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外观模式在安卓系统中例子 #5

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wusp opened this issue Jan 10, 2017 · 0 comments
Open

外观模式在安卓系统中例子 #5

wusp opened this issue Jan 10, 2017 · 0 comments

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@wusp
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wusp commented Jan 10, 2017

这里的例子选用有问题。
Context-ContextWrapper-Activity 之间不是外观模式
原因在于：
从形式上看，外观模式的Facade一般不会继承自被外观类，以便隐藏原有的接口信息，同时简化本来复杂系统的使用。
从功能上看，Context的子类在持有Context对象的同时动态的为Context添加新的的内容或者改变其中的信息，而完成这种职责的一般是装饰者模式。
综上所述，Context-ContextWrapper-Activity/Application/Service... 这些之间的关系使用的应该是装饰者模式而不是外观模式.
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@wusp