無法從我的Flutter應用程式發送本地通知

我flutter_local_notifications在我的應用程式中使用依賴項在按下按鈕后發送本地通知。在應用程式中，執行按鈕時，應該會出現本地通知，并且應用程式應該導航到第二個螢屏。但是，只有第二個操作正在執行，并且沒有顯示通知。我參考了這個 YouTube 教程，在我的應用程式中創建本地通知。

notificationservice.dart我的應用程式的檔案是：

import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:timezone/timezone.dart' as tz;
import 'package:timezone/data/latest.dart' as tz;

class NotificationService {
  static final NotificationService _notificationService = NotificationService._internal();

  factory NotificationService() {
    return _notificationService;
  }

  final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =

 

    FlutterLocalNotificationsPlugin();
    
      NotificationService._internal();
    
      Future<void> initNotification() async {
        final AndroidInitializationSettings initializationSettingsAndroid =
        AndroidInitializationSettings('@drawable/ic_launcher');

    final IOSInitializationSettings initializationSettingsIOS =
    IOSInitializationSettings(
      requestAlertPermission: false,
      requestBadgePermission: false,
      requestSoundPermission: false,
    );

    final InitializationSettings initializationSettings =
    InitializationSettings(
      android: initializationSettingsAndroid,
      iOS: initializationSettingsIOS
    );

    await flutterLocalNotificationsPlugin.initialize(initializationSettings);
  }

  Future<void> showNotification(int id, String title, String body, int seconds) async {
    await flutterLocalNotificationsPlugin.zonedSchedule(
      id,
      title,
      body,
      tz.TZDateTime.now(tz.local).add(Duration(seconds: seconds)),
      const NotificationDetails(
        android: AndroidNotificationDetails(
          'main_channel',
          'Main Channel',
          channelDescription: 'Main channel notifications',
          importance: Importance.max,
          priority: Priority.max,
          icon: '@drawable/ic_launcher'
        ),
        iOS: IOSNotificationDetails(
          sound: 'default.wav',
          presentAlert: true,
          presentBadge: true,
          presentSound: true,
        ),
      ),
      uiLocalNotificationDateInterpretation: UILocalNotificationDateInterpretation.absoluteTime,
      androidAllowWhileIdle: true,
    );
  }
}

TextButtonwidget中本地通知功能的實作如下：

TextButton(
            onPressed: () {
                //lines of codes
                NotificationService().showNotification(1, "title", "body", 5);

                Navigator.of(context).pushNamed(CaseConfirmationScreen.routeName);
            },
            child: Text(
              "File Case",
              style: GoogleFonts.poppins(
                color: Colors.white,
                fontSize: 26.0,
                fontWeight: FontWeight.w500,
                letterSpacing: 2.0,
              ),
            ),
            style: TextButton.styleFrom(
              backgroundColor: Colors.red,
              shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(6.0),
              ),
              padding: const EdgeInsets.symmetric(
                horizontal: 22.0,
                vertical: 15.0,
              ),
            ),
          ),

除錯控制臺中顯示的錯誤是這樣的。

Youtube教程中的應用程式源代碼

我應該怎么做才能清除這個錯誤？

uj5u.com熱心網友回復：

將您的圖示添加到 [projectFolder]/android/app/src/main/res/drawable（例如 app_icon.png）并在此處使用該名稱：

var initializationSettingsAndroid =
new AndroidInitializationSettings('@mipmap/ic_launcher');

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