Update smoothScrollToPosition to move faster for large offsets

Adds a method to AbsListView for translating from position to row
and vice-versa. Doesn't NPE this time.

BUG: 3434554
Change-Id: I6a731aedda6d951ad46322dbe87df00b8d34a22c

1 files changed, 10 insertions, 0 deletions

diff --git a/core/java/android/widget/GridView.java b/core/java/android/widget/GridView.java
index acd711d61e8c..0b424f72be21 100644
--- a/core/java/android/widget/GridView.java
+++ b/core/java/android/widget/GridView.java
@@ -1027,6 +1027,16 @@ public class GridView extends AbsListView {
     }
 
     @Override
+    public int getRowForPosition(int position) {
+        return position / mNumColumns;
+    }
+
+    @Override
+    public int getFirstPositionForRow(int row) {
+        return row * mNumColumns;
+    }
+
+    @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         // Sets up mListPadding
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);