DART

flutter border around textbutton

OutlinedButton(
  onPressed: null,
  style: ButtonStyle(
    shape: MaterialStateProperty.all(
      RoundedRectangleBorder(
      	borderRadius: BorderRadius.circular(30.0),
      )
	),
  ),
  child: const Text("Button text"),
);

flutter: TextButton widget has border Circle

// TextButton has border circle not use Container()
TextButton(
  child: const Icon(
    Icons.play_circle,
    size: 55,
    color: Colors.white,
  ),
  style: TextButton.styleFrom(
    padding: const EdgeInsets.all(0),
    shape: CircleBorder(
      side: BorderSide(width: 8, color: Colors.blue.withOpacity(0.3)),
    ),
  ),
  onPressed: () {},
),