diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index 104134a..fb916d3 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -22,6 +22,7 @@
 import android.annotation.SdkConstant.SdkConstantType;
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
+import android.annotation.UnsupportedAppUsage;
 import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
@@ -311,6 +312,7 @@
      * @hide
      */
     @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    @UnsupportedAppUsage
     public static final String INET_CONDITION_ACTION =
             "android.net.conn.INET_CONDITION_ACTION";
 
@@ -325,6 +327,7 @@
      * @hide
      */
     @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    @UnsupportedAppUsage
     public static final String ACTION_TETHER_STATE_CHANGED =
             "android.net.conn.TETHER_STATE_CHANGED";
 
@@ -333,6 +336,7 @@
      * gives a String[] listing all the interfaces configured for
      * tethering and currently available for tethering.
      */
+    @UnsupportedAppUsage
     public static final String EXTRA_AVAILABLE_TETHER = "availableArray";
 
     /**
@@ -347,6 +351,7 @@
      * gives a String[] listing all the interfaces currently tethered
      * (ie, has DHCPv4 support and packets potentially forwarded/NATed)
      */
+    @UnsupportedAppUsage
     public static final String EXTRA_ACTIVE_TETHER = "tetherArray";
 
     /**
@@ -355,6 +360,7 @@
      * failed.  Use {@link #getLastTetherError} to find the error code
      * for any interfaces listed here.
      */
+    @UnsupportedAppUsage
     public static final String EXTRA_ERRORED_TETHER = "erroredArray";
 
     /**
@@ -459,6 +465,7 @@
      * The absence of a connection type.
      * @hide
      */
+    @UnsupportedAppUsage
     public static final int TYPE_NONE        = -1;
 
     /**
@@ -575,6 +582,7 @@
      * {@hide}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static final int TYPE_MOBILE_FOTA = 10;
 
     /**
@@ -583,6 +591,7 @@
      * {@hide}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static final int TYPE_MOBILE_IMS  = 11;
 
     /**
@@ -591,6 +600,7 @@
      * {@hide}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static final int TYPE_MOBILE_CBS  = 12;
 
     /**
@@ -600,6 +610,7 @@
      * {@hide}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static final int TYPE_WIFI_P2P    = 13;
 
     /**
@@ -608,6 +619,7 @@
      * {@hide}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static final int TYPE_MOBILE_IA = 14;
 
     /**
@@ -617,6 +629,7 @@
      * {@hide}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static final int TYPE_MOBILE_EMERGENCY = 15;
 
     /**
@@ -625,6 +638,7 @@
      * {@hide}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static final int TYPE_PROXY = 16;
 
     /**
@@ -707,6 +721,7 @@
      */
     public static final String PRIVATE_DNS_DEFAULT_MODE_FALLBACK = PRIVATE_DNS_MODE_OPPORTUNISTIC;
 
+    @UnsupportedAppUsage
     private final IConnectivityManager mService;
     /**
      * A kludge to facilitate static access where a Context pointer isn't available, like in the
@@ -743,6 +758,7 @@
      * {@hide}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static String getNetworkTypeName(int type) {
         switch (type) {
           case TYPE_NONE:
@@ -797,6 +813,7 @@
      * {@hide}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static boolean isNetworkTypeMobile(int networkType) {
         switch (networkType) {
             case TYPE_MOBILE:
@@ -1010,6 +1027,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.CONNECTIVITY_INTERNAL)
+    @UnsupportedAppUsage
     public NetworkInfo getActiveNetworkInfoForUid(int uid) {
         return getActiveNetworkInfoForUid(uid, false);
     }
@@ -1107,6 +1125,7 @@
      */
     @Deprecated
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public Network getNetworkForType(int networkType) {
         try {
             return mService.getNetworkForType(networkType);
@@ -1135,6 +1154,7 @@
      * the Networks that applications run by the given user will use by default.
      * @hide
      */
+    @UnsupportedAppUsage
     public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) {
         try {
             return mService.getDefaultNetworkCapabilitiesForUser(userId);
@@ -1153,6 +1173,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public LinkProperties getActiveLinkProperties() {
         try {
             return mService.getActiveLinkProperties();
@@ -1177,6 +1198,7 @@
      */
     @Deprecated
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public LinkProperties getLinkProperties(int networkType) {
         try {
             return mService.getLinkPropertiesForType(networkType);
@@ -1332,6 +1354,7 @@
         return 1;
     }
 
+    @UnsupportedAppUsage
     private NetworkCapabilities networkCapabilitiesForFeature(int networkType, String feature) {
         if (networkType == TYPE_MOBILE) {
             switch (feature) {
@@ -1495,6 +1518,7 @@
         };
     }
 
+    @UnsupportedAppUsage
     private static final HashMap<NetworkCapabilities, LegacyRequest> sLegacyRequests =
             new HashMap<>();
 
@@ -1523,6 +1547,7 @@
         Log.d(TAG, "expireRequest with " + ourSeqNum + ", " + sequenceNum);
     }
 
