I have an ImageView with android:layout_width=100dp
, android:layout_height=wrap_content
and android:adjustViewBounds=true
It's source is a 50 x 50 px picture. But the aspect ratio is not preserved - height of the ImageView is 50px, not 100px (i.e. adjustViewBounds
is not working). If I have a 200x200px picture it works - width and height are 100px. This code results in a 100px wide and 50px tall picture but the src image is square:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:id="@+id/photo"
android:src="@drawable/icon"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:scaleType="fitXY"
android:adjustViewBounds="true" />
</LinearLayout>
The issue is that adjustViewBounds
will not increase the size of the ImageView
beyond the natural dimensions of the drawable. It will only shrink the view to maintain aspect ratio; if you provide a 500x500 image instead of a 50x50 image, this should work.
If you're interested in the spot where this behavior is implemented, see ImageView.java's onMeasure implementation.
One workaround is to implement a custom ImageView
that changes this behavior in onMeasure
.