如何设置onBackButton监听到活动 [英] How to set onBackButton listener to an activity

问题描述

我有一个通过 startActivityForResult 通过传递意图来运行活动的一类。在其他类中，可以说，BI得到这个意图和它重新创建活动。我怎么能听事件的活动，例如，这是开始为结果活动运行和用户pressed后退按钮，所以我想要做一些动作。 我怎样才能做到这一点？ 感谢您在前进。

I have a Class A which runs activity via startActivityForResult by passing Intent to it. In other class, lets say B I get this Intent and recreate activity by it. How can I listen events for that activity, e.g. activity which was started for result is running and user pressed "back" button so I want to do some action. How can I do this? Thank you on advance.

活动中，我重新创建对象的实例，不是从活动类派生的。这只是活动。所以我只有对象。有没有办法做这样的东西与实例类，但不是一个班的？

Activity in which i recreate instance of object is not derived from Activity class. It is just ACTIVITY. So I have only object. is there any way to do such stuff with instance of class but not a class?

推荐答案

您应该覆盖的方法：<一href="http://developer.android.com/reference/android/app/Activity.html#onBack$p$pssed%28%29"><$c$c>onBack$p$pssed()在活动的类。

You should override the method : onBackPressed() of the Activity class.

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