diff --git a/core/java/android/widget/RadialTimePickerView.java b/core/java/android/widget/RadialTimePickerView.java
index 02ee2df..6f198e7 100644
--- a/core/java/android/widget/RadialTimePickerView.java
+++ b/core/java/android/widget/RadialTimePickerView.java
@@ -16,7 +16,11 @@
 
 package android.widget;
 
+import com.android.internal.R;
+import com.android.internal.widget.ExploreByTouchHelper;
+
 import android.animation.ObjectAnimator;
+import android.annotation.IntDef;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.content.res.Resources;
@@ -43,9 +47,8 @@
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction;
 
-import com.android.internal.R;
-import com.android.internal.widget.ExploreByTouchHelper;
-
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
 import java.util.Calendar;
 import java.util.Locale;
 
@@ -55,11 +58,16 @@
  * @hide
  */
 public class RadialTimePickerView extends View {
-
     private static final String TAG = "RadialTimePickerView";
 
     public static final int HOURS = 0;
     public static final int MINUTES = 1;
+
+    /** @hide */
+    @IntDef({HOURS, MINUTES})
+    @Retention(RetentionPolicy.SOURCE)
+    @interface PickerType {}
+
     private static final int HOURS_INNER = 2;
 
     private static final int SELECTOR_CIRCLE = 0;
@@ -185,8 +193,24 @@
 
     private boolean mInputEnabled = true;
 
-    public interface OnValueSelectedListener {
-        void onValueSelected(int pickerIndex, int newValue, boolean autoAdvance);
+    interface OnValueSelectedListener {
+        /**
+         * Called when the selected value at a given picker index has changed.
+         *
+         * @param pickerType the type of value that has changed, one of:
+         *                   <ul>
+         *                       <li>{@link #MINUTES}
+         *                       <li>{@link #HOURS}
+         *                   </ul>
+         * @param newValue the new value as minute in hour (0-59) or hour in
+         *                 day (0-23)
+         * @param autoAdvance when the picker type is {@link #HOURS},
+         *                    {@code true} to switch to the {@link #MINUTES}
+         *                    picker or {@code false} to stay on the current
+         *                    picker. No effect when picker type is
+         *                    {@link #MINUTES}.
+         */
+        void onValueSelected(@PickerType int pickerType, int newValue, boolean autoAdvance);
     }
 
     /**
@@ -977,7 +1001,7 @@
         // Ensure we're showing the correct picker.
         animatePicker(mShowHours, ANIM_DURATION_TOUCH);
 
-        final int type;
+        final @PickerType int type;
         final int newValue;
         final boolean valueChanged;
 
diff --git a/core/java/android/widget/TimePickerClockDelegate.java b/core/java/android/widget/TimePickerClockDelegate.java
index c21f1df..aa0b93d 100644
--- a/core/java/android/widget/TimePickerClockDelegate.java
+++ b/core/java/android/widget/TimePickerClockDelegate.java
@@ -61,9 +61,6 @@
     private static final int HOUR_INDEX = RadialTimePickerView.HOURS;
     private static final int MINUTE_INDEX = RadialTimePickerView.MINUTES;
 
-    // NOT a real index for the purpose of what's showing.
-    private static final int AMPM_INDEX = 2;
-
     private static final int[] ATTRS_TEXT_COLOR = new int[] {R.attr.textColor};
     private static final int[] ATTRS_DISABLED_ALPHA = new int[] {R.attr.disabledAlpha};
 
@@ -701,22 +698,21 @@
     /** Listener for RadialTimePickerView interaction. */
     private final OnValueSelectedListener mOnValueSelectedListener = new OnValueSelectedListener() {
         @Override
-        public void onValueSelected(int pickerIndex, int newValue, boolean autoAdvance) {
-            switch (pickerIndex) {
-                case HOUR_INDEX:
+        public void onValueSelected(int pickerType, int newValue, boolean autoAdvance) {
+            switch (pickerType) {
+                case RadialTimePickerView.HOURS:
                     final boolean isTransition = mAllowAutoAdvance && autoAdvance;
                     setHourInternal(newValue, true, !isTransition);
                     if (isTransition) {
                         setCurrentItemShowing(MINUTE_INDEX, true, false);
-                        mDelegator.announceForAccessibility(newValue + ". " + mSelectMinutes);
+
+                        final int localizedHour = getLocalizedHour(newValue);
+                        mDelegator.announceForAccessibility(localizedHour + ". " + mSelectMinutes);
                     }
                     break;
-                case MINUTE_INDEX:
+                case RadialTimePickerView.MINUTES:
                     setMinuteInternal(newValue, true);
                     break;
-                case AMPM_INDEX:
-                    updateAmPmLabelStates(newValue);
-                    break;
             }
 
             if (mOnTimeChangedListener != null) {