How to use the Facebook Graph Api Cursor-based Pagination

Question

I didn\'t find any help on this topic. The Docs say

Cursor-based pagination is the most efficient method of paging and should always be used where possibl

Answer 1

What I did in my project is basically doing the first call in onSearchClicked() and getting result in onCompleted() callback in ViewModel. If nextRequest is null, I return the list of results back to my fragment, if not, I do the next call, until the end is reached (nextRequest == null). Then, the accumulated list is returned to the fragment.

class SearchViewModel() : GraphRequest.Callback {

    private var allPlaces = arrayListOf()

    fun onSearchClicked(location: Location) {
      val request = GraphRequest.newGraphPathRequest(accessToken, "/search", this)
      request.parameters = parameters
      request.executeAsync()
    }

    override fun onCompleted(response: GraphResponse?) {
      if (response != null) {
        allPlaces.addAll(response.data)

        val nextRequest = response.getRequestForPagedResults(GraphResponse.PagingDirection.NEXT)
        if (nextRequest == null) {
            uiEvent.value = ShowPlaces(allPlaces)
        } else {
            nextRequest.callback = this
            nextRequest.executeAsync()
        }
    } else {
        Log.e(TAG, "Search response is null.")
    }
}