how to change the alpha value of imageview

Question

In my app I want to change the ImageView like the following. I want only to change the image on the body.

enter image description here

I have followed the following link to change the alpha values by using the code like that

imageView.setAlpha(255);

But it is not working.

How to Set Opacity (Alpha) for View in Android. Please anybody suggest me how to do that.

So post your code what you're doing – Stefan de Bruijn Mar 26 '13 at 10:03 — Stefan de Bruijn, Mar 26 '13 at 10:03
pass alpha value between 0 to 1 – Nishant Mar 26 '13 at 10:09 — Nishant, Mar 26 '13 at 10:09

score 17 · Accepted Answer · answered Mar 26 '13 at 10:04

17

Maybe you can try like this, I had troubles doing it normal way but with "animation" it was ok.

AlphaAnimation alpha = new AlphaAnimation(0.5F, 0.5F); // change values as you want
alpha.setDuration(0); // Make animation instant
alpha.setFillAfter(true); // Tell it to persist after the animation ends
// And then on your imageview
yourImageView.startAnimation(alpha);

answered Mar 26 '13 at 10:04

Marko Niciforovic

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thank u it is working fine.my requirement is i want different changes.how can i change that alpha values.please suggest me – rams Mar 26 '13 at 10:18
in AlphaAnimation(first parameter is starting point, so full alpha would be 1.0, second parameter is end point, where simple 0 would be transparent); – Marko Niciforovic Mar 26 '13 at 10:20

score 4 · Answer 2 · answered Mar 26 '13 at 10:08

4

Or, without using animation you can just use setAlpha(float alpha) on your ImageView.

answered Mar 26 '13 at 10:08

Ovidiu Latcu

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setalpha is available for api 11+! – Arash Jan 29 '14 at 16:29
whenever I try to put alpha by this method I cant see any changes! iv.setAlpha(50f) or iv.setImageAlpha(50) nothing happens ? WHY – Dr. aNdRO Mar 28 '14 at 05:25
As written in android developer doc : . This is a value from 0 to 1, where 0 means the view is completely transparent and 1 means the view is completely opaque. You should try with setAlpha(0.2f) – phyzalis Apr 04 '14 at 10:45

score 4 · Answer 3 · answered Jun 08 '14 at 17:26

4

It might be because setAlpha(float Alpha) has been deprecated as of API level 16 by setImageAlpha(float Alpha)

answered Jun 08 '14 at 17:26

7heViking

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`setAlpha(float)` isn't deprecated, only `setAlpha(int)` – Oush Jan 20 '21 at 05:19

score 1 · Answer 4 · answered Sep 26 '16 at 12:43

Opacity ranges between 0 to 1, and you have given the value as 255,
imageView.setAlpha(255).

So give the value between 0 to 1, such as when

you want the opacity of 50%, give 0.5. imageView.setAlpha(0.5f)

Also you can do it in XML file as follows:

android:layout_width="100dip"
android:layout_height="100dip"
android:id="@+id/imageViewIcon"
android:src="@drawable/icon"
android:alpha=".5"

how to change the alpha value of imageview

4 Answers4