Activity and Fragment Lifecycles and Orientation Changes

Question

I have been having very odd issues with Fragments and orientation changes that have been causing force closes and not following a logical pattern.

I created

Answer 1

This happens because the activity calls onSaveInstanceState(Bundle) before being destroyed. By default, the activity is saving the states of its fragments in this method.

Later, when the activity is re-created, the old fragments are re-created in the activity onCreate(Bundle savedInstanceState) method.

You might want to check the source code here and here to better understand this behaviour.