diff --git a/app/src/main/res/layout/activity_issues.xml b/app/src/main/res/layout/activity_issues.xml
index d214364..0b14fc3 100644
--- a/app/src/main/res/layout/activity_issues.xml
+++ b/app/src/main/res/layout/activity_issues.xml
@@ -12,7 +12,7 @@
         android:text="显示dialog"
         android:onClick="onTestClick" />
 
-    <android.support.v7.widget.RecyclerView
+    <com.dnwalter.formlayoutmanager.view.HVSingleRecylerView
         android:id="@+id/recycler_view"
         android:layout_width="match_parent"
         android:layout_height="250dp"
diff --git a/formlayoutmanager/src/main/java/com/dnwalter/formlayoutmanager/view/HVSingleRecylerView.java b/formlayoutmanager/src/main/java/com/dnwalter/formlayoutmanager/view/HVSingleRecylerView.java
index aa2d67c..f7c09bb 100644
--- a/formlayoutmanager/src/main/java/com/dnwalter/formlayoutmanager/view/HVSingleRecylerView.java
+++ b/formlayoutmanager/src/main/java/com/dnwalter/formlayoutmanager/view/HVSingleRecylerView.java
@@ -83,4 +83,58 @@ public boolean fling(int velocityX, int velocityY) {
         }
         return super.fling(velocityX, velocityY);
     }
+
+    @Override
+    public int computeHorizontalScrollOffset() {
+        if (getLayoutManager() == null) {
+            return 0;
+        } else {
+            return getLayoutManager().computeHorizontalScrollOffset(new RecyclerView.State());
+        }
+    }
+
+    @Override
+    public int computeHorizontalScrollExtent() {
+        if (getLayoutManager() == null) {
+            return 0;
+        } else {
+            return getLayoutManager().computeHorizontalScrollExtent(new RecyclerView.State());
+        }
+    }
+
+    @Override
+    public int computeHorizontalScrollRange() {
+        if (getLayoutManager() == null) {
+            return 0;
+        } else {
+            return getLayoutManager().computeHorizontalScrollRange(new RecyclerView.State());
+        }
+    }
+
+    @Override
+    public int computeVerticalScrollOffset() {
+        if (getLayoutManager() == null) {
+            return 0;
+        } else {
+            return getLayoutManager().computeVerticalScrollOffset(new RecyclerView.State());
+        }
+    }
+
+    @Override
+    public int computeVerticalScrollExtent() {
+        if (getLayoutManager() == null) {
+            return 0;
+        } else {
+            return getLayoutManager().computeVerticalScrollExtent(new RecyclerView.State());
+        }
+    }
+
+    @Override
+    public int computeVerticalScrollRange() {
+        if (getLayoutManager() == null) {
+            return 0;
+        } else {
+            return getLayoutManager().computeVerticalScrollRange(new RecyclerView.State());
+        }
+    }
 }