+    @UnsupportedAppUsage
     private NetworkRequest requestNetworkForFeatureLocked(NetworkCapabilities netCap) {
         int delay = -1;
         int type = legacyTypeForNetworkCapabilities(netCap);
@@ -1552,6 +1577,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     private boolean removeRequestForFeature(NetworkCapabilities netCap) {
         final LegacyRequest l;
         synchronized (sLegacyRequests) {
@@ -1619,10 +1645,13 @@
     /** @hide */
     public static class PacketKeepaliveCallback {
         /** The requested keepalive was successfully started. */
+        @UnsupportedAppUsage
         public void onStarted() {}
         /** The keepalive was successfully stopped. */
+        @UnsupportedAppUsage
         public void onStopped() {}
         /** An error occurred. */
+        @UnsupportedAppUsage
         public void onError(int error) {}
     }
 
@@ -1689,6 +1718,7 @@
             mLooper.quit();
         }
 
+        @UnsupportedAppUsage
         public void stop() {
             try {
                 mService.stopKeepalive(mNetwork, mSlot);
@@ -1744,6 +1774,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public PacketKeepalive startNattKeepalive(
             Network network, int intervalSeconds, PacketKeepaliveCallback callback,
             InetAddress srcAddr, int srcPort, InetAddress dstAddr) {
@@ -1805,6 +1836,7 @@
      *             {@link #bindProcessToNetwork} API.
      */
     @Deprecated
+    @UnsupportedAppUsage
     public boolean requestRouteToHostAddress(int networkType, InetAddress hostAddress) {
         checkLegacyRoutingApiAccess();
         try {
@@ -1848,12 +1880,14 @@
      * @hide
      */
     @Deprecated
+    @UnsupportedAppUsage
     public void setBackgroundDataSetting(boolean allowBackgroundData) {
         // ignored
     }
 
     /** {@hide} */
     @Deprecated
+    @UnsupportedAppUsage
     public NetworkQuotaInfo getActiveNetworkQuotaInfo() {
         try {
             return mService.getActiveNetworkQuotaInfo();
@@ -1867,6 +1901,7 @@
      * @deprecated Talk to TelephonyManager directly
      */
     @Deprecated
+    @UnsupportedAppUsage
     public boolean getMobileDataEnabled() {
         IBinder b = ServiceManager.getService(Context.TELEPHONY_SERVICE);
         if (b != null) {
@@ -1986,6 +2021,7 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public static ConnectivityManager from(Context context) {
         return (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
     }
@@ -2036,6 +2072,7 @@
      * @hide
      */
     @Deprecated
+    @UnsupportedAppUsage
     private static ConnectivityManager getInstance() {
         if (getInstanceOrNull() == null) {
             throw new IllegalStateException("No ConnectivityManager yet constructed");
@@ -2052,6 +2089,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public String[] getTetherableIfaces() {
         try {
             return mService.getTetherableIfaces();
@@ -2068,6 +2106,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public String[] getTetheredIfaces() {
         try {
             return mService.getTetheredIfaces();
@@ -2090,6 +2129,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public String[] getTetheringErroredIfaces() {
         try {
             return mService.getTetheringErroredIfaces();
@@ -2136,6 +2176,7 @@
      *
      * {@hide}
      */
+    @UnsupportedAppUsage
     public int tether(String iface) {
         try {
             String pkgName = mContext.getOpPackageName();
@@ -2164,6 +2205,7 @@
      *
      * {@hide}
      */
+    @UnsupportedAppUsage
     public int untether(String iface) {
         try {
             String pkgName = mContext.getOpPackageName();
@@ -2317,6 +2359,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public String[] getTetherableUsbRegexs() {
         try {
             return mService.getTetherableUsbRegexs();
@@ -2336,6 +2379,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public String[] getTetherableWifiRegexs() {
         try {
             return mService.getTetherableWifiRegexs();
@@ -2355,6 +2399,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public String[] getTetherableBluetoothRegexs() {
         try {
             return mService.getTetherableBluetoothRegexs();
@@ -2380,6 +2425,7 @@
      *
      * {@hide}
      */
+    @UnsupportedAppUsage
     public int setUsbTethering(boolean enable) {
         try {
             String pkgName = mContext.getOpPackageName();
@@ -2426,6 +2472,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public int getLastTetherError(String iface) {
         try {
             return mService.getLastTetherError(iface);
@@ -2579,6 +2626,7 @@
      */
     @Deprecated
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @UnsupportedAppUsage
     public boolean isNetworkSupported(int networkType) {
         try {
             return mService.isNetworkSupported(networkType);
@@ -2680,6 +2728,7 @@
      * @hide
      */
     @RequiresPermission(android.Manifest.permission.CONNECTIVITY_INTERNAL)
+    @UnsupportedAppUsage
     public void setAirplaneMode(boolean enable) {
         try {
             mService.setAirplaneMode(enable);
@@ -2689,6 +2738,7 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public void registerNetworkFactory(Messenger messenger, String name) {
         try {
             mService.registerNetworkFactory(messenger, name);
@@ -2698,6 +2748,7 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public void unregisterNetworkFactory(Messenger messenger) {
         try {
             mService.unregisterNetworkFactory(messenger);
@@ -3786,6 +3837,7 @@
      * @deprecated This is strictly for legacy usage to support {@link #startUsingNetworkFeature}.
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static boolean setProcessDefaultNetworkForHostResolution(Network network) {
         return NetworkUtils.bindProcessToNetworkForHostResolution(
                 network == null ? NETID_UNSET : network.netId);
diff --git a/core/java/android/net/DhcpResults.java b/core/java/android/net/DhcpResults.java
index 8c5f603..b5d8226 100644
--- a/core/java/android/net/DhcpResults.java
+++ b/core/java/android/net/DhcpResults.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.net.NetworkUtils;
 import android.os.Parcel;
 import android.text.TextUtils;
@@ -33,25 +34,32 @@
 public class DhcpResults extends StaticIpConfiguration {
     private static final String TAG = "DhcpResults";
 
