setAlpha(int a) not working when used inside a thread

Question

I am trying to change the view Alpha using setAlpha(int a) method, but it has no effect and also tried to perform alpha animation on same but the same result!. Please help. Here is the part of code..

public void run() {
            runOnUiThread(new Runnable() {

                    @Override
                    public void run() {
                        myImage.setAlpha(1);
                    }
                });

        }

That method is deprecated. You should use setImageAlpha(int alpha) instead, though I don't know whether that solves the problem. — DuneCat, Oct 05 '12 at 08:24
@DuneCat How did you come to the conclusion that it is deprecated? I see no mention of it at http://developer.android.com/reference/android/view/View.html#setAlpha(float) — faizal, Jul 08 '14 at 05:04
@faizal It's not deprecated in View, but in ImageView: http://developer.android.com/reference/android/widget/ImageView.html#setAlpha%28int%29 — DuneCat, Jul 09 '14 at 13:31

score 9 · Accepted Answer · edited May 23 '17 at 12:24

9

I don't know which values you've tried using, but the method takes values from 0 to 255, where 255 is completely opaque, as per this answer.

edited May 23 '17 at 12:24

Community

1
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answered Oct 05 '12 at 08:32

DuneCat

788
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I figured out the same, 255 is opaque and 0 is transparent.anywz thx for the answer – CodeFury Oct 05 '12 at 13:12

score 2 · Answer 2 · edited Feb 19 '15 at 22:50

2

Try this:

myImage.getBackground().setAlpha(100);

edited Feb 19 '15 at 22:50

GitaarLAB

14,536
11
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answered Apr 15 '13 at 06:10

Nikhil Chaurasiya

123
9

I think you mean setAlpha(255) ;) – REJH Jun 30 '18 at 17:21

setAlpha(int a) not working when used inside a thread

2 Answers2