Proposal for additional framework for building single-activity apps.

[terrakok]

Call for suggestions!
What are base classes needed?

• AppActivity: global router, deep-links handler, back button handler
• BaseFragment: clear life-cycle, back button handler
• FlowFragment: nested navigation container, child-parent routers
• BottomNavigationFragment: several FlowFragments with own backstacks, back button handler

[terrakok]

May be it wont be library artifact but will be good topics for Wiki pages. What do you think?

[P1NG2WIN]

I propose to describe these cases on the wiki:

1. deeplink.

Now in all projects on start AS puts a Jetpack Navigation that processes deeplink itself. When dev moving on, he expects this library to do the same. So describe that there is no built-in support, but it is done easily

2. How to work with bottom navigation view and multibackstack.

[nzeeei]

Possible cases for the wiki:

• DialogFragment and BottomSheetFragment of course -_- That work as dialogs (but they're not!);
• Integration with other libraries (Moxy, Toothpick/Dagger/...);
• Different cases when handle deeplinks. E.g. what we do depending on which method is called: onCreate() or onNewIntent(). A lot of people ask about it or don't even know it matters;
• Handling deeplinks in a complex hierarchy of screens: how we might handle them? To pass through bundles, to store in a memory or use anything else?
• Handling insets: what if we want a full-screen SplashFragment? E.g. we create a full screen activity and make fragments handle insets themselves. We can create an open method in the BaseFragment and override it if need:

protected open fun dispatchInsets(v: View, insets: WindowInsets) {}

protected open fun fitSystemWindows(v: View, insets: WindowInsets) {
    v.updatePadding(
        top = insets.systemWindowInsetTop,
        bottom = insets.systemWindowInsetBottom
    )
}

...

override fun dispatchInsets(v: View, insets: WindowInsets): Unit = fitSystemWindows(v, insets)

• Communication between fragment: custom buses (Flow?), built-in ResultBus, targetFragment (really annoying!). Also, how we might jump between stacks in the app with bottom navigation (named bound routers?);

[logoped583st]

Is it possible to avoid using abstractions for framework implementation? I don't think it's quiet good idea because in this case we can't use other frameworks like MOXY and e.t.c.
IMHO General idea seems like Conductor framework and i don't realy like that.

[terrakok]

Yes, I agree with you and wiki documentation looks more useful. I imagine this like cook-book with common cases

[Alvazz]

@terrakok can you give some Cicerone with MvRx's BottomNavigation's demo? thanks a lot.

Airbnb MvRx

[emartynov]

@terrakok what is ETA for the new plans? Asking before own implementation.

[terrakok]

There isn't ETA. Just proposal and open discussion.

[emartynov]

Cool, just adding this to our project:

    if (fragment is BottomSheetDialogFragment) {
      fragment.show(fragmentManager, screen.screenKey)
    } else {
      showFragment(fragment, type, screen, addToBackStack)
    }

Also need to check how will it work with the next fragment.

Let me know when you are open for PR.

[terrakok]

I'm always open for PRs and new ideas.
Will be happy to see your suggestions and discuss about them

[emartynov]

Unfortunately, I failed since BottomSheetDialogFragment never will get in the back stack of the manager. I made a wrapper fragment that shows BSD and closes itself when BSD is fully dismissed.

[terrakok]

Welcome to #139 discussion 🤗