How to change the Alpha of an ImageView in android

Question

I have five ImageViews declared in the layout file. All of them have src attribute set to some image.

I want to give some effect something like changing the alpha value when you click on an image to the images.

Here is my code

 <ImageView
        android:id="@+id/imageViewNews"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:adjustViewBounds="true"
        android:scaleType="fitXY"
        android:src="@drawable/news" />

    <ImageView
        android:id="@+id/imageViewBookmark"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:adjustViewBounds="true"
        android:scaleType="fitXY"
        android:src="@drawable/bookmark" />

You might want to look at this: http://stackoverflow.com/questions/16755551/alternative-to-setalpha-in-api-level-8 — Chintan Soni, Feb 05 '15 at 09:59
May this help you. http://stackoverflow.com/questions/4931071/android-and-setting-alpha-for-image-view-alpha — Apurva, Feb 05 '15 at 10:03

score 2 · Accepted Answer · edited May 23 '17 at 12:19

2

In XML use

android:alpha="" alpha between 0 to 1

In code use

imageView.setAlpha(int);

Similar Question

edited May 23 '17 at 12:19

Community

1
1

answered Feb 05 '15 at 09:37

K Guru

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possible duplicate of http://stackoverflow.com/questions/4931071/android-and-setting-alpha-for-image-view-alpha – Apurva Feb 05 '15 at 10:04

score 0 · Answer 2 · answered Feb 05 '15 at 09:32

0

the simplest way is to use ViewCompat.setAlpha

  ViewCompat.setAlpha(imageViewInstace, alpha);

where alpha is a float between 0 and 1

answered Feb 05 '15 at 09:32

Blackbelt

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How to change the Alpha of an ImageView in android

2 Answers2