Notification noti = new Notification.Builder(this)
.setContentTitle("标题名称")
.setContentText("标题里的内容")
.setSmallIcon(R.drawable.new_mail)
.setLargeIcon(BitmapFactory.decordResource(getResources(), R.drawable.ic_launcher))
.build();

NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
nm.notify(0, noti);

Notification notification = new Notification(R.drawable.ic_launcher, "xxxxxx", System.currentTimeMillis());
//点击事件真正想执行的动作
Intent intent = new Intent();
intent.setAction(Intent.ACTION_DIAL);
intent.setData(Uri.parse("tel:110"));
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
notification.setLatestEventInfo(this, "标题", "内容", contentIntent);
NotificationManager nm = (NotificationManager) getSystemManager(NOTIFICATION_SERVICE);
nm.notify(0, notification);