将代码移动到另一个项目后广播接收器不起作用

我已经浏览了整个代码，一切似乎都正常工作，没有错误，这使得找到解决方案变得更加困难。

我已将代码移动到另一个项目。

这是我的广播接收器类：

public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    Notification.Builder builder = new Notification.Builder(context);
    builder.setContentTitle(intent.getStringExtra("Next"));
    builder.setContentText(intent.getStringExtra("String"));
    builder.setSmallIcon(R.drawable.notify);
    NotificationManager notificationManager =
            (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(325, builder.build());
}
}

我在我的主要活动中这样称呼它：

    private void notifyUser() {
    Intent intent = new Intent(this, MyBroadcastReceiver.class);
    intent.putExtra("Next", getResources().getString(R.string.lesson_next));
    int days_int = (sun) ? 1:2;
    for (int i = 0; i < days_length; i++) {
        Calendar[] calendars = getCalendars(i, days_int + i);
        ArrayList<String> arrayList = schedules.get(i);
        for (int j = 0; j < calendars.length; j++) {
            String s = arrayList.get(j);
            if (!s.equals(getResources().getString(R.string.lesson_window))) {
                intent.putExtra("String", s);
                notifyUserTag(intent, 135124 + count, calendars[j].getTimeInMillis());
                count++;
            }
        }
    }
}
private void notifyUserTag(Intent intent, int id, long currentTimeMillis) {
    PendingIntent pendingIntent = PendingIntent.getBroadcast(
            this.getApplicationContext(), id, intent, 0);
    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, currentTimeMillis,
            AlarmManager.INTERVAL_DAY * 7, pendingIntent);
}
private Calendar[] getCalendars(int i, int day) {
    int[] nums = lessonNum(schedules.get(i)); int len = nums.length;
    Calendar[] calendars = new Calendar[len];
    for (int k = 0; k < len; k++)
        calendars[k] = setCalendar(nums[k], day);
    return calendars;
}
private int[] lessonNum(ArrayList<String> stringArrayList) {
    int size = stringArrayList.size();
    int[] nums = new int[size];
    for (int i = 0; i < size; i++)
        nums[i] = lessonNumTry(i, stringArrayList);
    return nums;
}
private int lessonNumTry(int i, ArrayList<String> arrayList) {
    try {
        if (Integer.parseInt(arrayList.get(i).substring(1,2)) == 0)
            return 10;
    }
    catch (NumberFormatException e) {
        return Integer.parseInt(arrayList.get(i).substring(0,1));
    }
    return -1;
}
private Calendar setCalendar(int i, int day) {
    Calendar calendar = Calendar.getInstance();
    switch (i) {
        case 0:
            calHelper(calendar, day, 6, 0);
            break;
        case 1:
            calHelper(calendar, day, 7, 0);
            break;
        case 2:
            calHelper(calendar, day, 8, 0);
            break;
        case 3:
            calHelper(calendar, day, 8, 55);
            break;
        case 4:
            calHelper(calendar, day, 9, 50);
            break;
        case 5:
            calHelper(calendar, day, 10, 55);
            break;
        case 6:
            calHelper(calendar, day, 11, 50);
            break;
        case 7:
            calHelper(calendar, day, 12, 45);
            break;
        case 8:
            calHelper(calendar, day, 13, 40);
            break;
        case 9:
            calHelper(calendar, day, 14, 25);
            break;
        case 10:
            calHelper(calendar, day, 15, 15);
            break;
    }
    return calendar;
}
private void calHelper(Calendar calendar, int day, int hour, int minute) {
    long currTime = calendar.getTimeInMillis();
    calendar.set(Calendar.DAY_OF_WEEK, day);
    calendar.set(Calendar.HOUR_OF_DAY, hour);
    calendar.set(Calendar.MINUTE, minute);
    calendar.set(Calendar.SECOND, 0);
    long getTime = calendar.getTimeInMillis();
    if (getTime < currTime)
        calendar.setTimeInMillis(getTime + 604800000);
}

发送通知的函数 （notifyUser（）） 应该获取一组日历，每个日历指定一天/小时/分钟，并设置警报以在那时每周启动广播接收器。我在旧项目中使用了完全相同的代码并且它有效，现在它没有。我的旧项目和新项目之间的主要变化是新项目使用数据库来存储数据 （sqlite3），而旧项目使用文件，我认为这与广播接收器没有被调用/显示/这里发生了什么无关。

在清单中，我有这个

<receiver android:name=".MyBroadcastReceiver" />

任何帮助将不胜感激！