How to prevent custom views from losing state across screen orientation changes

Question

I\'ve successfully implemented onRetainNonConfigurationInstance() for my main Activity to save and restore certain critical components across screen orientation

Answer 1

Easy with kotlin

@Parcelize
class MyState(val superSaveState: Parcelable?, val loading: Boolean) : View.BaseSavedState(superSaveState), Parcelable


class MyView : View {

    var loading: Boolean = false

    override fun onSaveInstanceState(): Parcelable? {
        val superState = super.onSaveInstanceState()
        return MyState(superState, loading)
    }

    override fun onRestoreInstanceState(state: Parcelable?) {
        val myState = state as? MyState
        super.onRestoreInstanceState(myState?.superSaveState)

        loading = myState?.loading ?: false
        //redraw
    }
}