+    @UnsupportedAppUsage
     public Inet4Address serverAddress;
 
     /** Vendor specific information (from RFC 2132). */
+    @UnsupportedAppUsage
     public String vendorInfo;
 
+    @UnsupportedAppUsage
     public int leaseDuration;
 
     /** Link MTU option. 0 means unset. */
+    @UnsupportedAppUsage
     public int mtu;
 
+    @UnsupportedAppUsage
     public DhcpResults() {
         super();
     }
 
+    @UnsupportedAppUsage
     public DhcpResults(StaticIpConfiguration source) {
         super(source);
     }
 
     /** copy constructor */
+    @UnsupportedAppUsage
     public DhcpResults(DhcpResults source) {
         super(source);
 
diff --git a/core/java/android/net/EthernetManager.java b/core/java/android/net/EthernetManager.java
index ecccda5..7256502 100644
--- a/core/java/android/net/EthernetManager.java
+++ b/core/java/android/net/EthernetManager.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.SystemService;
+import android.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Handler;
 import android.os.Message;
@@ -66,6 +67,7 @@
          * @param iface Ethernet interface name
          * @param isAvailable {@code true} if Ethernet port exists.
          */
+        @UnsupportedAppUsage
         void onAvailabilityChanged(String iface, boolean isAvailable);
     }
 
@@ -84,6 +86,7 @@
      * Get Ethernet configuration.
      * @return the Ethernet Configuration, contained in {@link IpConfiguration}.
      */
+    @UnsupportedAppUsage
     public IpConfiguration getConfiguration(String iface) {
         try {
             return mService.getConfiguration(iface);
@@ -95,6 +98,7 @@
     /**
      * Set Ethernet configuration.
      */
+    @UnsupportedAppUsage
     public void setConfiguration(String iface, IpConfiguration config) {
         try {
             mService.setConfiguration(iface, config);
@@ -106,6 +110,7 @@
     /**
      * Indicates whether the system currently has one or more Ethernet interfaces.
      */
+    @UnsupportedAppUsage
     public boolean isAvailable() {
         return getAvailableInterfaces().length > 0;
     }
@@ -115,6 +120,7 @@
      *
      * @param iface Ethernet interface name
      */
+    @UnsupportedAppUsage
     public boolean isAvailable(String iface) {
         try {
             return mService.isAvailable(iface);
@@ -128,6 +134,7 @@
      * @param listener A {@link Listener} to add.
      * @throws IllegalArgumentException If the listener is null.
      */
+    @UnsupportedAppUsage
     public void addListener(Listener listener) {
         if (listener == null) {
             throw new IllegalArgumentException("listener must not be null");
@@ -145,6 +152,7 @@
     /**
      * Returns an array of available Ethernet interface names.
      */
+    @UnsupportedAppUsage
     public String[] getAvailableInterfaces() {
         try {
             return mService.getAvailableInterfaces();
@@ -158,6 +166,7 @@
      * @param listener A {@link Listener} to remove.
      * @throws IllegalArgumentException If the listener is null.
      */
+    @UnsupportedAppUsage
     public void removeListener(Listener listener) {
         if (listener == null) {
             throw new IllegalArgumentException("listener must not be null");
diff --git a/core/java/android/net/InterfaceConfiguration.java b/core/java/android/net/InterfaceConfiguration.java
index 34cde08..b274155 100644
--- a/core/java/android/net/InterfaceConfiguration.java
+++ b/core/java/android/net/InterfaceConfiguration.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -45,6 +46,7 @@
         return builder.toString();
     }
 
+    @UnsupportedAppUsage
     public Iterable<String> getFlags() {
         return mFlags;
     }
@@ -54,11 +56,13 @@
         return mFlags.contains(flag);
     }
 
+    @UnsupportedAppUsage
     public void clearFlag(String flag) {
         validateFlag(flag);
         mFlags.remove(flag);
     }
 
+    @UnsupportedAppUsage
     public void setFlag(String flag) {
         validateFlag(flag);
         mFlags.add(flag);
@@ -67,6 +71,7 @@
     /**
      * Set flags to mark interface as up.
      */
+    @UnsupportedAppUsage
     public void setInterfaceUp() {
         mFlags.remove(FLAG_DOWN);
         mFlags.add(FLAG_UP);
@@ -75,6 +80,7 @@
     /**
      * Set flags to mark interface as down.
      */
+    @UnsupportedAppUsage
     public void setInterfaceDown() {
         mFlags.remove(FLAG_UP);
         mFlags.add(FLAG_DOWN);
@@ -92,6 +98,7 @@
         return mAddr;
     }
 
