Android - 服务 - 使用强制停止时未调用 onDestroy() 方法

Question

When I stop a service using the stop button under the Running Services tab, the method onDestroy() is called.

But when I force stop the application, onDestroy() is never called.

Any explainations about this?

or maybe a solution to fire onDestroy() when force-stopped?

Answer 1

When your force stop an app, exactly that happens - It is Force Stopped. No warning, no callbacks, just stopped. The entire process is killed, and none of the running components (Activities, Services etc) are given any warning.

There is absolutely no guarantee that onDestroy() will be called. Move any application critical code into onPause() , which is called under most circumstances.

Answer 2

From the documentation :

Once the activity is created, onPause() is the last method that's guaranteed to be called before the process can be killed... onStop() and onDestroy() might not be called. Therefore, you should use onPause() to write crucial persistent data (such as user edits) to storage.

To reiterate this point, Force Stop isn't intended to be graceful and exit the app in a caring manner. If you have critical code that must be run each time app finishes you need to run it in onPause() .

Answer 3

When the application gets force stop, Process.killProcess() is called but not onDestroy() function. Go through this link. You will get some idea. Android force Stop callback to application?

Answer 4

I am assuming you have code that you want to execute in onDestroy() referring to your line:

"or maybe a solution to fire onDestroy() when force-stopped?"

The Service method public void onTaskRemoved(Intent rootIntent) is what you are looking for, it will be called when the app is force-stopped.

Answer 5

我知道这是一个老问题，但我遇到了同样的问题，就我而言，我使用的是绑定服务，所以即使在调用stopSelf()之后，Android 也不会调用onDestroy()方法，为了强制它我需要调用unbindService()