Create a Button with Gradient Borders in Flutter

To create a gradient border for a button in Flutter, we can use the BoxDecoration property of the DecoratedBox widget. This property provides a variety of options for specifying how a box should be decorated.

DecoratedBox(
  decoration: const BoxDecoration(gradient: LinearGradient(colors: [Colors.indigo, Colors.blueAccent])),
  child: Container(
    color: Colors.white,
    margin: const EdgeInsets.all(4.0),
    child: TextButton(
      onPressed: () {},
      child: const Text("Gradient Button"),
    ),
  ),
),
DecoratedBox(
  decoration: const BoxDecoration(gradient: SweepGradient(colors: [Colors.red, Colors.orangeAccent])),
  child: Container(
    color: Colors.white,
    margin: const EdgeInsets.all(6.0),
    child: TextButton(
      onPressed: () {},
      child: const Text("Gradient Button"),
    ),
  ),
),