android - File.deleteOnExit - Unix trick from comments -


here's source comment method:

note on android, application lifecycle not include vm termination, calling method not ensure files deleted. instead, should use appropriate out of:

 * use {@code finally} clause manually invoke {@link #delete}.  * maintain own set of files delete, , process @ appropriate point     in application's lifecycle.  * use unix trick of deleting file readers , writers have    opened it. no new readers/writers able access file, existing    ones still have access until last 1 closes file.

can explain me "unix trick" mentioned in , how use it?

this answer has explanation: https://stackoverflow.com/a/5219960/200508. basically, means "deleting" file on unix system doesn't erase disk; instead, deletes reference file directory it's in. file isn't erased until processes using terminate. thus, can open temporary file , delete it, , whenever program terminates automatically erased.


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