Update

app/src/main/java/com/hippo/util/LayoutManagerUtils.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2015 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.util;
+
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.StaggeredGridLayoutManager;
+
+public final class LayoutManagerUtils {
+
+    public static void scrollToPositionWithOffset(
+            RecyclerView.LayoutManager layoutManager,int position, int offset) {
+        if (layoutManager instanceof LinearLayoutManager) {
+            ((LinearLayoutManager) layoutManager).scrollToPositionWithOffset(position, offset);
+        } else if (layoutManager instanceof StaggeredGridLayoutManager) {
+            ((StaggeredGridLayoutManager) layoutManager).scrollToPositionWithOffset(position, offset);
+        } else {
+            throw new IllegalStateException("Can't do scrollToPositionWithOffset for " +
+                    layoutManager.getClass().getName());
+        }
+    }
+}