savedInstanceState is always null

Question

This is my savedInstaceState code:

@Override
public void onSaveInstanceState(Bundle savedInstanceState) 
{
    savedInstanceState.putStringArrayList(\"todo_a         


        

Answer 1

https://developer.android.com/guide/topics/manifest/activity-element#lmode

From this you can see 'Similarly, if you navigate up to an activity on the current stack, the behavior is determined by the parent activity's launch mode.' Maybe you are in the 'standard' mode.