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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.现在，Ura back在厌倦了此类SNS的人们中很受欢迎！该剧讲述了蓝水市大家族林家神秘案件接连发生，探长柯阳受命调查，却无意发现一系列案件背后有着不为人知的真相的故事。该剧改编自天下霸唱小说《鬼吹灯之怒晴湘西》，民国年间，军阀混战，民不聊生。陈玉楼乃卸岭魁首。他联手军阀罗老歪，入湘西瓶山探秘元墓。途遇搬山道人鹧鸪哨。搬山历来不为财物，只为寻找解除族人诅咒的雮尘珠。为了进入这座从未被人染指的神秘大墓，搬山、卸岭两大派在此结盟。Some timing operations on data no longer rely on external programs, but directly use the functions provided by the database itself.