BasePresenter 对BaseView的持有。
Activity承载
知识点插入 泛型通配符?本意就表示符合条件的任意一个对象。比较一下另外一个通配符*，它表示符合条件的所有对象的集合，似乎在Java泛型中没有什么场合需要通配符*。 *lateinit 只用于 var，而 lazy 只用于 val *lazy 应用于单例模式(if-null-then-init-else-return)，而且当且仅当变量被第一次调用的时候，委托方法才会执行。 *lateinit 则用于只能生命周期流程中进行获取或者初始化的变量，比如 Android 的 onCreate()
总结Mvp，首先创建接口（意图）写出来baseview，将想法实现过程就是basepresenter，展示出来承载的baseActivity。
React
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Some thing interesting about web. New door for the world.
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