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Compared with the example of electric lights, file uploading differs in that it will now face more complicated conditional switching relationships. In the example of an electric lamp, the state of the electric lamp is always from off to on and then to off, or from off to low light, low light to strong light, strong light to off. ABCA always seems to follow the rules, so even if you don't use the state mode to write the light program, but use the original if, else to control the state switching, you won't lose yourself in logic writing, because the state switching always follows some simple rules.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.同样悲伤的情形，也在清南村其他人家上演。周菡瞪大眼睛问道：为何？秦淼白了她一眼，道：人家昨天成亲，大喜的日子，怎么能杀人呢，这不好。小驯鹿尼科梦想着能和从未相见的驯鹿爸爸一样成为会飞的圣诞驯鹿。尽管有很严重的眩晕，尼科还是每天偷偷溜出它所住的山谷，花大部分时间向罕见的芬兰飞行松鼠家族成员Julius学习飞行课。杨长帆赶紧说道，后面有三百狼兵，他们进城，绍兴就完了。