1 files changed, 25 insertions, 0 deletions
diff --git a/src/com/android/datetimepicker/Utils.java b/src/com/android/datetimepicker/Utils.java
index 9bc5952..ae3087b 100644
--- a/src/com/android/datetimepicker/Utils.java
+++ b/src/com/android/datetimepicker/Utils.java
@@ -16,8 +16,12 @@
 
 package com.android.datetimepicker;
 
+import android.animation.Keyframe;
+import android.animation.ObjectAnimator;
+import android.animation.PropertyValuesHolder;
 import android.os.Build;
 import android.text.format.Time;
+import android.view.View;
 
 import java.util.Calendar;
 
@@ -27,6 +31,7 @@ import java.util.Calendar;
 public class Utils {
 
     public static final int MONDAY_BEFORE_JULIAN_EPOCH = Time.EPOCH_JULIAN_DAY - 3;
+    public static final int PULSE_ANIMATOR_DURATION = 600;
 
     static final String SHARED_PREFS_NAME = "com.android.calendar_preferences";
 
@@ -92,4 +97,24 @@ public class Utils {
         int refDay = Time.EPOCH_JULIAN_DAY - diff;
         return (julianDay - refDay) / 7;
     }
+
+    /**
+     * Render an animator to pulsate a view in place.
+     * @param labelToAnimate the view to pulsate.
+     * @return The animator object. Use .start() to begin.
+     */
+    public static ObjectAnimator getPulseAnimator(View labelToAnimate) {
+        Keyframe k0 = Keyframe.ofFloat(0f, 1f);
+        Keyframe k1 = Keyframe.ofFloat(0.25f, 0.85f);
+        Keyframe k2 = Keyframe.ofFloat(0.625f, 1.1f);
+        Keyframe k3 = Keyframe.ofFloat(1f, 1f);
+
+        PropertyValuesHolder scaleX = PropertyValuesHolder.ofKeyframe("scaleX", k0, k1, k2, k3);
+        PropertyValuesHolder scaleY = PropertyValuesHolder.ofKeyframe("scaleY", k0, k1, k2, k3);
+        ObjectAnimator pulseAnimator =
+                ObjectAnimator.ofPropertyValuesHolder(labelToAnimate, scaleX, scaleY);
+        pulseAnimator.setDuration(PULSE_ANIMATOR_DURATION);
+
+        return pulseAnimator;
+    }
 }