If you use
ImageView in your android app layout and you get that unwanted padding around the image, here’s an Android XML attribute that helped me solved the layout issue:
android:adjustViewBounds="true" attribute to your ImageView XML tag and you’ll probably see the unwanted padding go away.
According to the ImageView docs:
Set this to true if you want the ImageView to adjust its bounds to preserve the aspect ratio of its drawable.
You might also want to check the related Java method: setAdjustViewBounds(boolean)