I'm using PagedListAdapter
and pagedListLiveData
without Room to display a large list of items.
In code below i'm trying to submit adapter to PagedList.
val pagedListLiveData = LivePagedListBuilder(sourceFactory, pagedListConfig)
.setFetchExecutor(Executors.newSingleThreadExecutor())
.build()
val adapter = MyPagedAdapter()
// error below: Type mismatch. Required:Observer<PagedList<MyItem!>!>
pagedListLiveData.observe(lifeCycleOwner, object : Observer<PagedList<MyItem>>() {
override fun onChanged(items: PagedList<MyItem>) {
Log.d(LOG_TAG, "submit PagedList")
adapter.submitList(items)
}
})
Android Studio highlights an error on the expression:
object : Observer<PagedList<MyItem>>
Error: Type mismatch. Required: Observer<PagedList<MyItem!>!>
How to fix it?
Thanks to Kingfisher Phuoc and Jeel Vankhede. Problem was in importing Observer. This code works fine:
pagedListLiveData.observe(lifeCycleOwner, android.arch.lifecycle.Observer{
adapter.submitList(it)
})