快速寫法: mHandler.sendMessage(mHandler. obtainMessage (MSG_ADD_TO_PLAYLIST, intent)); 其內部其實就是: public final Message obtainMessage(int what, Object obj) { return Message.obtain(this, what, obj); } public static Message obtain(Handler h, int what, Object obj) { Message m = obtain(); m.target = h; m.what = what; m.obj = obj; return m; }