通知未显示在datetimepicker上

Question

我正在尝试在自定义日期添加通知。我没有收到任何错误，但没有出现通知。请给我建议你的答案，我如何获得有关datetimepicker的通知。如果还有另一种在自定义datetimepicker中添加通知的方法，也请提出建议。预先谢谢你

我的AddeditTaskActivity类

        private void scheduleNotification(Notification notification, long delay) {
            Intent notificationIntent = new Intent(this, MyNotificationPublisher.class);
            notificationIntent.putExtra(MyNotificationPublisher.NOTIFICATION_ID, 1);
            notificationIntent.putExtra(MyNotificationPublisher.NOTIFICATION, notification);
            PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
            AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
            assert alarmManager != null;
            alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, delay, pendingIntent);
        }

        private Notification getNotification(String content) {
            NotificationCompat.Builder builder = new NotificationCompat.Builder(this, default_notification_channel_id);
            builder.setContentTitle("Check Your TODO");
            builder.setContentText(content);
            builder.setSmallIcon(R.drawable.ic_launcher_foreground);
            builder.setAutoCancel(true);
            builder.setChannelId(NOTIFICATION_CHANNEL_ID);
            return builder.build();
        }


        private void showDateTimeDialog() {
            final Calendar calendar = Calendar.getInstance();
            final DatePickerDialog.OnDateSetListener dateSetListener = new DatePickerDialog.OnDateSetListener() {
                @Override
                public void onDateSet(DatePicker view, int year, int month, final int dayOfMonth) {
                    calendar.set(Calendar.YEAR,year);
                    calendar.set(Calendar.MONTH,month);
                    calendar.set(Calendar.DAY_OF_MONTH,dayOfMonth);

                    TimePickerDialog.OnTimeSetListener timeSetListener=new TimePickerDialog.OnTimeSetListener() {
                        @Override
                        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                            calendar.set(Calendar.HOUR_OF_DAY,hourOfDay);
                            calendar.set(Calendar.MINUTE,minute);
                            SimpleDateFormat simpleDateFormat=new SimpleDateFormat("EEEE, dd MMM yyyy" +" "+ "hh:mm"+" "+"a");
                            Date date = calendar.getTime();
                            tvDate.setText(simpleDateFormat.format(date));
                            scheduleNotification(getNotification(tvDate.getText().toString()), date.getTime());
                        }
                    };

                    new TimePickerDialog(AddEditTaskActivity.this,timeSetListener,calendar.get(Calendar.HOUR_OF_DAY),calendar.get(Calendar.MINUTE),false).show();
                }
            };
            DatePickerDialog datePickerDialog = new DatePickerDialog(AddEditTaskActivity.this,dateSetListener,calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),calendar.get(Calendar.DAY_OF_MONTH));
            datePickerDialog.getDatePicker().setMinDate(System.currentTimeMillis());
            datePickerDialog.show();
        }
    }




***MyNotification Publisher Class***


    public class MyNotificationPublisher extends BroadcastReceiver {
    public static String NOTIFICATION_ID = "notification-id" ;
    public static String NOTIFICATION = "notification" ;
    public void onReceive (Context context , Intent intent) {
        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context. NOTIFICATION_SERVICE ) ;
        Notification notification = intent.getParcelableExtra( NOTIFICATION ) ;
        if (android.os.Build.VERSION. SDK_INT >= android.os.Build.VERSION_CODES. O ) {
            int importance = NotificationManager. IMPORTANCE_HIGH ;
            NotificationChannel notificationChannel = new NotificationChannel( NOTIFICATION_CHANNEL_ID , "NOTIFICATION_CHANNEL_NAME" , importance) ;
            assert notificationManager != null;
            notificationManager.createNotificationChannel(notificationChannel) ;
        }
        int id = intent.getIntExtra( NOTIFICATION_ID , 0 ) ;
        assert notificationManager != null;
        notificationManager.notify(id , notification) ;
    }

}


***Android Manifest***


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.todosaman">

    <uses-permission android:name="android.permission.VIBRATE"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".Activity.SplashScreen"
            android:theme="@style/Theme.AppCompat.DayNight.NoActionBar">

        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        </activity>
        <activity android:name=".Activity.ActivityLogin"/>
        <activity android:name=".Activity.RegisterActivity"/>
        <activity android:name=".Activity.AddEditTaskActivity"
            android:parentActivityName=".Activity.MainActivity"></activity>
        <activity android:name=".Activity.MainActivity">
        </activity>

        <receiver android:name=".Activity.MyNotificationPublisher" />
        <meta-data
            android:name="preloaded_fonts"
            android:resource="@array/preloaded_fonts" />
    </application>

</manifest>