android - Closing Android Application and doing tasks in that moment

Question

I have an app which the moment the user starts running the app it register a new entry in a database. The thing is that when the user quits I would like to delete this registry in the database. I know doing al these inserts and deletes with JSON, MySQL and PHP but I dont know how to apply these functions when the user quits the application in the normal way. I would like to know if there is a function like public onBackPressed() where it does always the same thing but you can overwrite it.

Thanks

Answer 1

有一个 onDestroy() 方法，当用户完成应用程序并释放资源时调用它，你可以在你的活动中覆盖它并做你想做的任何事情，如果你想从 onDestroy() 上一步它是 onStop () 当活动进入后台等时调用。您也可以覆盖它。

Answer 2

使用 Android 的 onBackPressed() 方法并删除超级调用并执行所有操作，在最后阶段，编写 finish()，这将关闭您的应用程序。

这仅在您的其他活动关闭时才有效，否则它将关闭当前活动并转到最后一个活动。