Alpha animation not working

Question

Pretty simple: I add a dynamic button on screen and I try to fade it out after adding, but the animation never plays. I tried adding it later when it is already rendered on the screen, but still nothing. Below is the code:

btn = new ImageButton(context);
btn.setBackgroundColor(0xFFFF0000);

params = new WindowManager.LayoutParams(
    width,height,
    WindowManager.LayoutParams.TYPE_SYSTEM_ALERT | 
    WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
    WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH |
    WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
    PixelFormat.TRANSLUCENT);
params.gravity = Gravity.TOP | Gravity.LEFT;

windowManager.addView(btn, params);

btn.startAnimation(new AlphaAnimation(1,0));

Any ideas?

score 7 · Answer 1 · answered Sep 23 '13 at 08:28

7

Try this:

btn.setAlpha(0f);
btn.animate().alpha(1).setDuration(1000);

answered Sep 23 '13 at 08:28

Daniel Bo

2,518
1
18
29

This worked for me. Nice and straight-forward. Great answer! – ninjachippie Jul 14 '16 at 15:57

score 0 · Answer 2 · edited May 23 '17 at 12:16

0

This answer may explain why you're getting such strange behavior if you've set the alpha to 0 in xml.

edited May 23 '17 at 12:16

Community

1
1

answered Aug 10 '15 at 21:07

riffdigital

1

1

If another question on SO is similar to this and there is an answer posted there which will solve this question you should flag this as a duplicate of the the other question. – IKavanagh Aug 10 '15 at 21:19

Alpha animation not working

2 Answers2

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