Adding a font to existing Flutter code

customFont.dart

// declaring a text style based on custom font
const jokeTextStyle = const TextStyle(
    fontFamily: 'Patrick Hand',
    fontSize: 34.0,
    color: Colors.black87,
    letterSpacing: -0.5,
    fontStyle: FontStyle.normal,
    fontWeight: FontWeight.normal);

// now all we have to do is add a style to the Text widget
final decoded = json.decode(snapshot.data);
if (decoded['status'] == 200) {
  return new Text(decoded['joke'], style: jokeTextStyle);