android使用finish()和System.exit()退出应用程序的理解

最新推荐文章于 2025-08-18 19:35:30 发布

转载最新推荐文章于 2025-08-18 19:35:30 发布 · 124 阅读

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原文链接：http://www.cnblogs.com/kevin-wang/archive/2012/02/17/2355694.html

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#移动开发

本文详细解释了Android应用如何在后台运行，并深入探讨了如何正确地让应用退出后台状态，避免误操作导致的应用无法正常退出的问题。通过分析finish()与System.exit(0)的区别，提供了一种理解Android应用生命周期管理的有效途径。

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this.finish() in Activity only stop and destroy this activity, application still staying background (check by hold HOME button)
I used:
System.exit(0);
but it still appear there!
That's how Android works. The user/developer is not given any way to actually exit the application. When you call 'finish', the application stack is just pushed to the background. It still exists in the memory. Android itself decides when to close the application(i.e. remove its instance from the memory) and generally this is done when your application becomes the oldest application which was not used for the longest time.

this.finish()主要是对Activity，当前的Activity结束了，但是整个Application还是在内存中运行，此时Application就成为了background进程，System.exit(0)是结束当前进程

转载于:https://www.cnblogs.com/kevin-wang/archive/2012/02/17/2355694.html