How to set border radius and remove Header bar to showDatePicker?

Question

I'm using the showDatePicker() method to display a date picker in my flutter application. How do I set border radius and remove Header bar?

Here is my code:

showDatePicker(
  locale: Locale('ja'),
  context: context,
  initialDate: _dateTime,
  firstDate:
      DateTime(DateTime.now().year - 5),
  lastDate: DateTime(DateTime.now().year + 5),
  builder: (context, child) {
    return Theme(
      data: ThemeData.light().copyWith(
        primaryColor:
            helper.hexColor('#007AFF'),
        accentColor:
            helper.hexColor('#007AFF'),
        colorScheme: ColorScheme.light(
            primary:
                helper.hexColor('#007AFF')),
        buttonTheme: ButtonThemeData(
            textTheme: ButtonTextTheme
                .primary), // This will change to light theme.
      ),
      child: child,
    );
  },
);

Answer 1

You can set border radius in your ThemeData:

ThemeData(
      dialogTheme: const DialogTheme(
          shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.all(Radius.circular(16)))),
)