diff --git a/api/current.txt b/api/current.txt
index 78de86028377f..0b3c33bb53d27 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -6215,6 +6215,8 @@ package android.app.usage {
   public static class NetworkStats.Bucket {
     ctor public NetworkStats.Bucket();
     method public long getEndTimeStamp();
+    method public int getMetering();
+    method public int getRoaming();
     method public long getRxBytes();
     method public long getRxPackets();
     method public long getStartTimeStamp();
@@ -6222,6 +6224,12 @@ package android.app.usage {
     method public long getTxBytes();
     method public long getTxPackets();
     method public int getUid();
+    field public static final int METERING_ALL = -1; // 0xffffffff
+    field public static final int METERING_DEFAULT = 1; // 0x1
+    field public static final int METERING_METERED = 2; // 0x2
+    field public static final int ROAMING_ALL = -1; // 0xffffffff
+    field public static final int ROAMING_DEFAULT = 1; // 0x1
+    field public static final int ROAMING_ROAMING = 2; // 0x2
     field public static final int STATE_ALL = -1; // 0xffffffff
     field public static final int STATE_DEFAULT = 1; // 0x1
     field public static final int STATE_FOREGROUND = 2; // 0x2
diff --git a/api/system-current.txt b/api/system-current.txt
index 24d257d495140..2e6fc8207049a 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -6429,6 +6429,8 @@ package android.app.usage {
   public static class NetworkStats.Bucket {
     ctor public NetworkStats.Bucket();
     method public long getEndTimeStamp();
+    method public int getMetering();
+    method public int getRoaming();
     method public long getRxBytes();
     method public long getRxPackets();
     method public long getStartTimeStamp();
@@ -6436,6 +6438,12 @@ package android.app.usage {
     method public long getTxBytes();
     method public long getTxPackets();
     method public int getUid();
+    field public static final int METERING_ALL = -1; // 0xffffffff
+    field public static final int METERING_DEFAULT = 1; // 0x1
+    field public static final int METERING_METERED = 2; // 0x2
+    field public static final int ROAMING_ALL = -1; // 0xffffffff
+    field public static final int ROAMING_DEFAULT = 1; // 0x1
+    field public static final int ROAMING_ROAMING = 2; // 0x2
     field public static final int STATE_ALL = -1; // 0xffffffff
     field public static final int STATE_DEFAULT = 1; // 0x1
     field public static final int STATE_FOREGROUND = 2; // 0x2
diff --git a/api/test-current.txt b/api/test-current.txt
index 6b6bafb9454e1..c093531f13544 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -6215,6 +6215,8 @@ package android.app.usage {
   public static class NetworkStats.Bucket {
     ctor public NetworkStats.Bucket();
     method public long getEndTimeStamp();
+    method public int getMetering();
+    method public int getRoaming();
     method public long getRxBytes();
     method public long getRxPackets();
     method public long getStartTimeStamp();
@@ -6222,6 +6224,12 @@ package android.app.usage {
     method public long getTxBytes();
     method public long getTxPackets();
     method public int getUid();
+    field public static final int METERING_ALL = -1; // 0xffffffff
+    field public static final int METERING_DEFAULT = 1; // 0x1
+    field public static final int METERING_METERED = 2; // 0x2
+    field public static final int ROAMING_ALL = -1; // 0xffffffff
+    field public static final int ROAMING_DEFAULT = 1; // 0x1
+    field public static final int ROAMING_ROAMING = 2; // 0x2
     field public static final int STATE_ALL = -1; // 0xffffffff
     field public static final int STATE_DEFAULT = 1; // 0x1
     field public static final int STATE_FOREGROUND = 2; // 0x2
diff --git a/core/java/android/app/usage/NetworkStats.java b/core/java/android/app/usage/NetworkStats.java
index ef08eb9e89876..5f97c9e1d4fd2 100644
--- a/core/java/android/app/usage/NetworkStats.java
+++ b/core/java/android/app/usage/NetworkStats.java
@@ -121,12 +121,12 @@ public final class NetworkStats implements AutoCloseable {
      */
     public static class Bucket {
         /**
-         * Combined usage across all other states.
+         * Combined usage across all states.
          */
         public static final int STATE_ALL = -1;
 
