獲取多個推送通知顯示

Question

我想讓多個通知一次顯示，但他們總是覆蓋其他通知，所以總是隻有一個通知。

這裏的BackgroundService.class：

import saveload.*; 



public class BackgroundChecks extends Service { 

public static boolean started = false; 
private boolean interrupted = false; 
private Intent goToAmtsblatt = null; 
private Intent goToAmtstafel = null; 

private long sleepPeriod = 3*60*60*1000; 
ScheduledFuture sf = null; 

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

@Override 
public int onStartCommand(Intent intent, int a, int b) { 
    int ret = super.onStartCommand(intent, a, b); 
    try { 
     if (intent.hasExtra("notificationActivityAmtsblatt")) { 
      goToAmtsblatt = new Intent(this, Class.forName(intent.getStringExtra("notificationActivityAmtsblatt"))); 
     } 
    } catch(Exception cce) { 
     //do nothing 
    } 
    try { 
     if (intent.hasExtra("notificationActivityAmtstafel")) { 
      goToAmtstafel = new Intent(this, Class.forName(intent.getStringExtra("notificationActivityAmtstafel"))); 
     } 
    } catch(Exception cce) { 
     //do nothing 
    } 
    return ret; 
} 

@Override 
public void onCreate() { 
    super.onCreate(); 

    started = true; 
    //do the tasks in Background 


    ScheduledExecutorService ses = Executors.newSingleThreadScheduledExecutor(); 
    Runnable run = new Runnable() { 
     @Override 
     public void run() { 
      //gets Preference Set 
      final SharedPreferences sharedPref = BackgroundChecks.this.getSharedPreferences("gemeindeMuckendorf", Context.MODE_PRIVATE); 

      try { 
       getAktuelles(sharedPref); 
      } catch(Exception ex) { 
       //do nothing, just retry 
      } 
      try { 
       getServiceNews(sharedPref); 
      } catch(Exception ex) { 
       //do nothing, just retry 
      } 
      try { 
       getAmtsblatt(sharedPref); 
      } catch(Exception ex) { 
       //do nothing, just retry 
      } 
      try { 
       getAmtstafel(sharedPref); 
      } catch(Exception ex) { 
       //do nothing, just retry 
      } 
     } 
    }; 
    sf = ses.scheduleAtFixedRate(run, 0, sleepPeriod, TimeUnit.HOURS); 
} 


@Override 
public void onDestroy() { 
    super.onDestroy(); 
    if(sf!=null) 
     sf.cancel(true); 
    sf = null; 
    started = false; 
} 

public void getAmtsblatt(SharedPreferences sharedPref) throws Exception { 
    List<String> lastList = new ArrayList<String>(); 
    List<String> newList; 
    //gets Preferences - last successfully checked List 
    Thread.sleep(1000); 
    lastList = Utils.stringToList(sharedPref.getString("retrievedPDFString", "")); 
    newList = Utils.getUrlsFromHTML(Utils.getHTML("http://www.muckendorf-wipfing.at/5-0-Gemeindeblatt+Online.html")); 
    //count new URLs 
    int newCount = 0; 
    for (String url : newList) { 
     if (!lastList.contains(url)) { //new URL -> count 
      newCount++; 
     } 
     Thread.sleep(10); 
    } 
    if (newCount > 0) { //one or more new URLs -> notification 
     NotificationCompat.Builder mBuilder = 
       new NotificationCompat.Builder(BackgroundChecks.this) 
         .setSmallIcon(R.drawable.nclogo) 
         .setContentTitle("Es gibt " + newCount + " neue" + (newCount > 1 ? " Gemeindeblätter" : "s Gemeindeblatt")) 
         .setContentText((goToAmtsblatt == null ? "" : "Hier klicken, um " + (newCount > 1 ? "sie" : "es") + " anzusehen.")) 
         .setAutoCancel(true); 
     //if goTo is set, built the redirct 
     if (goToAmtsblatt != null) { 
      TaskStackBuilder stackBuilder = TaskStackBuilder.create(BackgroundChecks.this); 
      stackBuilder.addParentStack(Class.forName(goToAmtsblatt.getComponent().getClassName())); 
      stackBuilder.addNextIntent(goToAmtsblatt); 
      PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_ONE_SHOT); 
      mBuilder.setContentIntent(resultPendingIntent); 
     } 

     //re-set the retrieved Pdf List 
     SharedPreferences.Editor editor = sharedPref.edit(); 
     editor.putString("retrievedPDFString", Utils.listToString(newList)); 
     editor.commit(); 

