Der Datumsauswahldialog spricht jetzt deutsch (#20115)

packages/flutter_localizations/lib/src/material_localizations.dart

@@ -104,23 +104,21 @@ class GlobalMaterialLocalizations implements MaterialLocalizations {
     _translationBundle = translationBundleForLocale(locale);
     assert(_translationBundle != null);
 
-    const String kMediumDatePattern = 'E, MMM\u00a0d';
     if (intl.DateFormat.localeExists(_localeName)) {
       _fullYearFormat = new intl.DateFormat.y(_localeName);
-      _mediumDateFormat = new intl.DateFormat(kMediumDatePattern, _localeName);
+      _mediumDateFormat = new intl.DateFormat.MMMEd(_localeName);
       _longDateFormat = new intl.DateFormat.yMMMMEEEEd(_localeName);
-      _yearMonthFormat = new intl.DateFormat('yMMMM', _localeName);
+      _yearMonthFormat = new intl.DateFormat.yMMMM(_localeName);
     } else if (intl.DateFormat.localeExists(locale.languageCode)) {
       _fullYearFormat = new intl.DateFormat.y(locale.languageCode);
-      _mediumDateFormat = new intl.DateFormat(kMediumDatePattern, locale.languageCode);
-
+      _mediumDateFormat = new intl.DateFormat.MMMEd(locale.languageCode);
       _longDateFormat = new intl.DateFormat.yMMMMEEEEd(locale.languageCode);
-      _yearMonthFormat = new intl.DateFormat('yMMMM', locale.languageCode);
+      _yearMonthFormat = new intl.DateFormat.yMMMM(locale.languageCode);
     } else {
       _fullYearFormat = new intl.DateFormat.y();
-      _mediumDateFormat = new intl.DateFormat(kMediumDatePattern);
+      _mediumDateFormat = new intl.DateFormat.MMMEd();
       _longDateFormat = new intl.DateFormat.yMMMMEEEEd();
-      _yearMonthFormat = new intl.DateFormat('yMMMM');
+      _yearMonthFormat = new intl.DateFormat.yMMMM();
     }
 
     if (intl.NumberFormat.localeExists(_localeName)) {

packages/flutter_localizations/test/date_time_test.dart

@@ -114,5 +114,47 @@ void main() {
         expect(await formatTimeOfDay(tester, const Locale('zh', ''), const TimeOfDay(hour: 9, minute: 32)), '上午 9:32');
       });
     });
+
+    group('date formatters', () {
+      Future<Map<DateType, String>> formatDate(WidgetTester tester, Locale locale, DateTime dateTime) async {
+        final Completer<Map<DateType, String>> completer = new Completer<Map<DateType, String>>();
+        await tester.pumpWidget(new MaterialApp(
+          supportedLocales: <Locale>[locale],
+          locale: locale,
+          localizationsDelegates: const <LocalizationsDelegate<dynamic>>[
+            GlobalMaterialLocalizations.delegate,
+          ],
+          home: new Builder(builder: (BuildContext context) {
+            final MaterialLocalizations localizations = MaterialLocalizations.of(context);
+            completer.complete(<DateType, String>{
+              DateType.year: localizations.formatYear(dateTime),
+              DateType.medium: localizations.formatMediumDate(dateTime),
+              DateType.full: localizations.formatFullDate(dateTime),
+              DateType.monthYear: localizations.formatMonthYear(dateTime),
+            });
+            return new Container();
+          }),
+        ));
+        return completer.future;
+      }
+
+      testWidgets('formats dates in English', (WidgetTester tester) async {
+       final Map<DateType, String> formatted = await formatDate(tester, const Locale('en', ''), new DateTime(2018, 8, 1));
+       expect(formatted[DateType.year], '2018');
+       expect(formatted[DateType.medium], 'Wed, Aug 1');
+       expect(formatted[DateType.full], 'Wednesday, August 1, 2018');
+       expect(formatted[DateType.monthYear], 'August 2018');
+      });
+
+      testWidgets('formats dates in German', (WidgetTester tester) async {
+        final Map<DateType, String> formatted = await formatDate(tester, const Locale('de', ''), new DateTime(2018, 8, 1));
+        expect(formatted[DateType.year], '2018');
+        expect(formatted[DateType.medium], 'Mi., 1. Aug.');
+        expect(formatted[DateType.full], 'Mittwoch, 1. August 2018');
+        expect(formatted[DateType.monthYear], 'August 2018');
+      });
+    });
   });
 }
+
+enum DateType { year, medium, full, monthYear }