Menu
I have an activity and i have put checkSelfPermission and requestPermissions methods in onCreate method.
I also have an onRequestPermissionsResult method outside of onCreate.
Finally i have an onResume method, too.
Which one is called first, onResume or onRequestPermissionsResult?
794
onResume() will never be called before onCreate() . Save this answer. Show activity on this post. onResume() will always be called when the activity goes into foreground, but it will never be executed before onCreate() .
onStart() -> called when the activity becomes visible, but might not be in the foreground (e.g. an AlertFragment is on top or any other possible use case). onResume() -> called when the activity is in the foreground, or the user can interact with the Activity. Save this answer.
4. onResume() is called whenever you navigate back to the activity from a call or something else. You can override the onResume method similarly as onCreate() and perform the task.
onStart() , onStop() , onRestart() : Called back when the Activity is starting, stopping and re-starting. onPause() , onResume() : Called when the Activity is leaving the foreground and back to the foreground, can be used to release resources or initialize states.
The correct chain of events is the following:
You call requestPermissions in the Activity's onCreate
requestPermissions start running in another thread, because it is
designed to not block the UI thread. So your activity goes through onStart and then onResume
the request of the permission generates a dialog, which fires onPause on the Activity, because it is no more in foreground position.
The activity at this moment is paused and you can see a dialog asking to allow or deny the permission.
You make your choice, the dialog gets resolved and onResume is called on the Activity.
Also notice that the onPause is fired by the dialog always after onStart and onResume of the Activity, no matter how long it takes to execute the code in them.
And now you can also see why you shouldn't put requestPermissions in onResume.
56
The first one is onRequestPermissionsResult !
I have destroy some object on onPause(), and It will be recreate on onResume(), but I find my onRequestPermissionsResult() operate some destroyed object and caused NullPointEx
30
onResume() will be called first during the launch of your Activity as onRequestPermissionsResult(...) will only be called after user accepts or denies permission to application in Permission request dialog. But onResume again gets called after onRequestPermissionsResult(...) is called to allow your activity to take in account the user choice (granted or denied permission) and execute the code accordingly
2
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
