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Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:Extension: From the above analysis, it can be seen that the dispatchTouchEvent () method is called by the parent View, and the child View tells the parent View whether to consume the event through the return value of this method, which is known to all. However, consider a question, Activity-> ViewGroup 1-> ViewGroup 2-> View. If the events are distributed in this order and the View finally consumes the down event, how does Activity know whether the View consumes the event? The process must be like this.The above operation actually adds two mirror axes in the horizontal and vertical directions to the graph.　　在代理团长李八一的帮助下，营长凌凤侠带领女兵们经过残酷战争的洗礼，这群柔弱的女子一个个全成了侠肝义胆的战士。她们打出了军威，打出了同仇敌忾的英雄气势。然而，刚刚从噩梦和身体的伤痛中苏醒过来的家瑜没料到这一切才刚刚开始：原本富甲一方的父亲（李正道）生意惨败一夜失踪；娇生惯养的弟弟（李家兴）留学归来不能适应家族败落，到处惹是生非；母亲（沈芬芳）被害成弱智，生活不能自理；5岁的女儿（贺蕊）惨遭后妈周心妍欺凌、虐待……Q: Will you follow certain steps in the competition?