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In the system, how do we need to reuse an object, if we repeatedly use the new operator to create the object at this time, it is a great waste of system resources. Since we use the same object every time, why can't we share it? This is also the reason why the model of enjoying yuan appears.In the source code, MotionEvent is a click event, and the distribution of click events is the distribution and delivery process of MotionEvent objects.(2) Purposeful practice is focused只怕要找一条地缝钻进去。An event can have many listeners attached to it. These listeners tell the system to call my XXX method when the event occurs by registering their own event handling routines.Yayao Town is located in Huadu District of Guangzhou City. People's living standard is still a long way from a well-off society. Their cultural level is not high. The education of young people is not perfect enough. The popularization and education of the masses are carried out slowly. Large areas of wasteland in the town have yet to be developed. All kinds of factories and enterprises are relatively small, but the infrastructure construction in the town has made necessary achievements. People's lives are still relatively stable, and everything needs to be developed and perfected in the construction work.