Dispatch mouse events to the view under cursor.

Events from touchpads may have multiple fingers on them, and the down
event may be active with a finger which coordinate isn't in the view
where the mouse cursor is. Need to make sure it's dispatched to the view
under the mouse cursor.

Bug: 140312476
Test: Two-finger scroll on DualShock 4 always happen in the view under
the cursor, regardless of the order of finger put on the touch pad.
Test: atest FrameworksCoreTests:ViewGroupTest

Change-Id: I679a0a38c830bd418bb412bc6f0d78ba5c93224a

1 files changed, 4 insertions, 2 deletions

diff --git a/core/java/android/view/ViewGroup.java b/core/java/android/view/ViewGroup.java
index 9095dbe0165a..853a30226982 100644
--- a/core/java/android/view/ViewGroup.java
+++ b/core/java/android/view/ViewGroup.java
@@ -2634,8 +2634,10 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
 
                     final int childrenCount = mChildrenCount;
                     if (newTouchTarget == null && childrenCount != 0) {
-                        final float x = ev.getX(actionIndex);
-                        final float y = ev.getY(actionIndex);
+                        final float x =
+                                isMouseEvent ? ev.getXCursorPosition() : ev.getX(actionIndex);
+                        final float y =
+                                isMouseEvent ? ev.getYCursorPosition() : ev.getY(actionIndex);
                         // Find a child that can receive the event.
                         // Scan children from front to back.
                         final ArrayList<View> preorderedList = buildTouchDispatchChildList();