     //show the notification 
     NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 
     mNotificationManager.notify(0, mBuilder.build()); 
    } 
} 

public void getAmtstafel(SharedPreferences sharedPref) throws Exception { 
    List<String> lastList = new ArrayList<String>(); 
    List<String> newList; 
    Thread.sleep(1000); 
    lastList = Utils.stringToList(sharedPref.getString("retrievedAmtstafelString", "")); 
    newList = Utils.getUrlsFromHTML(Utils.getHTML("http://www.muckendorf-wipfing.at/6-0-Amtstafel.html")); 
    //count new URLs 
    int newCount = 0; 
    for (String url : newList) { 
     if (!lastList.contains(url)) { //new URL -> count 
      newCount++; 
     } 
     Thread.sleep(10); 
    } 
    if (newCount > 0) { //one or more new URLs -> notification 
     NotificationCompat.Builder mBuilder = 
       new NotificationCompat.Builder(BackgroundChecks.this) 
         .setSmallIcon(R.drawable.nclogo) 
         .setContentTitle("Es gibt " + newCount + " neue" + (newCount > 1 ? " Amtstafel PDFs" : "s Amtstafel PDF")) 
         .setContentText((goToAmtstafel == null ? "" : "Hier klicken, um " + (newCount > 1 ? "sie" : "es") + " anzusehen.")) 
         .setAutoCancel(true); 
     //if goTo is set, built the redirct 
     if (goToAmtstafel != null) { 
      TaskStackBuilder stackBuilder = TaskStackBuilder.create(BackgroundChecks.this); 
      stackBuilder.addParentStack(Class.forName(goToAmtstafel.getComponent().getClassName())); 
      stackBuilder.addNextIntent(goToAmtstafel); 
      PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(1, PendingIntent.FLAG_ONE_SHOT); 
      mBuilder.setContentIntent(resultPendingIntent); 
     } 

     //re-set the retrieved Pdf List 
     SharedPreferences.Editor editor = sharedPref.edit(); 
     editor.putString("retrievedAmtstafelString", Utils.listToString(newList)); 
     editor.commit(); 

     //show the notification 
     NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 
     mNotificationManager.notify(0, mBuilder.build()); 
    } 
} 

public void getAktuelles(SharedPreferences sharedPref) throws Exception { 
    List<News> news = Utils.getNewsFromHTML(Utils.getHTML("http://www.muckendorf-wipfing.at/22-0-Aktuelle+Meldungen.html")); 
    String newNewsString = new ObjectSaver().saveString(news); 
    String oldNewsString = sharedPref.getString("aktuellesList", ""); 
    if(!oldNewsString.equals(newNewsString)) { 
     SharedPreferences.Editor edit = sharedPref.edit(); 
     edit.putString("aktuellesList", newNewsString); 
     edit.commit(); 
    } 
} 

public void getServiceNews(SharedPreferences sharedPref) throws Exception { 
    //retrieve List 
    List<News> serviceList = new ArrayList(); 
    serviceList.add(new News("Müllabfuhr Kalender", Utils.extractContentFromHTML(Utils.getHTML("http://www.muckendorf-wipfing.at/34-0-Muellabfuhr+Kalender.html")))); 
    serviceList.add(new News("SMS-Erinnerung an Müllabfuhr-Termine", "<html><head><meta http-equiv=\"refresh\" content=\"0; URL=http://195.58.166.60/noeav/umweltverbaende/default.asp?portal=verband&vb=tu&kat=5032&op=5002\"></head><body></body></html>")); 
    serviceList.add(new News("Gemeinde- und andere Gebühren", Utils.extractContentFromHTML(Utils.getHTML("http://www.muckendorf-wipfing.at/35-0-Gemeindegebuehren.html")))); 
    serviceList.add(new News("Infos zum Wirtschaftshof, Öffnungszeiten & Preisliste", Utils.extractContentFromHTML(Utils.getHTML("http://www.muckendorf-wipfing.at/36-0-Wirtschaftshof.html")))); 
    //save List to sharedPrefs 
    SharedPreferences.Editor edit = sharedPref.edit(); 
    edit.putString("serviceList", new ObjectSaver().saveString(serviceList)); 
    edit.commit(); 
} 

}

這裏是MyBroadcastReceiver.class：

public class MyBroadcastReceiver extends BroadcastReceiver { 
@Override 
public void onReceive(Context context, Intent intent) { 
    Intent startServiceIntent = new Intent(context, BackgroundChecks.class); 
    startServiceIntent.putExtra("notificationActivityAmtsblatt", AmtsblattActivity.class.getName()); 
    startServiceIntent.putExtra("notificationActivityAmtstafel", AmtsblattActivity.class.getName()); 
    context.startService(startServiceIntent); 
} 
} 

所以我的問題是： 誰能幫助我在這裏得到這個代碼工作，可以顯示多個通知？謝謝！

Answer 1

mNotificationManager.notify(0, mBuilder.build()); 

生成ID爲0的通知。每次使用ID調用notify時，都會用該ID覆蓋當前通知。

解決方案：使用一個唯一的ID爲您的新通知

mNotificationManager.notify(getUniqueID(), mBuilder.build());