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

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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.

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