如何检测是否从儿童活动中回来? [英] How to detect if came back from child activity?

问题描述

如何在按下子活动中的后退"按钮后检测活动是否成为焦点，以及如何在那时执行一些代码?

How can I detect if an activity came to focus after pressing the back button from a child activity, and how can I execute some code at that time?

推荐答案

您正在寻找的方法可能是可以在您的母类中实现的onResume方法;).您必须知道onResume在您首次启动任何活动时也被称为.查看活动的生命周期: http://developer.android.com/images/activity_lifecycle.png

The method you're looking for may be the onResume method you can implements in your mother class ;). You must know that the onResume is also called the first time you launch any activity. Look at the lifecycle of an activity : http://developer.android.com/images/activity_lifecycle.png

此致

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