Distinguish android onStart function in different cases(Rotate or create new activity)

Asked Feb 16 '17 at 08:08

Active Feb 16 '17 at 08:40

Viewed 41 times

I find three cases which will call Android activity onStart() function:

Create a new activity, onStart() will follow behind onCreate
Press home button bring activity background and then bring it forward, it will also call onStart(), and it will follow behind onRestart().
Rotate the screen, the activity will onPause(), onStop(), onDestroy() and then onCreate() and onStart() again.

I want to do some actions in onStart() function in case1 while not do it in case2 or case3, anyone knows how to do it? Any help is appreciated! Thank you！

edited Feb 16 '17 at 08:40

R. Zagórski

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asked Feb 16 '17 at 08:08

newszer

so you want to do some actions only once in the entire lifespan of your activity? – pskink Feb 16 '17 at 08:20
Yes! I find that in onCreate I can detect the bundle is null or not. but it is a not direct way. – newszer Feb 16 '17 at 08:28
just use some static boolean flag to indicate if to do your action or not – pskink Feb 16 '17 at 08:31
I find a way is detect whether the parameter in onCreate is null. – newszer Feb 20 '17 at 01:36

Distinguish android onStart function in different cases(Rotate or create new activity)

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