轉載請註明出處　http://blog.csdn.net/qq_31715429/article/details/50978587 
本文出自：猴菇先生的部落格

(1).推送多條手機全能接收，但是隻顯示一條通知，後一條會頂掉前一條，最後只顯示一條最新的notification

    Intent intent = new Intent(context, MainActivity.class);
    intent.putExtra(PUSH_CLASSID,pushBean.getClassId());
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent,
            PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.BigTextStyle bigTextStyle = new NotificationCompat.BigTextStyle();
    bigTextStyle.setBigContentTitle(title);
    bigTextStyle.bigText(content);

    Notification nc = new NotificationCompat.Builder(context)
            .setDefaults(Notification.DEFAULT_ALL)
            .setTicker(content)
            .setContentTitle(title)
            .setContentText(content)
            .setAutoCancel(true)
            .setSmallIcon(R.drawable.ic_launcher)
            .setContentIntent(pendingintent)
            .setStyle(bigTextStyle)
            .build();
    NotificationManager nm = (NotificationManager) context.getSystemService(Service.NOTIFICATION_SERVICE);
    nm.notify(id,nc);
 

最後的原因是nm.notify(id, nc)中的id是一個固定值，需要定義一個變數 
public int id = 0; 
然後修改nm.notify(id++, nc);這樣就會顯示多條推送。

(2). 還有一個問題，就是雖然會顯示多條推送，但是點選最早的前幾條條推送，如果彈窗的話，顯示的總是最新的那條資料資訊 
關鍵在這：

PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

• 這個方法的第二個引數應該是對應不同的推送的id，把這個值改成不同的值，以對應不同的推送資訊，就可以顯示不同的資訊。本來想的是每次推送生成一個唯一值，比如System.currentTimeMillis()或者UUID.randomUUID(),但是考慮到PendingIntent.getActivity方法第二個引數需要int值，怕出現型別轉換異常，後來改用SharedPreference在本地記錄一個int值，每次接收推送時get一下,再++一下，接收完再put一下。

private void sendNotification(Bundle bundle, GetFirebaseMessageNotificationResponse notification) {
    ++NOTIFY_ID;
    if (bundle != null) {
        AnalyticsUtil.getInstance().facebookEventLogger(AppConstant.AnalyticEvent.NOTIFICATION_MESSAGE_SHOW, "type", bundle.getString("type"));
    }
    Intent intent = new Intent(this, WelcomeActivity.class);
    intent.putExtras(bundle);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    intent.putExtra(AppConstant.ActivityBundle.NOTIFICATION_LAUNCH_TO_WELCOME, true);
    intent.putExtra(AppConstant.Common.IntentKey.FROM_NOTIFICATION, AppConstant.Common.FROM_NOTIFICATION_KEY);
    if (notification != null) {
        intent.putExtra(AppConstant.Common.IntentKey.FROM_NOTIFICATION_CONTENT, notification.getContent());
    }
    PendingIntent pendingIntent = PendingIntent.getActivity(this, NOTIFY_ID /* Request code */, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
            .setSmallIcon(R.drawable.icon_logo_white).
                    setContentTitle(notification.getTitle())
            .setContentText(notification.getContent()).setAutoCancel(true)
            .setSound(defaultSoundUri).setContentIntent(pendingIntent);
    Bitmap bm = BitmapFactory.decodeResource(CCApplication.getInstance().getResources(), R.mipmap.monkey_icon);
    notificationBuilder.setLargeIcon(bm);

    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(NOTIFY_ID /* ID of notification */, notificationBuilder.build());
}