+    @UnsupportedAppUsage
     public void setLinkAddress(LinkAddress addr) {
         mAddr = addr;
     }
diff --git a/core/java/android/net/IpConfiguration.java b/core/java/android/net/IpConfiguration.java
index fe69f296..7543920 100644
--- a/core/java/android/net/IpConfiguration.java
+++ b/core/java/android/net/IpConfiguration.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.net.StaticIpConfiguration;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -32,6 +33,7 @@
     public enum IpAssignment {
         /* Use statically configured IP settings. Configuration can be accessed
          * with staticIpConfiguration */
+        @UnsupportedAppUsage
         STATIC,
         /* Use dynamically configured IP settigns */
         DHCP,
@@ -47,6 +49,7 @@
     public enum ProxySettings {
         /* No proxy is to be used. Any existing proxy settings
          * should be cleared. */
+        @UnsupportedAppUsage
         NONE,
         /* Use statically configured proxy. Configuration can be accessed
          * with httpProxy. */
@@ -61,6 +64,7 @@
 
     public ProxySettings proxySettings;
 
+    @UnsupportedAppUsage
     public ProxyInfo httpProxy;
 
     private void init(IpAssignment ipAssignment,
@@ -79,6 +83,7 @@
         init(IpAssignment.UNASSIGNED, ProxySettings.UNASSIGNED, null, null);
     }
 
+    @UnsupportedAppUsage
     public IpConfiguration(IpAssignment ipAssignment,
                            ProxySettings proxySettings,
                            StaticIpConfiguration staticIpConfiguration,
diff --git a/core/java/android/net/LinkAddress.java b/core/java/android/net/LinkAddress.java
index bcfe938..1bc0d32 100644
--- a/core/java/android/net/LinkAddress.java
+++ b/core/java/android/net/LinkAddress.java
@@ -25,6 +25,7 @@
 import static android.system.OsConstants.RT_SCOPE_SITE;
 import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.Pair;
@@ -54,11 +55,13 @@
     /**
      * IPv4 or IPv6 address.
      */
+    @UnsupportedAppUsage
     private InetAddress address;
 
     /**
      * Prefix length.
      */
+    @UnsupportedAppUsage
     private int prefixLength;
 
     /**
@@ -112,6 +115,7 @@
      * @return true if the address is IPv6.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isIPv6() {
         return address instanceof Inet6Address;
     }
@@ -163,6 +167,7 @@
      * @param prefixLength The prefix length.
      * @hide
      */
+    @UnsupportedAppUsage
     public LinkAddress(InetAddress address, int prefixLength) {
         this(address, prefixLength, 0, 0);
         this.scope = scopeForUnicastAddress(address);
@@ -185,6 +190,7 @@
      * @param string The string to parse.
      * @hide
      */
+    @UnsupportedAppUsage
     public LinkAddress(String address) {
         this(address, 0, 0);
         this.scope = scopeForUnicastAddress(this.address);
@@ -255,6 +261,7 @@
      * otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isSameAddressAs(LinkAddress other) {
         return address.equals(other.address) && prefixLength == other.prefixLength;
     }
@@ -278,6 +285,7 @@
      * TODO: Delete all callers and remove in favour of getPrefixLength().
      * @hide
      */
+    @UnsupportedAppUsage
     public int getNetworkPrefixLength() {
         return getPrefixLength();
     }
diff --git a/core/java/android/net/LinkProperties.java b/core/java/android/net/LinkProperties.java
index bd2db92..1b9a66c 100644
--- a/core/java/android/net/LinkProperties.java
+++ b/core/java/android/net/LinkProperties.java
@@ -18,6 +18,7 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
@@ -48,6 +49,7 @@
  */
 public final class LinkProperties implements Parcelable {
     // The interface described by the network link.
+    @UnsupportedAppUsage
     private String mIfaceName;
     private ArrayList<LinkAddress> mLinkAddresses = new ArrayList<>();
     private ArrayList<InetAddress> mDnses = new ArrayList<>();
@@ -103,9 +105,13 @@
      * @hide
      */
     public enum ProvisioningChange {
+        @UnsupportedAppUsage
         STILL_NOT_PROVISIONED,
+        @UnsupportedAppUsage
         LOST_PROVISIONING,
+        @UnsupportedAppUsage
         GAINED_PROVISIONING,
+        @UnsupportedAppUsage
         STILL_PROVISIONED,
     }
 
@@ -114,6 +120,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public static ProvisioningChange compareProvisioning(
             LinkProperties before, LinkProperties after) {
         if (before.isProvisioned() && after.isProvisioned()) {
@@ -154,12 +161,14 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public LinkProperties() {
     }
 
