From a7f7ca931e781ea8f2aaf1dd4f437170c387b282 Mon Sep 17 00:00:00 2001
From: Colin Tucker <ctucker@thinkrite.com>
Date: Tue, 4 Jul 2017 09:44:10 -0400
Subject: [PATCH] Fix a NPE crash when onUpdateScrollbar() is called before
 adapter is initialized.

---
 .../fastscrollrecyclerview/FastScrollRecyclerView.java         | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/library/src/main/java/com/jaredrummler/fastscrollrecyclerview/FastScrollRecyclerView.java b/library/src/main/java/com/jaredrummler/fastscrollrecyclerview/FastScrollRecyclerView.java
index 6541b0c..7ec94bc 100644
--- a/library/src/main/java/com/jaredrummler/fastscrollrecyclerview/FastScrollRecyclerView.java
+++ b/library/src/main/java/com/jaredrummler/fastscrollrecyclerview/FastScrollRecyclerView.java
@@ -340,6 +340,9 @@ public String scrollToPositionAtProgress(float touchFraction) {
    * <p>Override in each subclass of this base class.</p>
    */
   public void onUpdateScrollbar(int dy) {
+    if (getAdapter() == null) {
+      return;
+    }
     int rowCount = getAdapter().getItemCount();
     if (getLayoutManager() instanceof GridLayoutManager) {
       int spanCount = ((GridLayoutManager) getLayoutManager()).getSpanCount();