Android中的回调? [英] Callback in Android?

问题描述

在Android应用开发中，我经常会在很多地方遇到CallBack这个词.我想知道从技术上告诉我们意味着什么——以及如何设法在应用程序中使用 callback.我需要一个指南来理解和使用它.

In Android application development, I frequently go through the word CallBack in many places. I want to know what it means to tell us technically - and how I can manage to use the callback in applications. I need a guide to understand it and use it.

推荐答案

我想知道这是什么意思，告诉我们在技术上

i want to know what it means, tell us technically

http://en.wikipedia.org/wiki/Callback_%28computer_science%29

在没有函数值参数的面向对象编程语言中，例如Java，可以通过传递一个抽象类或接口来模拟[回调]，其中接收者将调用一个或多个方法，而调用端提供一个具体的实现.这些对象实际上是一组回调，以及它们需要操作的数据.它们在实现各种设计模式(如访问者、观察者和策略)中很有用."

"In object-oriented programming languages without function-valued arguments, such as Java, [callbacks] can be simulated by passing an abstract class or interface, of which the receiver will call one or more methods, while the calling end provides a concrete implementation. Such objects are effectively a bundle of callbacks, plus the data they need to manipulate. They are useful in implementing various design patterns such as Visitor, Observer, and Strategy."

我如何管理回调应用

我不知道这是什么意思.

I have no idea what this means.

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