(It actually appears that anything greater than or equal to half of the height/width works, so to avoid having to change the radius every time you update the height/width, you could instead set it to a very high value such as 1000dp, the risk being it could break if this behaviour ever changes.) Set app:cornerRadius to half of the height/width Set android:layout_height and android:layout_width to the same value Rather than hardcode the button colours for every behaviour I opted to hardcode the corner radius, which feels marginally less hacky and retains all the default button behaviour (changing colour when it's pressed and other visual effects) and uses the app style colours by default: Unfortunately using an XML drawable and overriding the background means you have to explicitly set the colour instead of being able to use the app style colours. If you want use VectorDrawable and ConstraintLayout
Modifier = Modifier.width(48.dp).height(48.dp), With jetpack compose you can use: Button( Use the app:shapeAppearanceOverlay attribute to get rounded corners.
With the official Material Components library you can use the MaterialButton applying a style.Ĭurrently the app:iconPadding="0dp", android:insetLeft, android:insetTop, android:insetRight, android:insetBottom attributes are needed to center the icon on the button avoiding extra padding space.
Otherwise, you'll face weird exceptions in previous android version. You've to keep both files in order to make the drawable backward-compatible.If you want it to show all these states (enabled, disabled, highlighted etc), you will use selector as described here.Save the following contents as round_button.xml in drawable folder Īndroid Material Effect: Although FloatingActionButton is a better option, If you want to do it using xml selector, create a folder drawable-v21 in res and save another round_button.xml there with following xml Īnd set it as background of Button in xml like this:
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