Android View onSaveInstanceState not called

Question

I am working with CustomView which extends some Android view like FrameLayout. In my layout I use a ViewPager with a custom PagerAdapter.

The problem is that my

Answer 1

The easy answer : it's because I was not setting id to my view (custom or not). Android didn't manage the onSaveInstanceState/onRestoreInstanceState if no id is set to the view.

So as my customView was extending base View, with not extra property, setting an ID to the view solved the issue and so onSaveInstanceState/onRestoreInstanceState are called as it should.

So to summary, use one of this approach :

from XML

OR from Java

yourCustomView.setId(R.id.myCustomView);

is last case, you add static id to res/values/ids.xml