ActionBar 'up' button destroys parent activity, 'back' does not

Question

I have a relatively simple Android app with one Activity showing a list of items and another showing details of a selected item. I start the list activity, whi

Answer 1

when you specify parent activity in manifest then it gets restarted when you click on up Navigation button in action bar.

check this i already answered this question

https://stackoverflow.com/a/32401235/3479012

you need to override up nevigation button in actionbar by accessing it by android.R.id.home in onOptionsItemSelected and do finish top activity.