diff --git a/api/current.txt b/api/current.txt
index ef18bf9f05f6a..c954a74e7aefb 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -2876,6 +2876,7 @@ package android.animation {
     method public android.animation.TimeInterpolator getInterpolator();
     method public java.util.ArrayList<android.animation.Animator.AnimatorListener> getListeners();
     method public abstract long getStartDelay();
+    method public long getTotalDuration();
     method public boolean isPaused();
     method public abstract boolean isRunning();
     method public boolean isStarted();
@@ -2891,6 +2892,7 @@ package android.animation {
     method public void setupEndValues();
     method public void setupStartValues();
     method public void start();
+    field public static final long DURATION_INFINITE = -1L; // 0xffffffffffffffffL
   }
 
   public static abstract interface Animator.AnimatorListener {
diff --git a/api/system-current.txt b/api/system-current.txt
index 0b216bdddb301..2a22f7b6d8a25 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -2975,6 +2975,7 @@ package android.animation {
     method public android.animation.TimeInterpolator getInterpolator();
     method public java.util.ArrayList<android.animation.Animator.AnimatorListener> getListeners();
     method public abstract long getStartDelay();
+    method public long getTotalDuration();
     method public boolean isPaused();
     method public abstract boolean isRunning();
     method public boolean isStarted();
@@ -2990,6 +2991,7 @@ package android.animation {
     method public void setupEndValues();
     method public void setupStartValues();
     method public void start();
+    field public static final long DURATION_INFINITE = -1L; // 0xffffffffffffffffL
   }
 
   public static abstract interface Animator.AnimatorListener {
diff --git a/core/java/android/animation/Animator.java b/core/java/android/animation/Animator.java
index d331c2a066c49..844063c04e83c 100644
--- a/core/java/android/animation/Animator.java
+++ b/core/java/android/animation/Animator.java
@@ -28,7 +28,6 @@ public abstract class Animator implements Cloneable {
 
     /**
      * The value used to indicate infinite duration (e.g. when Animators repeat infinitely).
-     * @hide
      */
     public static final long DURATION_INFINITE = -1;
     /**
@@ -191,11 +190,18 @@ public abstract class Animator implements Cloneable {
     /**
      * Gets the total duration of the animation, accounting for animation sequences, start delay,
      * and repeating. Return {@link #DURATION_INFINITE} if the duration is infinite.
-     * @hide
-     * TODO: Unhide
+     *
+     * @return  Total time an animation takes to finish, starting from the time {@link #start()}
+     *          is called. {@link #DURATION_INFINITE} will be returned if the animation or any
+     *          child animation repeats infinite times.
      */
     public long getTotalDuration() {
-        return getStartDelay() + getDuration();
+        long duration = getDuration();
+        if (duration == DURATION_INFINITE) {
+            return DURATION_INFINITE;
+        } else {
+            return getStartDelay() + duration;
+        }
     }
 
     /**
diff --git a/core/java/android/animation/AnimatorSet.java b/core/java/android/animation/AnimatorSet.java
index d444638c715a5..1ab55dd7c1d93 100644
--- a/core/java/android/animation/AnimatorSet.java
+++ b/core/java/android/animation/AnimatorSet.java
@@ -1030,9 +1030,6 @@ public final class AnimatorSet extends Animator {
         }
     }
 
-    /**
-     * @hide
-     */
     @Override
     public long getTotalDuration() {
         updateAnimatorsDuration();
diff --git a/core/java/android/animation/ValueAnimator.java b/core/java/android/animation/ValueAnimator.java
index 4b3df30c778db..6f65889c3b534 100644
--- a/core/java/android/animation/ValueAnimator.java
+++ b/core/java/android/animation/ValueAnimator.java
@@ -536,9 +536,6 @@ public class ValueAnimator extends Animator implements AnimationHandler.Animatio
         return mDuration;
     }
 
-    /**
-     * @hide
-     */
     @Override
     public long getTotalDuration() {
         if (mRepeatCount == INFINITE) {
diff --git a/core/java/android/view/RenderNodeAnimator.java b/core/java/android/view/RenderNodeAnimator.java
index 2a3756d6b7b3e..7747580892f1b 100644
--- a/core/java/android/view/RenderNodeAnimator.java
+++ b/core/java/android/view/RenderNodeAnimator.java
@@ -336,9 +336,6 @@ public class RenderNodeAnimator extends Animator {
         return mUnscaledDuration;
     }
 
-    /**
-     * @hide
-     */
     @Override
     public long getTotalDuration() {
         return mUnscaledDuration + mUnscaledStartDelay;