Flutter：日期与时间选择器的国际化

[wanghao]

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:
    sdk: flutter

return MaterialApp.router(
      localizationsDelegates: const [
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
      ],
      theme: appTheme,
      darkTheme: appThemeDark,
      themeMode: appThemeStore.themeMode,
      debugShowCheckedModeBanner: false,
      routerDelegate: AppRouterDelegate(
        navigatorKey: appRouterStore.navigatorKey,
      ),
      routeInformationParser: AppRouteInformationParser(),
    );

 final datetime = await showDateRangePicker(
                context: context,
                firstDate: now,
                lastDate: now.add(Duration(days: 365)),
                locale: Locale('zh', 'CN'),
                helpText: '选择活动日期范围',
              );

showTimePicker(
                context: context,
                initialTime: TimeOfDay.now(),
                helpText: '选择活动开始时间',
                builder: (context, child) {
                  if (MediaQuery.of(context).alwaysUse24HourFormat) {
                    return child!;
                  } else {
                    return Localizations.override(
                      context: context,
                      locale: Locale('zh', 'CN'),
                      child: child,
                    );
                  }
                },
              );