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public LinkProperties(LinkProperties source) {
         if (source != null) {
             mIfaceName = source.mIfaceName;
@@ -186,6 +195,7 @@
      * @param iface The name of the network interface used for this link.
      * @hide
      */
+    @UnsupportedAppUsage
     public void setInterfaceName(String iface) {
         mIfaceName = iface;
         ArrayList<RouteInfo> newRoutes = new ArrayList<>(mRoutes.size());
@@ -207,6 +217,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public List<String> getAllInterfaceNames() {
         List<String> interfaceNames = new ArrayList<>(mStackedLinks.size() + 1);
         if (mIfaceName != null) interfaceNames.add(mIfaceName);
@@ -226,6 +237,7 @@
      * @return An unmodifiable {@link List} of {@link InetAddress} for this link.
      * @hide
      */
+    @UnsupportedAppUsage
     public List<InetAddress> getAddresses() {
         List<InetAddress> addresses = new ArrayList<>();
         for (LinkAddress linkAddress : mLinkAddresses) {
@@ -238,6 +250,7 @@
      * Returns all the addresses on this link and all the links stacked above it.
      * @hide
      */
+    @UnsupportedAppUsage
     public List<InetAddress> getAllAddresses() {
         List<InetAddress> addresses = new ArrayList<>();
         for (LinkAddress linkAddress : mLinkAddresses) {
@@ -265,6 +278,7 @@
      * @return true if {@code address} was added or updated, false otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean addLinkAddress(LinkAddress address) {
         if (address == null) {
             return false;
@@ -315,6 +329,7 @@
      * Returns all the addresses on this link and all the links stacked above it.
      * @hide
      */
+    @UnsupportedAppUsage
     public List<LinkAddress> getAllLinkAddresses() {
         List<LinkAddress> addresses = new ArrayList<>(mLinkAddresses);
         for (LinkProperties stacked: mStackedLinks.values()) {
@@ -331,6 +346,7 @@
      *                  object.
      * @hide
      */
+    @UnsupportedAppUsage
     public void setLinkAddresses(Collection<LinkAddress> addresses) {
         mLinkAddresses.clear();
         for (LinkAddress address: addresses) {
@@ -345,6 +361,7 @@
      * @return true if the DNS server was added, false if it was already present.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean addDnsServer(InetAddress dnsServer) {
         if (dnsServer != null && !mDnses.contains(dnsServer)) {
             mDnses.add(dnsServer);
@@ -360,6 +377,7 @@
      * @return true if the DNS server was removed, false if it did not exist.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean removeDnsServer(InetAddress dnsServer) {
         if (dnsServer != null) {
             return mDnses.remove(dnsServer);
@@ -374,6 +392,7 @@
      * @param dnsServers The {@link Collection} of DNS servers to set in this object.
      * @hide
      */
+    @UnsupportedAppUsage
     public void setDnsServers(Collection<InetAddress> dnsServers) {
         mDnses.clear();
         for (InetAddress dnsServer: dnsServers) {
@@ -510,6 +529,7 @@
      *                domains to search when resolving host names on this link.
      * @hide
      */
+    @UnsupportedAppUsage
     public void setDomains(String domains) {
         mDomains = domains;
     }
@@ -532,6 +552,7 @@
      * @param mtu The MTU to use for this link.
      * @hide
      */
+    @UnsupportedAppUsage
     public void setMtu(int mtu) {
         mMtu = mtu;
     }
@@ -543,6 +564,7 @@
      * @return The mtu value set for this link.
      * @hide
      */
+    @UnsupportedAppUsage
     public int getMtu() {
         return mMtu;
     }
@@ -555,6 +577,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public void setTcpBufferSizes(String tcpBufferSizes) {
         mTcpBufferSizes = tcpBufferSizes;
     }
@@ -566,6 +589,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public String getTcpBufferSizes() {
         return mTcpBufferSizes;
     }
@@ -589,6 +613,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean addRoute(RouteInfo route) {
         if (route != null) {
             String routeIface = route.getInterface();
@@ -615,6 +640,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean removeRoute(RouteInfo route) {
         return route != null &&
                 Objects.equals(mIfaceName, route.getInterface()) &&
@@ -645,6 +671,7 @@
      * Returns all the routes on this link and all the links stacked above it.
      * @hide
      */
+    @UnsupportedAppUsage
     public List<RouteInfo> getAllRoutes() {
         List<RouteInfo> routes = new ArrayList<>(mRoutes);
         for (LinkProperties stacked: mStackedLinks.values()) {
@@ -661,6 +688,7 @@
      * @param proxy A {@link ProxyInfo} defining the HTTP Proxy to use on this link.
      * @hide
      */
+    @UnsupportedAppUsage
     public void setHttpProxy(ProxyInfo proxy) {
         mHttpProxy = proxy;
     }
@@ -685,6 +713,7 @@
      * @return true if the link was stacked, false otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean addStackedLink(LinkProperties link) {
         if (link != null && link.getInterfaceName() != null) {
             mStackedLinks.put(link.getInterfaceName(), link);
@@ -715,6 +744,7 @@
      * Returns all the links stacked on top of this link.
      * @hide
      */
+    @UnsupportedAppUsage
     public @NonNull List<LinkProperties> getStackedLinks() {
         if (mStackedLinks.isEmpty()) {
             return Collections.emptyList();
@@ -730,6 +760,7 @@
      * Clears this object to its initial state.
