How to properly implement onDestroy method?

I'm developing an android application and i'm almost done, and in order to have a good application i wanted to know how to properly 开发者_JAVA百科implement the onDestroy method, i mean do i have to call the garbage collector or set everything to null?

thanks in advance..

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If you have a database opened,or a opened cursor you can close them in onDestroy() method.System will automatically call gc when it is necessary.

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On Destroy method you can set null all and System.gc() for garbage collector,,,,,Mind that its not neccesary to set null Because java has this feature to null object using garbage collector..........