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Let's start from the beginning. MotionEvent.ACTION_DOWN was introduced before. What is mFirstTouchTarget? The following code indicates that when the ViewGroup click event is consumed by the sub-View, the mFirstTouchTarget will point to the sub-View. Therefore, if the event is consumed by the View or is an ACTION_DOWN event, then access the ViewGroup's onInterceptTouchEvent, and if not, it is all intercepted by the current ViewGroup. In other words, if the View decides to intercept events, then this sequence of events will be handled by the View.剧集根据玛格丽特·阿特伍德小说《别名格蕾丝》改编，讲述女佣格蕾丝(莎拉·加顿饰)意外谋杀了雇主，而她却被认定为最臭名昭著的女人之一。Let me explain the role of these classes: MySubject class is our main object, Observer1 and Observer2 are objects that depend on MySubject, and Observer1 and Observer2 must change when MySubject changes. The AbstractSubject class defines a list of objects to be monitored, which can be modified: add or delete monitored objects, and when MySubject changes, it is responsible for notifying the objects that exist in the list. Let's look at the implementation code:《太平洋战争》改编自太平洋战争时期下士伍长Eugene Sledge的回忆录"Marines:With the Old Breed"和一等兵Robert Leckie的回忆录"Helmet for My Pillow"。中途岛战役之后这段历史上。三位主人公将抛头颅洒热血，带着我们一起回顾这段残忍悲壮的战争绝唱。剧集将集中重现卡纳尔岛战役、贝里琉岛战役、硫磺岛战役以及最终登陆冲绳岛，日本投降。He thought he had taken advantage of it, but in fact he had suffered a great loss.　　本片根据英国作家劳伦斯的同名小说改编，获得法国电影恺撒奖5项大奖。