How to change time picker's format independent of language

Question

Anyone knows how I can use the AM/PM format of the time picker in any language?
The app has english & romanian languages, when in romanian the time picker it uses the 24 hour format, though I need AM/PM.

I didn't found any way to set a locale to it, so I am a bit stuck.

Answer 1

Since Filip didn't edit his answer, I will put an answer myself with the solution.

showTimePicker requires both setting alwaysUse24HourFormat to true and changing the locale to en-US in the builder method of the function.

Doing one without the either doesn't do anything.

So, the proper solution is:

 showTimePicker(
    context: context,
    initialTime: TimeOfDay.now(),
    builder: (BuildContext context, Widget? child) => MediaQuery(
      data: MediaQuery.of(context).copyWith(alwaysUse24HourFormat: false),
      child: Localizations.override(
        context: context,
        locale: const Locale('en', 'US'),
        child: child!,
      ),
    ),
  );

There is an open Github issue aswell, for this issue.

Answer 2

The TimePickerDialog gets its format from MediaQuery.of(context). As shown in the documentation for showTimePicker you can pass a builder to showTimePicker to force 24 hour format.

You can use the current Locale to pick the time format.

final time = showTimePicker(
  context: context,
  initialTime: const TimeOfDay(hour: 10, minute: 47),
  builder: (BuildContext context, Widget? child) {
  Locale locale = Localizations.localeOf(context);
  final force24HourFormat = locale.countryCode == 'RO';
    return MediaQuery(
      data: MediaQuery.of(context).copyWith(
        alwaysUse24HourFormat: force24HourFormat,
      ),
      child: child!,
    );
  },
);