Android same method called twice

Question

I have a method that runs when the app is opened. It is called from onCreate. But I also call it from onResume. The problem I have is that at the moment it is running twice when the app opens. Is there a way to stop this or a better way to implement what I am trying to achieve?

Thanks

Answer 1

When an activity starts, onCreate() is called first and then onResume() is called,if you want it to be called only once, remove the call in onCreate() .

calling the method in onResume() will ensure that the method is called when the activity regains focus, like after back press etc..

Answer 2

Why not to use it only in onResume()? It IS called after onCreate anyway.

viz. http://developer.android.com/reference/android/app/Activity.html#ActivityLifecycle

Answer 3

Activity lifecycle needed steps:

Want to Start the Activity?

Activity Starts => onCreate() => onStart() => onResume() => Activity is running

Want to shut it down?

Running => onPause() => onStop() =>onDestroy() => Activity is finally shut down.

I recomend you to read this article of the official documentation: Activity