luciofm

public class Pager<I, O> {

    private static final Observable FINISH_SEQUENCE = Observable.never();

    private PublishSubject<Observable<I>> pages;
    private Observable<I> nextPage = finish();
    private Subscription subscription = Subscriptions.empty();

    private final PagingFunction<I> pagingFunction;
    private final Func1<I, O> pageTransformer;

luciofm

     E  Process: org.lucasr.twowayview.sample, PID: 7606
     E  java.lang.NullPointerException: Attempt to read from field 'int org.lucasr.twowayview.widget.TWSpannableGridLayoutManager$SpannableItemEntry.rowSpan' on a
         null object reference
     E      at org.lucasr.twowayview.widget.TWSpannableGridLayoutManager$SpannableItemEntry.access$100(TWSpannableGridLayoutManager.java:40)
     E      at org.lucasr.twowayview.widget.TWSpannableGridLayoutManager.getFirstChildCountInLanes(TWSpannableGridLayoutManager.java:223)
     E      at org.lucasr.twowayview.widget.TWSpannableGridLayoutManager.moveLayoutToPosition(TWSpannableGridLayoutManager.java:262)
     E      at org.lucasr.twowayview.widget.TWLanedLayoutManager.onLayoutChildren(TWLanedLayoutManager.java:236)
     E      at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:1461)
     E      at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:1600)
     E      at android.view.View.layout(View.java:15273)

luciofm

diff --git a/library/src/main/java/org/lucasr/twowayview/TWSpannableGridLayoutManager.java b/library/src/main/java/org/lucasr/twowayview/TWSpannableGridLayoutManager.java
index e631060..d6956ff 100644
--- a/library/src/main/java/org/lucasr/twowayview/TWSpannableGridLayoutManager.java
+++ b/library/src/main/java/org/lucasr/twowayview/TWSpannableGridLayoutManager.java
@@ -218,6 +218,8 @@ public class TWSpannableGridLayoutManager extends TWGridLayoutManager {
         int childCount = 0, i = 0;
         while (i < itemCount && i < laneCount) {
             SpannableItemEntry entry = (SpannableItemEntry) getItemEntryForPosition(i);
+            if (entry == null)
+                break;