Fit image into ImageView, keep aspect ratio and then resize ImageView to image dimensions?

Question

How to fit an image of random size to an ImageView?
When:

• Initially ImageView dimensions are 250dp * 250dp
• The image's larger dimension should be scaled up/down to 250dp
• The image should keep its aspect ratio
• The ImageView dimensions should match scaled image's dimensions after scaling

E.g. for an image of 100*150, the image and the ImageView should be 166*250.
E.g. for an image of 150*100, the image and the ImageView should be 250*166.

If I set the bounds as

<ImageView
    android:id="@+id/picture"
    android:layout_width="250dp"
    android:layout_height="250dp"
    android:layout_gravity="center_horizontal"
    android:layout_marginTop="20dp"
    android:adjustViewBounds="true" />

images fit properly in the ImageView, but the ImageView is always 250dp * 250dp.

Answer 1

May not be answer for this specific question, but if someone is, like me, searching for answer how to fit image in ImageView with bounded size (for example, maxWidth) while preserving Aspect Ratio and then get rid of excessive space occupied by ImageView, then the simplest solution is to use the following properties in XML:

    android:scaleType="centerInside"
    android:adjustViewBounds="true"