什么时候不调用 onRestoreInstanceState？

Question

Docs describes when onRestoreInstanceState IS called:

This method is called after onStart() when the activity is being re-initialized from a previously saved state, given here in savedInstanceState. (...) This method is called between onStart() and onPostCreate(Bundle) . This method is called only when recreating an activity; the method isn't invoked if onStart() is called for any other reason .

I'm super curious what does " onStart() is called for any other reason " mean in context of onRestoreInstanceState ?

Answer 1

The normal lifecycle of an Activity looks like this:

• onCreate()
• .
• onStart()
• onResume()
• onPause()
• onStop()
• .
• onDestroy()

The lifecycle callbacks between onStart() and onStop() can occur over and over again if the Activity is completely obscured by another Activity . In this case, onStop() is called when the Activity is completely obscured by another Activity . When the Activity is made visible again, onStart() will be called without onRestoreInstanceState() being called because the Activity is not being recreated.