correct 'view file' processing on android

lib/file/widget/view_selected_file_widget.dart

@@ -1,10 +1,13 @@
 import 'package:chrono_sheet/file/model/google_file.dart';
 import 'package:chrono_sheet/file/state/files_state.dart';
 import 'package:chrono_sheet/generated/app_localizations.dart';
+import 'package:chrono_sheet/logging/logging.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:url_launcher/url_launcher.dart';
 
+final _logger = getNamedLogger();
+
 class ViewSelectedFileWidget extends ConsumerWidget {
   const ViewSelectedFileWidget({super.key});
 
@@ -13,12 +16,23 @@ class ViewSelectedFileWidget extends ConsumerWidget {
     final browserUri = Uri.parse("https://docs.google.com/spreadsheets/d/${file.id}/edit");
     final messenger = ScaffoldMessenger.of(context);
     final l10n = AppLocalizations.of(context);
-    if (await canLaunchUrl(appUri)) {
+    try {
+      // we experienced that canLaunchUrl() returns 'false' for all urls under android. That is due to the fact
+      // that by default applications are not allowed to query information about other applications.
+      // It's possible to overcome that by configuring 'android.intent.action.VIEW' intent action query
+      // and/or requesting 'android.permission.QUERY_ALL_PACKAGES' permission. However, it looks easier to
+      // just try to launch and handle an exception (if any).
+      // More details can be found at https://developer.android.com/training/package-visibility
       await launchUrl(appUri);
-    } else if (await canLaunchUrl(browserUri)) {
-      await launchUrl(browserUri);
-    } else {
-      messenger.showSnackBar(SnackBar(content: Text(l10n.errorCanNotOpenFile)));
+      return;
+    } catch (_) {
+      _logger.info("failed to open the sheet document '${file.name}' in the google sheets application");
+      try {
+        await launchUrl(browserUri);
+      } catch (_) {
+        _logger.info("failed to open the sheet document '${file.name}' in the browser");
+        messenger.showSnackBar(SnackBar(content: Text(l10n.errorCanNotOpenFile)));
+      }
     }
   }