问题描述
我说的是在Android的程序。的
在早期的日子里,我认为,完成()
的关闭当前的活动的并返回到previous在活动栈, System.exit(0)
的关闭整个应用程序的。
In early days I thought that, finish()
closes current activity and go back to the previous in Activity stack, and System.exit(0)
closes the whole application.
但我错了。我做了一个小实验,了解,双方将结束只有当前活动
But I was wrong.I made a small experiment and understood that Both will finish only the current Activity.
这是我能看到的唯一的区别是,在安卓2.3.3
The only differences that I could notice is that, in Android 2.3.3
- 在 ActivityResult 传播回
onActivityResult()
使用完成()
。而onActivityResult()
不要求System.exit(0)
。
- The ActivityResult is propagated back to
onActivityResult()
usingfinish()
. WhereasonActivityResult()
not called forSystem.exit(0)
.
但在Android的4.2.2,onActivityResult()被调用这两个!和意图是出境空()。(我在这两个设备只测试)
But in Android 4.2.2, onActivityResult() is called for both! and Intent was null for exit().(I tested only in these 2 devices)
- 在这里使用的exit(),而
完成()
是更快。(好像更多的后台操作是否有在退出的时候是一个时间滞后())
- There is a time lag when using exit() whereas
finish()
is faster.(seems like more background operations are there in exit())
因此,
-
什么是两者之间的区别?
what's the difference between two?
在哪些情况下,我可以使用退出()?
In which situations, I can use exit()?
我相信还有更多的东西是我的两种方法之间缺少研究。希望有人能解释更多指正。
I believe there is something more that I'm missing in between the two methods.Hope somebody can Explain more and correct me.
感谢
编辑致函索取:
请一个Android应用程序有2个活动。使用意图从启动活动调用次活动。现在,第二个活动里,在点击一个按钮,叫 System.exit(0)
。的虚拟机停止进一步执行,程序将退出。的????(据documentation)
Make an Android application with 2 Activities. Call second Activity from Launcher activity using Intent. Now, inside the second activity, upon a button click, call System.exit(0);
."The VM stops further execution and program will exit."????(according to documentation)
我看到第一个在那里的活动。为什么?(欢迎您来证明我错了/我是正确的)
I see first activity there. Why?(You are welcome to prove that I'm wrong/ I was right)
推荐答案
据Android开发 -
According to android Developer -
完成()
打电话当你的活动已经完成,应该关闭。该 ActivityResult传播回谁通过推出您 onActivityResult()。
System.exit(0)
虚拟机停止进一步执行,程序将退出。
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