Add a minimum timeout for double-tap in GestureDetector

Prevent noisy falsing. Minimum timeout is currently 40ms and can be
tuned for later. Consider un-hiding the ViewConfiguration query method
later.

Bug 10476944

Change-Id: Ib470735ec929b0b358fca4597e92dc81084e675f

1 files changed, 18 insertions, 0 deletions

diff --git a/core/java/android/view/ViewConfiguration.java b/core/java/android/view/ViewConfiguration.java
index f8cb9c068aa7..c3f064fdfd4a 100644
--- a/core/java/android/view/ViewConfiguration.java
+++ b/core/java/android/view/ViewConfiguration.java
@@ -97,6 +97,13 @@ public class ViewConfiguration {
     private static final int DOUBLE_TAP_TIMEOUT = 300;
 
     /**
+     * Defines the minimum duration in milliseconds between the first tap's up event and
+     * the second tap's down event for an interaction to be considered a
+     * double-tap.
+     */
+    private static final int DOUBLE_TAP_MIN_TIME = 40;
+
+    /**
      * Defines the maximum duration in milliseconds between a touch pad
      * touch and release for a given touch to be considered a tap (click) as
      * opposed to a hover movement gesture.
@@ -436,6 +443,17 @@ public class ViewConfiguration {
     }
 
     /**
+     * @return the minimum duration in milliseconds between the first tap's
+     * up event and the second tap's down event for an interaction to be considered a
+     * double-tap.
+     *
+     * @hide
+     */
+    public static int getDoubleTapMinTime() {
+        return DOUBLE_TAP_MIN_TIME;
+    }
+
+    /**
      * @return the maximum duration in milliseconds between a touch pad
      * touch and release for a given touch to be considered a tap (click) as
      * opposed to a hover movement gesture.