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.
Read moreHow do I give a material button border in flutter?
To add a border around a button, we can customize the button’s shape property . The shape requires a RoundedRectangleBorder property. RoundedRectangleBorder further requires a side property and an optional borderRadius property set.
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