[android-developers] destruction and creation of android activity happens TWICE upon changing the screen orientation

Scenario 1 - NORMAL

###################### application activity started ###########################

03-31 17:52:18.413: INFO/System.out(589): onCreate()

03-31 17:52:18.974: INFO/System.out(589): onWindowFocusChanged() -> hasFocus:true

03-31 17:52:18.974: INFO/System.out(589): mySoundPlaybackMethods()

########## back button pressed to remove activity from the task ###############

03-31 17:54:54.113: INFO/System.out(589): onWindowFocusChanged() -> hasFocus:false

03-31 17:54:54.514: INFO/System.out(589): onDestroy()

###################### application activity finished ##########################

Scenario 2 - ABNORMAL

######################## application activity started ##########################

03-31 17:52:18.413: INFO/System.out(589): onCreate()

03-31 17:52:18.974: INFO/System.out(589): onWindowFocusChanged() -> hasFocus:true

03-31 17:52:18.974: INFO/System.out(589): mySoundPlaybackMethods()

########################### screen orientation changed #########################

03-31 17:52:38.393: INFO/System.out(589): onSaveInstanceState() -> state saved

03-31 17:52:38.403: INFO/System.out(589): onDestroy()

03-31 17:52:38.514: INFO/System.out(589): onCreate()

03-31 17:52:39.464: INFO/System.out(589): onRestoreInstanceState() -> state restored from old bundle

---------------------------------------------------------------------------------------------------------------

?????? in the following output, why should the same steps of destruction/creation of activity happen ONCE AGAIN ??????

---------------------------------------------------------------------------------------------------------------

03-31 17:52:39.504: INFO/System.out(589): onSaveInstanceState() -> state saved

03-31 17:52:39.504: INFO/System.out(589): onDestroy()

03-31 17:52:39.524: INFO/System.out(589): onCreate()

03-31 17:52:40.024: INFO/System.out(589): onRestoreInstanceState -> state restored from old bundle

03-31 17:52:40.104: INFO/System.out(589): onWindowFocusChanged() -> hasFocus:true

---------------------------------------------------------------------------------------------------------------

???? the last call to onWindowFocusChanged() occured with hasFocus=TRUE; 

???? this call to to onWindowFocusChanged() also occured with hasFocus=TRUE;

???? when did the windowFocus even change to FALSE?

---------------------------------------------------------------------------------------------------------------

03-31 17:52:40.104: INFO/System.out(589): mySoundPlaybackMethods()

############## back button pressed to remove activity from the task ################

03-31 17:54:54.113: INFO/System.out(589): onWindowFocusChanged() -> hasFocus:false

03-31 17:54:54.514: INFO/System.out(589): onDestroy()

######################### application activity finished ############################

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