         /**
-         * Usage not accounted in any other states.
+         * Usage not accounted for in any other state.
          */
         public static final int STATE_DEFAULT = 0x1;
 
@@ -150,8 +150,40 @@ public final class NetworkStats implements AutoCloseable {
          */
         public static final int UID_TETHERING = TrafficStats.UID_TETHERING;
 
+        /**
+         * Combined usage across all metering states.
+         */
+        public static final int METERING_ALL = -1;
+
+        /**
+         * Usage not accounted for in any other metering state.
+         */
+        public static final int METERING_DEFAULT = 0x1;
+
+        /**
+         * Metered usage.
+         */
+        public static final int METERING_METERED = 0x2;
+
+        /**
+         * Combined usage across all roaming states.
+         */
+        public static final int ROAMING_ALL = -1;
+
+        /**
+         * Usage not accounted for in any other roaming state.
+         */
+        public static final int ROAMING_DEFAULT = 0x1;
+
+        /**
+         * Roaming usage.
+         */
+        public static final int ROAMING_ROAMING = 0x2;
+
         private int mUid;
         private int mState;
+        private int mMetering;
+        private int mRoaming;
         private long mBeginTimeStamp;
         private long mEndTimeStamp;
         private long mRxBytes;
@@ -205,6 +237,30 @@ public final class NetworkStats implements AutoCloseable {
             return mState;
         }
 
+        /**
+         * Metering state. One of the following values:<p/>
+         * <ul>
+         * <li>{@link #METERING_ALL}</li>
+         * <li>{@link #METERING_DEFAULT}</li>
+         * <li>{@link #METERING_METERED}</li>
+         * </ul>
+         */
+        public int getMetering() {
+            return mMetering;
+        }
+
+        /**
+         * Roaming state. One of the following values:<p/>
+         * <ul>
+         * <li>{@link #ROAMING_ALL}</li>
+         * <li>{@link #ROAMING_DEFAULT}</li>
+         * <li>{@link #ROAMING_ROAMING}</li>
+         * </ul>
+         */
+        public int getRoaming() {
+            return mRoaming;
+        }
+
         /**
          * Start timestamp of the bucket's time interval. Defined in terms of "Unix time", see
          * {@link java.lang.System#currentTimeMillis}.
@@ -398,6 +454,9 @@ public final class NetworkStats implements AutoCloseable {
     private void fillBucketFromSummaryEntry(Bucket bucketOut) {
         bucketOut.mUid = Bucket.convertUid(mRecycledSummaryEntry.uid);
         bucketOut.mState = Bucket.convertState(mRecycledSummaryEntry.set);
+        // TODO: Implement metering/roaming tracking.
+        bucketOut.mMetering = Bucket.METERING_ALL;
+        bucketOut.mRoaming = Bucket.ROAMING_ALL;
         bucketOut.mBeginTimeStamp = mStartTimeStamp;
         bucketOut.mEndTimeStamp = mEndTimeStamp;
         bucketOut.mRxBytes = mRecycledSummaryEntry.rxBytes;
@@ -444,6 +503,8 @@ public final class NetworkStats implements AutoCloseable {
                         mRecycledHistoryEntry);
                 bucketOut.mUid = Bucket.convertUid(getUid());
                 bucketOut.mState = Bucket.STATE_ALL;
+                bucketOut.mMetering = Bucket.METERING_ALL;
+                bucketOut.mRoaming = Bucket.ROAMING_ALL;
                 bucketOut.mBeginTimeStamp = mRecycledHistoryEntry.bucketStart;
                 bucketOut.mEndTimeStamp = mRecycledHistoryEntry.bucketStart +
                         mRecycledHistoryEntry.bucketDuration;