      * @hide
      */
+    @UnsupportedAppUsage
     public void clear() {
         mIfaceName = null;
         mLinkAddresses.clear();
@@ -831,6 +862,7 @@
      * @return {@code true} if there is an IPv4 address, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean hasIPv4Address() {
         for (LinkAddress address : mLinkAddresses) {
             if (address.getAddress() instanceof Inet4Address) {
@@ -858,6 +890,7 @@
      * @return {@code true} if there is a global preferred IPv6 address, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean hasGlobalIPv6Address() {
         for (LinkAddress address : mLinkAddresses) {
           if (address.getAddress() instanceof Inet6Address && address.isGlobalPreferred()) {
@@ -873,6 +906,7 @@
      * @return {@code true} if there is an IPv4 default route, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean hasIPv4DefaultRoute() {
         for (RouteInfo r : mRoutes) {
             if (r.isIPv4Default()) {
@@ -888,6 +922,7 @@
      * @return {@code true} if there is an IPv6 default route, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean hasIPv6DefaultRoute() {
         for (RouteInfo r : mRoutes) {
             if (r.isIPv6Default()) {
@@ -903,6 +938,7 @@
      * @return {@code true} if there is an IPv4 DNS server, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean hasIPv4DnsServer() {
         for (InetAddress ia : mDnses) {
             if (ia instanceof Inet4Address) {
@@ -918,6 +954,7 @@
      * @return {@code true} if there is an IPv6 DNS server, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean hasIPv6DnsServer() {
         for (InetAddress ia : mDnses) {
             if (ia instanceof Inet6Address) {
@@ -947,6 +984,7 @@
      * @return {@code true} if the link is provisioned, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isIPv6Provisioned() {
         return (hasGlobalIPv6Address() &&
                 hasIPv6DefaultRoute() &&
@@ -960,6 +998,7 @@
      * @return {@code true} if the link is provisioned, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isProvisioned() {
         return (isIPv4Provisioned() || isIPv6Provisioned());
     }
@@ -971,6 +1010,7 @@
      *         {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isReachable(InetAddress ip) {
         final List<RouteInfo> allRoutes = getAllRoutes();
         // If we don't have a route to this IP address, it's not reachable.
@@ -1008,6 +1048,7 @@
      * @return {@code true} if both are identical, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isIdenticalInterfaceName(LinkProperties target) {
         return TextUtils.equals(getInterfaceName(), target.getInterfaceName());
     }
@@ -1019,6 +1060,7 @@
      * @return {@code true} if both are identical, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isIdenticalAddresses(LinkProperties target) {
         Collection<InetAddress> targetAddresses = target.getAddresses();
         Collection<InetAddress> sourceAddresses = getAddresses();
@@ -1033,6 +1075,7 @@
      * @return {@code true} if both are identical, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isIdenticalDnses(LinkProperties target) {
         Collection<InetAddress> targetDnses = target.getDnsServers();
         String targetDomains = target.getDomains();
@@ -1080,6 +1123,7 @@
      * @return {@code true} if both are identical, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isIdenticalRoutes(LinkProperties target) {
         Collection<RouteInfo> targetRoutes = target.getRoutes();
         return (mRoutes.size() == targetRoutes.size()) ?
@@ -1093,6 +1137,7 @@
      * @return {@code true} if both are identical, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isIdenticalHttpProxy(LinkProperties target) {
         return getHttpProxy() == null ? target.getHttpProxy() == null :
                 getHttpProxy().equals(target.getHttpProxy());
@@ -1105,6 +1150,7 @@
      * @return {@code true} if both are identical, {@code false} otherwise.
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean isIdenticalStackedLinks(LinkProperties target) {
         if (!mStackedLinks.keySet().equals(target.mStackedLinks.keySet())) {
             return false;
diff --git a/core/java/android/net/LinkQualityInfo.java b/core/java/android/net/LinkQualityInfo.java
index 9c8e61d..b6f8825 100644
--- a/core/java/android/net/LinkQualityInfo.java
+++ b/core/java/android/net/LinkQualityInfo.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -189,6 +190,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setPacketCount(long packetCount) {
         mPacketCount = packetCount;
     }
@@ -204,6 +206,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setPacketErrorCount(long packetErrorCount) {
         mPacketErrorCount = packetErrorCount;
     }
@@ -265,6 +268,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setLastDataSampleTime(long lastDataSampleTime) {
         mLastDataSampleTime = lastDataSampleTime;
     }
@@ -280,6 +284,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setDataSampleDuration(int dataSampleDuration) {
         mDataSampleDuration = dataSampleDuration;
     }
diff --git a/core/java/android/net/LocalSocket.java b/core/java/android/net/LocalSocket.java
index 8afa1ed..6a2031b 100644
--- a/core/java/android/net/LocalSocket.java
+++ b/core/java/android/net/LocalSocket.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import java.io.Closeable;
 import java.io.FileDescriptor;
 import java.io.IOException;
@@ -30,6 +31,7 @@
  */
 public class LocalSocket implements Closeable {
 
