diff --git a/core/java/android/animation/ValueAnimator.java b/core/java/android/animation/ValueAnimator.java
index 7f9a5d3..e721de9 100644
--- a/core/java/android/animation/ValueAnimator.java
+++ b/core/java/android/animation/ValueAnimator.java
@@ -17,6 +17,7 @@
 package android.animation;
 
 import android.annotation.CallSuper;
+import android.annotation.IntDef;
 import android.os.Looper;
 import android.os.Trace;
 import android.util.AndroidRuntimeException;
@@ -25,6 +26,8 @@
 import android.view.animation.AnimationUtils;
 import android.view.animation.LinearInterpolator;
 
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayList;
 import java.util.HashMap;
 
@@ -234,6 +237,11 @@
      * Public constants
      */
 
+    /** @hide */
+    @IntDef({RESTART, REVERSE})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface RepeatMode {}
+
     /**
      * When the animation reaches the end and <code>repeatCount</code> is INFINITE
      * or a positive value, the animation restarts from the beginning.
@@ -807,7 +815,7 @@
      *
      * @param value {@link #RESTART} or {@link #REVERSE}
      */
-    public void setRepeatMode(int value) {
+    public void setRepeatMode(@RepeatMode int value) {
         mRepeatMode = value;
     }
 
@@ -816,6 +824,7 @@
      *
      * @return either one of {@link #REVERSE} or {@link #RESTART}
      */
+    @RepeatMode
     public int getRepeatMode() {
         return mRepeatMode;
     }
diff --git a/core/java/android/transition/SidePropagation.java b/core/java/android/transition/SidePropagation.java
index b10f6a0..817541c 100644
--- a/core/java/android/transition/SidePropagation.java
+++ b/core/java/android/transition/SidePropagation.java
@@ -16,6 +16,7 @@
 package android.transition;
 
 import android.graphics.Rect;
+import android.transition.Slide.GravityFlag;
 import android.view.Gravity;
 import android.view.View;
 import android.view.ViewGroup;
@@ -45,7 +46,7 @@
      *             {@link Gravity#LEFT}, {@link Gravity#TOP}, {@link Gravity#RIGHT},
      *             {@link Gravity#BOTTOM}, {@link Gravity#START}, or {@link Gravity#END}.
      */
-    public void setSide(int side) {
+    public void setSide(@GravityFlag int side) {
         mSide = side;
     }
 
diff --git a/core/java/android/transition/Slide.java b/core/java/android/transition/Slide.java
index 9063b43..9af65e4 100644
--- a/core/java/android/transition/Slide.java
+++ b/core/java/android/transition/Slide.java
@@ -17,6 +17,7 @@
 
 import android.animation.Animator;
 import android.animation.TimeInterpolator;
+import android.annotation.IntDef;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.util.AttributeSet;
@@ -27,6 +28,9 @@
 import android.view.animation.DecelerateInterpolator;
 import com.android.internal.R;
 
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * This transition tracks changes to the visibility of target views in the
  * start and end scenes and moves views in or out from one of the edges of the
@@ -42,7 +46,12 @@
     private static final TimeInterpolator sAccelerate = new AccelerateInterpolator();
     private static final String PROPNAME_SCREEN_POSITION = "android:slide:screenPosition";
     private CalculateSlide mSlideCalculator = sCalculateBottom;
-    private int mSlideEdge = Gravity.BOTTOM;
+    private @GravityFlag int mSlideEdge = Gravity.BOTTOM;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({Gravity.LEFT, Gravity.TOP, Gravity.RIGHT, Gravity.BOTTOM, Gravity.START, Gravity.END})
+    public @interface GravityFlag {}
 
     private interface CalculateSlide {
 
@@ -176,7 +185,7 @@
      *                  {@link android.view.Gravity#START}, {@link android.view.Gravity#END}.
      * @attr ref android.R.styleable#Slide_slideEdge
      */
-    public void setSlideEdge(int slideEdge) {
+    public void setSlideEdge(@GravityFlag int slideEdge) {
         switch (slideEdge) {
             case Gravity.LEFT:
                 mSlideCalculator = sCalculateLeft;
@@ -214,6 +223,7 @@
      *         {@link android.view.Gravity#START}, {@link android.view.Gravity#END}.
      * @attr ref android.R.styleable#Slide_slideEdge
      */
+    @GravityFlag
     public int getSlideEdge() {
         return mSlideEdge;
     }
diff --git a/core/java/android/transition/Visibility.java b/core/java/android/transition/Visibility.java
index e711812..eb95a02 100644
--- a/core/java/android/transition/Visibility.java
+++ b/core/java/android/transition/Visibility.java
@@ -16,17 +16,21 @@
 
 package android.transition;
 
-import com.android.internal.R;
-
 import android.animation.Animator;
 import android.animation.Animator.AnimatorListener;
 import android.animation.Animator.AnimatorPauseListener;
+import android.annotation.IntDef;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.ViewGroup;
 
+import com.android.internal.R;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * This transition tracks changes to the visibility of target views in the
  * start and end scenes. Visibility is determined not just by the
@@ -46,6 +50,11 @@
     private static final String PROPNAME_PARENT = "android:visibility:parent";
     private static final String PROPNAME_SCREEN_LOCATION = "android:visibility:screenLocation";
 
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(flag=true, value={MODE_IN, MODE_OUT})
+    @interface VisibilityMode {}
+
     /**
      * Mode used in {@link #setMode(int)} to make the transition
      * operate on targets that are appearing. Maybe be combined with
@@ -99,7 +108,7 @@
      *             {@link #MODE_IN} and {@link #MODE_OUT}.
      * @attr ref android.R.styleable#VisibilityTransition_transitionVisibilityMode
      */
-    public void setMode(int mode) {
+    public void setMode(@VisibilityMode int mode) {
         if ((mode & ~(MODE_IN | MODE_OUT)) != 0) {
             throw new IllegalArgumentException("Only MODE_IN and MODE_OUT flags are allowed");
         }
@@ -113,6 +122,7 @@
      *         {@link #MODE_IN} and {@link #MODE_OUT}.
      * @attr ref android.R.styleable#VisibilityTransition_transitionVisibilityMode
      */
+    @VisibilityMode
     public int getMode() {
         return mMode;
     }