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RecyclerView scroll listener to AbsListView scroll listener
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| public class RecyclerToListViewScrollListener extends RecyclerView.OnScrollListener { | |
| private final AbsListView.OnScrollListener scrollListener; | |
| private int lastFirstVisible = -1; | |
| private int lastVisibleCount = -1; | |
| private int lastItemCount = -1; | |
| public RecyclerToListViewScrollListener(AbsListView.OnScrollListener scrollListener) { | |
| this.scrollListener = scrollListener; | |
| } | |
| @Override | |
| public void onScrolled(RecyclerView recyclerView, int dx, int dy) { | |
| LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager(); | |
| int firstVisible = layoutManager.findFirstVisibleItemPosition(); | |
| int visibleCount = Math.abs(firstVisible - layoutManager.findLastVisibleItemPosition()); | |
| int itemCount = recyclerView.getAdapter().getItemCount(); | |
| if (firstVisible != lastFirstVisible || visibleCount != lastVisibleCount | |
| || itemCount != lastItemCount) { | |
| scrollListener.onScroll(null, firstVisible, visibleCount, itemCount); | |
| lastFirstVisible = firstVisible; | |
| lastVisibleCount = visibleCount; | |
| lastItemCount = itemCount; | |
| } | |
| } | |
| } |
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