+    @UnsupportedAppUsage
     private final LocalSocketImpl impl;
     /** false if impl.create() needs to be called */
     private volatile boolean implCreated;
diff --git a/core/java/android/net/LocalSocketImpl.java b/core/java/android/net/LocalSocketImpl.java
index 6e4a231..fe7632c 100644
--- a/core/java/android/net/LocalSocketImpl.java
+++ b/core/java/android/net/LocalSocketImpl.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.system.ErrnoException;
 import android.system.Int32Ref;
 import android.system.Os;
@@ -47,8 +48,10 @@
 
     // These fields are accessed by native code;
     /** file descriptor array received during a previous read */
+    @UnsupportedAppUsage
     FileDescriptor[] inboundFileDescriptors;
     /** file descriptor array that should be written during next write */
+    @UnsupportedAppUsage
     FileDescriptor[] outboundFileDescriptors;
 
     /**
@@ -207,6 +210,7 @@
     /**
      * Create a new instance.
      */
+    @UnsupportedAppUsage
     /*package*/ LocalSocketImpl()
     {
     }
diff --git a/core/java/android/net/MacAddress.java b/core/java/android/net/MacAddress.java
index 74d6470..98f3567 100644
--- a/core/java/android/net/MacAddress.java
+++ b/core/java/android/net/MacAddress.java
@@ -18,6 +18,7 @@
 
 import android.annotation.IntDef;
 import android.annotation.NonNull;
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -50,6 +51,7 @@
      * The MacAddress zero MAC address.
      * @hide
      */
+    @UnsupportedAppUsage
     public static final MacAddress ALL_ZEROS_ADDRESS = new MacAddress(0);
 
     /** @hide */
diff --git a/core/java/android/net/MobileLinkQualityInfo.java b/core/java/android/net/MobileLinkQualityInfo.java
index a01fc80..06c739d 100644
--- a/core/java/android/net/MobileLinkQualityInfo.java
+++ b/core/java/android/net/MobileLinkQualityInfo.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 
 /**
@@ -93,6 +94,7 @@
      * returns mobile network type as defined by {@link android.telephony.TelephonyManager}
      * @return network type or {@link android.net.LinkQualityInfo#UNKNOWN_INT}
      */
+    @UnsupportedAppUsage
     public int getMobileNetworkType() {
         return mMobileNetworkType;
     }
@@ -100,6 +102,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setMobileNetworkType(int mobileNetworkType) {
         mMobileNetworkType = mobileNetworkType;
     }
@@ -115,6 +118,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setRssi(int Rssi) {
         mRssi = Rssi;
     }
@@ -130,6 +134,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setGsmErrorRate(int gsmErrorRate) {
         mGsmErrorRate = gsmErrorRate;
     }
@@ -145,6 +150,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setCdmaDbm(int cdmaDbm) {
         mCdmaDbm = cdmaDbm;
     }
@@ -160,6 +166,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setCdmaEcio(int cdmaEcio) {
         mCdmaEcio = cdmaEcio;
     }
@@ -175,6 +182,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setEvdoDbm(int evdoDbm) {
         mEvdoDbm = evdoDbm;
     }
@@ -190,6 +198,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setEvdoEcio(int evdoEcio) {
         mEvdoEcio = evdoEcio;
     }
@@ -205,6 +214,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setEvdoSnr(int evdoSnr) {
         mEvdoSnr = evdoSnr;
     }
@@ -220,6 +230,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setLteSignalStrength(int lteSignalStrength) {
         mLteSignalStrength = lteSignalStrength;
     }
@@ -235,6 +246,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setLteRsrp(int lteRsrp) {
         mLteRsrp = lteRsrp;
     }
@@ -250,6 +262,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setLteRsrq(int lteRsrq) {
         mLteRsrq = lteRsrq;
     }
@@ -265,6 +278,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setLteRssnr(int lteRssnr) {
         mLteRssnr = lteRssnr;
     }
@@ -280,6 +294,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setLteCqi(int lteCqi) {
         mLteCqi = lteCqi;
     }
diff --git a/core/java/android/net/Network.java b/core/java/android/net/Network.java
index 512e35e..142023d 100644
--- a/core/java/android/net/Network.java
+++ b/core/java/android/net/Network.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.system.ErrnoException;
@@ -59,6 +60,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public final int netId;
 
     // Objects used to perform per-network operations such as getSocketFactory
@@ -103,6 +105,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public Network(int netId) {
         this.netId = netId;
     }
diff --git a/core/java/android/net/NetworkAgent.java b/core/java/android/net/NetworkAgent.java
index e6b3fa8..114b423 100644
--- a/core/java/android/net/NetworkAgent.java
+++ b/core/java/android/net/NetworkAgent.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.net.ConnectivityManager.PacketKeepalive;
 import android.os.Bundle;
@@ -351,6 +352,7 @@
     /**
      * Called by the bearer code when it has new NetworkInfo data.
      */
+    @UnsupportedAppUsage
     public void sendNetworkInfo(NetworkInfo networkInfo) {
         queueOrSendMessage(EVENT_NETWORK_INFO_CHANGED, new NetworkInfo(networkInfo));
     }
diff --git a/core/java/android/net/NetworkCapabilities.java b/core/java/android/net/NetworkCapabilities.java
index 72b4bfd..fd1e5f2 100644
--- a/core/java/android/net/NetworkCapabilities.java
+++ b/core/java/android/net/NetworkCapabilities.java
@@ -19,6 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
+import android.annotation.UnsupportedAppUsage;
 import android.net.ConnectivityManager.NetworkCallback;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -56,6 +57,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public NetworkCapabilities() {
         clearAll();
         mNetworkCapabilities = DEFAULT_CAPABILITIES;
@@ -103,6 +105,7 @@
      * Represents the network's capabilities.  If any are specified they will be satisfied
      * by any Network that matches all of them.
      */
+    @UnsupportedAppUsage
     private long mNetworkCapabilities;
 
