Material Button border

There are text, contained, and toggle buttons. Text buttons are typically used for less important actions. Outlined buttons are used for more emphasis than text buttons due to the stroke . Contained buttons have more emphasis, as they use a color fill and shadow.

You can use one of these styles:

Extended floating action buttons are used for a special type of promoted action . A convenience class for creating a new Material button. This class supplies updated Material styles for the button in the constructor. The widget will display the correct default Material styles without the use of the style flag.19 Oca 2022