How to handle exiting Android app?

Question

I found a couple of places that suggest System.exit(0), but then I read a couple of places that this is bad practice, since android handles closing an application for you.

My issue is, I have an auto logout function that takes users back to the login page, BUT I'm wondering what's in memory at this time. Do I have to have a de-constructor setup to set my values to null when activities change or do objects automatically get nulled out between activity changes?

Answer 1

You can use Activity#finish() when you're done with any Activities. For example, when the auto-logout occurs, call finish() on any open Activities.

https://developer.android.com/reference/android/app/Activity.html#finish()