How can I change the view after the state is initialized?

[6iovan]

Hello! :smile:

I want to change the view multiple times, but "XXX was mutated. State classes should be immutable."

thank you.

[elihart]

You must call setState from the ViewModel. The data class should be copied and a new version made.

see the wiki https://github.com/airbnb/MvRx/wiki#core-concepts https://github.com/airbnb/MvRx/wiki#updating-state

[6iovan]

@elihart I did call setState or execute from the ViewModel, but it’s not work when I use epoxy + paging support.

[6iovan]

Thank you for your answer!~

implementation 'com.airbnb.android:mvrx:0.7.2'
implementation 'com.airbnb.android:epoxy:2.19.0'
implementation 'com.airbnb.android:epoxy-paging:2.19.0'

data class LandMainState(
    val historyItemData: Async<List<LandMainAlbum>> = Uninitialized,
    ...
    val albumAllItemData: Async<PagedList<Pair<Album, Album>>> = Uninitialized
) : MvRxState

class LandMainViewModel(state: LandMainState) : MvRxViewModel<LandMainState>(state) {
    fun loadHistoryCards() {
        LandMainLocalDataSource.getHistoryCars()
            .subscribeOn(Schedulers.io())
            .execute { copy(historyItemData = it) }
    }
}

viewModel.asyncSubscribe(this, LandMainViewModel::albumAllItemData) {
    rxController.submitList(it)
}

I call submitList in the Activity#onCreate(), then i want to call loadHistoryCards in the Activity#onResume(). Crash happened..

[6iovan]

I got it, PagedList cannot be used in State.