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➨ https://www.youtube.com/watch?v=aWGGZCOHZ1k
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This Android Tutorial video talks about the Android FragmentManager and the backstack to which FragmentTransactions can be added as FragmentManager.BackStackEntry objects. It talks about the default behavior of how Fragments are destroyed if not added to the BackStack. This video discusses about addToBackStack(), popBackStack() and onBackStackChanged(), getBackStackEntryCount() and getBackStackEntryAt(int index) methods.

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