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When 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.该剧讲述了一位少女漫画家为了突破创作瓶颈，主动接近高冷教授来获取创作素材，最终收获命定爱情的故事。Command mode belongs to the behavior mode of an object. Command mode encapsulates a request or operation into an object, and separates the responsibility of issuing the command from the responsibility of executing the command through abstraction of the command. The implementation of command mode can provide the functions of revocation and recovery of commands. The specific structure diagram is shown below.A2. 1.10 Spinal examination.1937年12月13日，时为国民政府首都的南京城沦陷，部分官员弃城逃亡，但仍有许多官兵留守，誓死保卫这个大厦将倾的城池。"Biomechanical Analysis of Snatch Techniques of Elite Female Weightlifters in China" Academic Paper