如何在Android中实现多个定时通知

Question

我对于我创建的应用程序具有此最终功能。我所做的应用程序是一个日历，用于保存事件并在时间到达时通知用户。我遇到的问题是，当我创建多个通知（或多个事件）时，它只会通知最新创建的通知。我试图为通知制作不同的ID，但没有成功。这里是我修改的代码。它来自我见过的教程。

AlarmTask.java

public class AlarmTask implements Runnable{ 
// The date selected for the alarm 
private final Calendar date; 
// The android system alarm manager 
private final AlarmManager am; 
// Your context to retrieve the alarm manager from 
private final Context context; 

private final long alarmID; 

public AlarmTask(Context context, Calendar date, long id) { 
    this.context = context; 
    this.am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); 
    this.date = date; 
    this.alarmID = id; 
} 

@Override 
public void run() { 
    // Request to start are service when the alarm date is upon us 
    // We don't start an activity as we just want to pop up a notification into the system bar not a full activity 

    Intent intent = new Intent(context, NotifyService.class); 
    intent.putExtra(NotifyService.INTENT_NOTIFY, true); 
    intent.putExtra("alarmID", alarmID); 
    PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent, 0); 

    // Sets an alarm - note this alarm will be lost if the phone is turned off and on again 
    am.set(AlarmManager.RTC, date.getTimeInMillis(), pendingIntent); 
} 

}

NotifyService.java

public class NotifyService extends Service { 

/** 
* Class for clients to access 
*/ 
public class ServiceBinder extends Binder { 
    NotifyService getService() { 
     return NotifyService.this; 
    } 
} 

// Unique id to identify the notification. 
private static final int NOTIFICATION = 143; 
// Name of an intent extra we can use to identify if this service was started to create a notification 
public static final String INTENT_NOTIFY = "com.gpplsmje.mac.calendar.utils.INTENT_NOTIFY"; 
// The system notification manager 
private NotificationManager mNM; 

@Override 
public void onCreate() { 
    Log.i("NotifyService", "onCreate()"); 
    mNM = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); 
} 

@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
    Log.i("LocalService", "Received start id " + startId + ": " + intent); 

    // If this service was started by out AlarmTask intent then we want to show our notification 
    if(intent.getBooleanExtra(INTENT_NOTIFY, false)){ 
     showNotification(intent.getLongExtra("alarmID", 0)); 
    } 
    // We don't care if this service is stopped as we have already delivered our notification 
    return START_NOT_STICKY; 
} 

@Override 
public IBinder onBind(Intent intent) { 
    return mBinder; 
} 

// This is the object that receives interactions from clients 
private final IBinder mBinder = new ServiceBinder(); 

/** 
* Creates a notification and shows it in the OS drag-down status bar 
*/ 
@SuppressWarnings("deprecation") 
private void showNotification(long alarmID) { 
    SaveEvent event = new SaveEvent(this); 
    event.open(); 

    Log.d("Notification: ID", alarmID + ""); 
    // This is the 'title' of the notification 
    CharSequence title = event.getEventName(alarmID); 
    // This is the icon to use on the notification 
    int icon = R.drawable.icon_reminder; 
    // This is the scrolling text of the notification 
    CharSequence text = event.getEventDesc(alarmID);   
    // What time to show on the notification 
    long time = System.currentTimeMillis(); 

    event.close(); 

    Intent backToEventDetail = new Intent(this, CalendarEventDetail.class); 

    PendingIntent contentIntent = PendingIntent.getActivity(this, 0, backToEventDetail, 0); 

    Notification notify = new Notification.Builder(this) 
     .setContentTitle(title) 
     .setContentText(text) 
     .setSmallIcon(icon) 
     .setContentIntent(contentIntent).getNotification(); 

    notify.defaults = Notification.DEFAULT_SOUND; 


    notify.flags = Notification.FLAG_AUTO_CANCEL; 

    // Send the notification to the system. 
    mNM.notify(Integer.parseInt(String.valueOf(alarmID)), notify); 

    // Stop the service when we are finished 
    stopSelf(); 
} 
} 

从我的代码明白了，AlarmTask.java接收到报警日期，并将它通知当天。我传递的ID是我保存在手机数据库中的事件的ID。但我无法获得它添加多个通知。它只收到我保存的最新内容。我希望它能够获取所有事件并为每个事件设置通知。有人可以帮我吗？这样

PendingIntent contentIntent = PendingIntent.getActivity(this, (int)(Math.random() * 100), backToEventDetail, PendingIntent.FLAG_UPDATE_CURRENT); 

Answer 1

创建挂起的意图与下面的代码创建待定意图

PendingIntent contentIntent = PendingIntent.getActivity(this, Integer.parseInt(String.valueOf(alarmID)), backToEventDetail, Intent.FLAG_ACTIVITY_NEW_TASK); 

Answer 2