Recreate views on config changes

[hansonchris]

This is typically necessary when the Activity has specified in the manifest that it will handle configuration changes such as an orientation change.

If the top Controller.setRecreateViewOnConfigChange(true) has been called before a configuration change happens, that Controller's current view will be removed and a recreated view will be added to the parent.

For Controllers that are lower in the stack, those Controllers' view will only be recreated if the Controller also has a RetainViewMode of RetainViewMode#RETAIN_DETACH.

[hansonchris]

@EricKuck would you mind taking a look at this when you have a chance?

[hansonchris]

Rebased, resolved conflicts, was bee8128

[hansonchris]

Rebased, resolved conflicts, was 90b7add

[EricKuck]

Recreating views on all config changes seems a little heavy-handed, doesn't it? I can see people potentially wanting to do this for landscape -> portrait, but what if they don't want to recreate views for keyboard availability events or multi-window changes?

[Tagakov]

Maybe it is reasonable to allow user to pass predicate which would filter appropriate configchanges for view hierarchy recreation? Approach with view hierarchy recreation without destroying activity seems very usable

[Tagakov]

Or maybe it would be better to just add recreateViews() method to router allowing users to invoke it in Activity::onConfigurationChanged?

[Tagakov]

ping?

[CebotariM]

Any updates on this?