Png image button with background in Android Activity

Question

When I use ImageButton in an activity it appears with a background color like this:

What do I have to do to remove this dark color?

Answer 1

Use imageButton.setBackgroundColor(Color.TRANSPARENT);

Or, if you want to do it in XML: android:background="@android:color/transparent"

Answer 2

If your png file has transparent background and you want a transparent background, save your image files with PNG 32 format.