Determine if activity/fragment is firstly created or re-created in @AfterViews

[fikr4n]

Description of the feature

Sometimes we need to do something based on whether the activity/fragment is firstly created or re-created (e.g. configuration changes). Usually I check it in onCreate by examining whether the Bundle is null or not. Since in @AfterViews there is no Bundle argument, I have an idea to support such that goal. The code below is just my idea, maybe you have a better idea (or not to accept the idea).

List and usages of the new annotation(s)

No new annotation, only allowing @AfterViews annotated method to have a boolean argument.

    @AfterViews
    void initViews(boolean firstlyCreated) {
        ...
    }

Examples of the generated code

    ...

    private boolean firstlyCreated_;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        ...
        firstlyCreated_ = savedInstanceState == null;
    }

    @Override
    public void onViewChanged(HasViews hasViews) {
        ...
        initViews(firstlyCreated_);
    }

[WonderCsabo]

I agree, this is a valid request. However, i would pass the Bundle instance, not just a boolean. @dodgex WDYT?

[dodgex]

While I see the goal - knowing if an Activity or Fragment is newly created or recreated - as a valid request. I'm not sure if @AfterViews is a good place? but as i don't know a better place i think it is okay.

I think I'd prefer to pass the Bundle too. but we have to ensure to null the reference after all @AfterViews methods have been called. (the sample is missing the change of the boolean)

[fikr4n]

Quoting @dodgex

I think I'd prefer to pass the Bundle too.

Today I found it's a great idea too. When using a library which needs to restore instance state by passing it savedInstanceState I think that I need the Bundle like you said, because I restore the library's component's views in @AfterViews void initViews().