public Notification(int icon, CharSequence tickerText, long when) Deprecated. Use Notification.Builder instead.------>使用Notification.Builder（） Constructs a Notification object with the information needed to have a status bar icon without the standard expanded view.
Notification noti = new Notification.Builder(mContext) .setContentTitle("New mail from " + sender.toString()) .setContentText(subject) .setSmallIcon(R.drawable.new_mail) .setLargeIcon(aBitmap) .build();