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For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.几个小人物因为一笔钱发生矛盾冲突，导致事态越发严重，最后一发不可收拾。郑府今日已经排开筵席，许多客人上门，见打头的嫁妆担子进来，立即涌上前去观看。The above log has a total of 7 events. Although the log is very long, it is actually very simple. It is mainly divided into two categories: MyView consumed and MyView did not consume. Where x=0, 3, 5 are consumed and the others are not consumed. All events in the distribution process log are the same (as are the down events by default). It is also clear through source analysis why onInterceptTouchEvent () is called every time. The law of the consumption process is also obvious. Events with X=0, 3 and 5 will disappear when consumed, and other events that have not been consumed will be directly transmitted to the top parent View instead of being transmitted back layer by layer.　　该剧改编自J·K·罗琳以“罗伯特·加尔布雷斯”为笔名创作的侦探小说系列，1-3集为《布谷鸟的呼唤》，4、5集为《蚕》。