如何在单个通知图标中显示android中的多个通知？

Question

我的应用会在上传文档并成功上传时发布通知。如果发布多个文档上传，它会在android通知栏上发布一系列应用图标。

private void updateNotification(String title, String fileId) {

    Log.v(TAG, "Updating notification for '" + fileId + "' with content: '" + title + "'");

    ApplicationSettings applicationSettings = new ApplicationSettings(mContext);

    NotificationManager notifyManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
    NotificationCompat.Builder builder = new NotificationCompat.Builder(mContext);
    builder.setContentTitle(title)
            .setContentText(fileId)
            .setSubText(applicationSettings.getAccountEmail())
            .setSmallIcon(R.drawable.upload_notification);

    // Issue the notification
    notifyManager.notify(fileId.hashCode() /*notificationId*/, builder.build());
}

如何在一个通知图标下将我在Android中的所有应用通知分组？

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