notification 에 pending intent 를 써서 notification 눌렀을 때 특정 activity를 띄우려고 합니다.
여기까지는 아래처럼 작성해서 성공했습니다.


Notification noti = new Notification(R.drawable.stat_sys_download_anim5, fileTitle, System.currentTimeMillis());
    noti.flags = Notification.FLAG_AUTO_CANCEL;
 
    Intent clickIntent = new Intent(Intent.ACTION_MAIN);

             clickIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
               | Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY
               | Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
             
             clickIntent.addCategory(Intent.CATEGORY_LAUNCHER);
             clickIntent.setComponent(new ComponentName("aaa", "bbb"));          

    noti.contentIntent = PendingIntent.getActivity(getApplicationContext(), 0, clickIntent, 0);