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Additional grouping problemWhen x=3, ViewGroup2 has already blocked the event when x=3. Why did MyView still receive an event? If the action value of this event received by MyView is printed out with log, it is found to be ACTION_CANCEL, which indicates that this event has ended for non-human reasons. Let me give an example of the ACTION_CANCEL event. Generally, when we handle the event, we will record something in the down event and then clear the record in the up event. If you have a Button in ListView, When we hold down the Button, the button receives the down event. At this moment, the finger starts to slide, and the event will be intercepted by ListView. At this time, the button will never receive the up event again. However, when ListView intercepts the event, the button will receive the cancel event, indicating that the event is ended for non-human reasons. Therefore, Cancel can do what the up event wants to do at this time.1. The declared variables are read-only to the outside world. However, values of object types are exported and can be modified. ?国术乃华夏国粹，近代李小龙在世界上树立东方人英雄形象，尔后更有王羽、李连杰将我国武术以电影及多种角度介绍到西方世界，雪洗「东亚病夫」不名之誉。李连杰专擅的“醉拳““醉剑““太极拳““南拳““八卦棍“亦多次获得全大陆总冠军，扬威国际，本片首次揭秘式于众……西根公辉是个平凡的高三生，某天和死党二阶堂路过H大学兽医系，碰到了头戴羽毛、脸画彩妆的怪教授。结果教授不但当场预言：“你以后一定会当兽医！”还硬塞一隻长相可怕的哈士奇幼犬给公辉照顾。从此公辉的家里，除了大姊头三毛猫、暴君大冠鸡，又多了一个新成员：哈士奇犬巧比！大兽医系，在那里遇见了各式各样的大小动物，以及个性千奇百怪的教授和同学。兽医系里有鼠类恐惧症的二阶堂、非洲迷的漆原教授、特异体质的菱沼学姊，还有英国绅士的菅原教授…就这样公辉、巧比与愉快的伙伴们，展开了熙攘喧闹的校园生活！Organization and Arrangement in MDT Meetings