Resolve pointer icon over FastScroller to arrow.

Currently the icon defined by the host AbsListView is displayed
over the fast scroll area.

Bug: 35424111
Test: manual
Change-Id: Ia9897a44550922f16573b97337841c3f6ae263da

core/java/android/widget/AbsListView.java

@@ -54,6 +54,7 @@ import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.MotionEvent;
+import android.view.PointerIcon;
 import android.view.VelocityTracker;
 import android.view.View;
 import android.view.ViewConfiguration;
@@ -4401,6 +4402,17 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
         return super.onInterceptHoverEvent(event);
     }
 
+    @Override
+    public PointerIcon onResolvePointerIcon(MotionEvent event, int pointerIndex) {
+        if (mFastScroll != null) {
+            PointerIcon pointerIcon = mFastScroll.onResolvePointerIcon(event, pointerIndex);
+            if (pointerIcon != null) {
+                return pointerIcon;
+            }
+        }
+        return super.onResolvePointerIcon(event, pointerIndex);
+    }
+
     @Override
     public boolean onInterceptTouchEvent(MotionEvent ev) {
         final int actionMasked = ev.getActionMasked();

core/java/android/widget/FastScroller.java

@@ -38,6 +38,7 @@ import android.util.Property;
 import android.util.TypedValue;
 import android.view.Gravity;
 import android.view.MotionEvent;
+import android.view.PointerIcon;
 import android.view.View;
 import android.view.View.MeasureSpec;
 import android.view.ViewConfiguration;
@@ -1441,6 +1442,13 @@ class FastScroller {
         return false;
     }
 
+    public PointerIcon onResolvePointerIcon(MotionEvent event, int pointerIndex) {
+        if (mState == STATE_DRAGGING || isPointInside(event.getX(), event.getY())) {
+            return PointerIcon.getSystemIcon(mList.getContext(), PointerIcon.TYPE_ARROW);
+        }
+        return null;
+    }
+
     public boolean onTouchEvent(MotionEvent me) {
         if (!isEnabled()) {
             return false;