扩展实现Parcelable类 [英] Extending a class that implements Parcelable
问题描述
我有一个类，我们把它叫做A级，实现Parcelable。
我有第二类，我们将称之为B类，扩展A级。
我的问题是：
我如何写B类的成员变量的包裹，然后写它的父类的（即：A类的）？成员变量的包裹（以及随后，读取它们）
有一些漂亮的技巧，不需要重写类A的包裹code？或者，我只是需要重写包裹code类A和添加额外的code为B类的成员变量？
我如何写B类的成员变量的包裹，然后写它的父类的（即：A类的）成员变量的包裹
B类重写 writeToParcel（）从A类，链接到父，也加入了自己的对象的包裹。
（以及随后，读取它们）？
B类器具公共静态最终Parcelable.Creator＆LT; MyParcelable＆GT; CREATOR 以这样一种方式，它可以让这两个类阅读他们的东西。如果你创建，需要一个 B类的构造函数的方式包裹作为构造函数的参数，只是连锁超类的构造函数（让A类做的工作），然后阅读B类的数据。
关键是要以同样的顺序做他们两个。如果你打算让A类读取其数据的第一类必须先写它的数据。
有一些漂亮的技巧，不需要重写类A的包裹code？
继承和链接的超类。
I have a class, we'll call it class A, that implements Parcelable.
I have a second class, we'll call it class B, that extends class A.
My question is:
How do I write class B's member variables to the Parcel and then write it's parent class's (ie: class A's) member variables to the Parcel (and, subsequently, read them in)?
Is there some nifty trick to not needing to rewrite class A's Parcel code? Or do I just need to rewrite the Parcel code in class A and add additional code for class B's member variables?
How do I write class B's member variables to the Parcel and then write it's parent class's (ie: class A's) member variables to the Parcel
Class B overrides writeToParcel() from Class A, chaining to the superclass and also adding its own objects to the Parcel.
(and, subsequently, read them in)?
Class B implements public static final Parcelable.Creator<MyParcelable> CREATOR in such a way that it can let both classes read their stuff in. If you take the approach of creating a constructor on Class B that takes a Parcel as a constructor parameter, just chain to the superclass constructor (to let Class A do its work), then read Class B's data.
The key will be to do them both in the same order. If you intend to let Class A read its data first, Class A must write its data first.
Is there some nifty trick to not needing to rewrite class A's Parcel code?
Inheritance and chaining to the superclass.
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