private void goUp() {
if (adapter.dataSet.posts != null) {
int position = 0;
int currentOrientation = getResources().getConfiguration().orientation;
RecyclerView.SmoothScroller smoothScroller = null;
if (rv.getLayoutManager() instanceof LinearLayoutManager
&& currentOrientation == Configuration.ORIENTATION_LANDSCAPE) {
position = ((LinearLayoutManager) rv.getLayoutManager()).findFirstVisibleItemPosition();
smoothScroller = new TopSnappedSmoothScroller(rv.getContext(), rv.getLayoutManager());
} else if (rv.getLayoutManager() instanceof CatchStaggeredGridLayoutManager) {
int[] firstVisibleItems = null;
firstVisibleItems =
((CatchStaggeredGridLayoutManager) rv.getLayoutManager())
.findFirstVisibleItemPositions(firstVisibleItems);
if (firstVisibleItems != null && firstVisibleItems.length > 0) {
position = firstVisibleItems[0];
(rv.getLayoutManager())
.smoothScrollToPosition(rv, new RecyclerView.State(), position - 1);
return;
}
} else {
position =
((PreCachingLayoutManager) rv.getLayoutManager())
.findFirstCompletelyVisibleItemPosition();
smoothScroller = new TopSnappedSmoothScroller(rv.getContext(), rv.getLayoutManager());
}
if (smoothScroller != null) {
smoothScroller.setTargetPosition(position - 1);
(rv.getLayoutManager()).startSmoothScroll(smoothScroller);
}
}
}
@Override
public void smoothScrollToPosition(
RecyclerView recyclerView, RecyclerView.State state, int position) {
RecyclerView.SmoothScroller smoothScroller =
new TopSnappedSmoothScroller(recyclerView.getContext());
smoothScroller.setTargetPosition(position);
startSmoothScroll(smoothScroller);
}