Purpose of ALPHA_CHANGED in Android

Question

In WindowManager.LayoutParams class there is a constant called ALPHA_CHANGED. What is the purpose of it? I can't seem to find anything about it.

score 0 · Answer 1 · answered Jun 07 '16 at 18:27

0

The alpha value has to do with the opacity of the view (i.e., how translucent it is). ALPHA_CHANGED is used to trigger events based on a change.

answered Jun 07 '16 at 18:27

Joel Nieman

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Thanks. So I can use it to trigger alpha changes if there is any in window. is it right? – dreamcoder Jun 07 '16 at 18:29
It's not used to change the alpha value but rather to capture a change in it triggered by something else, like a switch or a slider. – Joel Nieman Jun 07 '16 at 18:47
Do you have a specific use for it you are trying to figure out? – Joel Nieman Jun 07 '16 at 18:54
No.. I am just trying to understand concept – dreamcoder Jun 07 '16 at 18:55
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but how to use one? – magrif Feb 26 '22 at 19:04

Purpose of ALPHA_CHANGED in Android

1 Answers1