Android: Keep ratio for a full-width and undefined height ImageView in a ConstraintLayout?

Question

In a ConstraintLayout, an ImageView is bound to its parent in such a way that:

1. Its left side is bound to the screen\'s left side

Answer 1

In addition to the last answer, the reason your image is not being scaled properly is because you are using it as the background.

Your code..

android:background="@drawable/ic_background_stars"

Instead, use it as image resource.

app:srcCompat="@drawable/ic_background_stars"

And the default scale type of ImageView should do the work for you. Else, you can even experiment with various scale types.

Answer 2

I think that you can use app:layout_constraintDimensionRatio="your ratio" to keep the aspect ratio if your image

For example, if you want square you need the same width and height so use - app:layout_constraintDimensionRatio="1:1"