May 25 '12 at 14:31

MikeC

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score 3 · Answer 2 · edited Sep 04 '14 at 19:02

3

If you want to set new value when animation finished, you must set the 'setFillAfter' to true.

public void buttonClicked(View aButton){    
    final Animation aAnim = new AlphaAnimation(1.0f, 0.0f);
    aAnim.setDuration(500);

    aAnim.setFillAfter(true);
    aButton.startAnimation(aAnim);
}

edited Sep 04 '14 at 19:02

Nyx

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answered Dec 02 '12 at 07:09

Salman Amintabar

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aAnim.setFillAfter(true); <- The animation gets the modifier, not the button itself. – Abandoned Cart Aug 13 '13 at 21:18

score 0 · Answer 3 · answered May 13 '19 at 14:11

0

you should also check this on your XML, for some scenarios it happens

android:animateLayoutChanges=“true”

answered May 13 '19 at 14:11

VITROXMAN

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Android Alpha Animation: Alpha value jumps back to old value after Animation ended

3 Answers3