CODEWITHSUNDEEP
javaandroid
Chris
Chris

Reputation: 808

Android force Stop callback to application?

If an app is forced stop by following the steps Settings->Application->ManageApplications -> --> Force Stop , Does android call the onDestroy of the Activity or the Application ? (If not , Is there any way to know if the application has died due to a force Stop triggered by the User ) .

Upvotes: 8

Views: 15544

Answers (3)

Alex Lockwood
Alex Lockwood

Reputation: 83303

Force stopping the app will kill the entire process (i.e. with Process.killProcess(int pid)). All resources associated with the application will be removed and freed by the kernel. So no, there is no way that you can intercept this action.

When you release your application on the market, the developer console will provide you with stats regarding force closes, crashes, etc. (if that is why you are asking).

Upvotes: 14

Mxyk
Mxyk

Reputation: 10698

In short, no, onDestroy() is not called, and you can't do this. Android doesn't support it.

A more extended answer...

onDestroy() does not appear to be called in this scenario. I tested this by attempting to have it Toast me before calling super.onDestroy, but the Toast message never showed up. (And according to this post, onDestroy() is really unreliable and won't be called often, if at all, on phones, whereas it may be called on an emulator - so be aware of that). Instead killProcess() is called, and we cannot intercept that.

In addition, according to the accepted answer in this post, it appears we can't even catch and perform tasks after a user-controlled force stop.

Upvotes: 5

Falmarri
Falmarri

Reputation: 48559

No. This isn't really possible. I haven't looked at the Android code in question, but I would imagine that "force stop" is just calling kill on the process ID of your app. So the only way you could intercept that is if you could trap signals, which I don't think Android allows.

If you were rooted, you could possibly do this, but not in any standard way.

Upvotes: 0

Related Questions