What is the difference between onCreateOptionsMenu(Menu menu) and onPrepareOptionsMenu(Menu menu)?
onCreateOptionsMenu()
is called once.onPrepareOptionsMenu()
is called every time the menu opens.
From the onCreateOptionsMenu()
documentation:
This is only called once, the first time the options menu is displayed. To update the menu every time it is displayed, see
onPrepareOptionsMenu(Menu)
.