Android：onResume 总是在 onCreate 之后调用吗？

Question

I need to know if there is ever an instance when onResume will be called before onCreate has been called at least once. Thanks.

Edit: Judging by the activity life cycle, it doesn't seem so. But I want to double check.

Answer 1

onResume() will never be called before onCreate() .

Read more about it in the Activity Lifecycle

Answer 2

onResume()将始终在 Activity 进入前台时被调用，但它永远不会在onCreate()之前执行。

Answer 3

you can refer the website for more details
http://developer.android.com/training/basics/activity-lifecycle/starting.html

Answer 4

I had an issue in which overridden onCreate was not getting called. I tried debugging and logging and i found oncreate not getting called.

Turns out that i override wrong onCreate

@Override
    public void onCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) {
        super.onCreate(savedInstanceState, persistentState);
    }

This is the correct one.

@Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

Posting in the hope that it might help some poor soul. :)

So the correct onCreate() will always get called before onResume

Answer 5

Note: This answer only an additional one to complement the accepted answers .

As previous answers say:

onResume() will never be called before onCreate().

Read more about it in the Activity Lifecycle and Starting an Activity .

Below the complete image of Activity lifecycle including Fragment Lifecycle from android-lifecycle :

Answer 6

the activity has its own lifecycle . just read and look at the nice graph here:

http://developer.android.com/reference/android/app/Activity.html

onResume doesn't suppose to run before onCreate , so you assume correctly .