PendingIntent传值接收时为null

Intent intent = new Intent(context, XXActivity.class);
        intent.putExtra("recFile", recName);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        Notification.Builder builder = new Notification.Builder(context);
        builder.setTicker("新的通知");
        builder.setSmallIcon(R.drawable.ic_launcher);
        builder.setContentTitle("收到新的通知");
        builder.setContentText("您有一条新的通知");
        builder.setContentIntent(pendingIntent);
        Notification notification = builder.build();
        notification.flags = Notification.FLAG_AUTO_CANCEL;
        manager.notify(NOTIFACTION_FLAG_CODE, notification);

String recFileName = getIntent().getStringExtra("recFile");
if (recFileName != null) {
     //处理逻辑...
   }