     /**
@@ -371,6 +374,7 @@
      * @return This NetworkCapabilities instance, to facilitate chaining.
      * @hide
      */
+    @UnsupportedAppUsage
     public NetworkCapabilities addCapability(@NetCapability int capability) {
         checkValidCapability(capability);
         mNetworkCapabilities |= 1 << capability;
@@ -407,6 +411,7 @@
      * @return This NetworkCapabilities instance, to facilitate chaining.
      * @hide
      */
+    @UnsupportedAppUsage
     public NetworkCapabilities removeCapability(@NetCapability int capability) {
         checkValidCapability(capability);
         final long mask = ~(1 << capability);
@@ -659,6 +664,7 @@
      * @return This NetworkCapabilities instance, to facilitate chaining.
      * @hide
      */
+    @UnsupportedAppUsage
     public NetworkCapabilities addTransportType(@Transport int transportType) {
         checkValidTransportType(transportType);
         mTransportTypes |= 1 << transportType;
@@ -898,6 +904,7 @@
      *         specifier. See {@link #setNetworkSpecifier}.
      * @hide
      */
+    @UnsupportedAppUsage
     public NetworkSpecifier getNetworkSpecifier() {
         return mNetworkSpecifier;
     }
@@ -930,6 +937,7 @@
      * Signal strength. This is a signed integer, and higher values indicate better signal.
      * The exact units are bearer-dependent. For example, Wi-Fi uses RSSI.
      */
+    @UnsupportedAppUsage
     private int mSignalStrength = SIGNAL_STRENGTH_UNSPECIFIED;
 
     /**
@@ -945,6 +953,7 @@
      * @param signalStrength the bearer-specific signal strength.
      * @hide
      */
+    @UnsupportedAppUsage
     public NetworkCapabilities setSignalStrength(int signalStrength) {
         mSignalStrength = signalStrength;
         return this;
@@ -955,6 +964,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean hasSignalStrength() {
         return mSignalStrength > SIGNAL_STRENGTH_UNSPECIFIED;
     }
@@ -965,6 +975,7 @@
      * @return The bearer-specific signal strength.
      * @hide
      */
+    @UnsupportedAppUsage
     public int getSignalStrength() {
         return mSignalStrength;
     }
@@ -1544,6 +1555,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public static String transportNamesOf(@Transport int[] types) {
         StringJoiner joiner = new StringJoiner("|");
         if (types != null) {
diff --git a/core/java/android/net/NetworkFactory.java b/core/java/android/net/NetworkFactory.java
index e2f8d1a..010d72f 100644
--- a/core/java/android/net/NetworkFactory.java
+++ b/core/java/android/net/NetworkFactory.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Handler;
 import android.os.Looper;
@@ -106,6 +107,7 @@
     private int mRefCount = 0;
     private Messenger mMessenger = null;
 
+    @UnsupportedAppUsage
     public NetworkFactory(Looper looper, Context context, String logTag,
             NetworkCapabilities filter) {
         super(looper);
@@ -287,6 +289,7 @@
         sendMessage(obtainMessage(CMD_CANCEL_REQUEST, networkRequest));
     }
 
+    @UnsupportedAppUsage
     public void setScoreFilter(int score) {
         sendMessage(obtainMessage(CMD_SET_SCORE, score, 0));
     }
@@ -304,6 +307,7 @@
         Log.d(LOG_TAG, s);
     }
 
+    @UnsupportedAppUsage
     public void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
         final IndentingPrintWriter pw = new IndentingPrintWriter(writer, "  ");
         pw.println(toString());
diff --git a/core/java/android/net/NetworkInfo.java b/core/java/android/net/NetworkInfo.java
index 999771a..d912dd10 100644
--- a/core/java/android/net/NetworkInfo.java
+++ b/core/java/android/net/NetworkInfo.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -129,6 +130,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public NetworkInfo(int type, int subtype, String typeName, String subtypeName) {
         if (!ConnectivityManager.isNetworkTypeValid(type)
                 && type != ConnectivityManager.TYPE_NONE) {
@@ -143,6 +145,7 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public NetworkInfo(NetworkInfo source) {
         if (source != null) {
             synchronized (source) {
@@ -209,6 +212,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public void setSubtype(int subtype, String subtypeName) {
         synchronized (this) {
             mSubtype = subtype;
@@ -317,6 +321,7 @@
      * @hide
      */
     @Deprecated
+    @UnsupportedAppUsage
     public void setIsAvailable(boolean isAvailable) {
         synchronized (this) {
             mIsAvailable = isAvailable;
@@ -347,6 +352,7 @@
      * @hide
      */
     @Deprecated
+    @UnsupportedAppUsage
     public void setFailover(boolean isFailover) {
         synchronized (this) {
             mIsFailover = isFailover;
@@ -377,6 +383,7 @@
      */
     @VisibleForTesting
     @Deprecated
+    @UnsupportedAppUsage
     public void setRoaming(boolean isRoaming) {
         synchronized (this) {
             mIsRoaming = isRoaming;
@@ -422,6 +429,7 @@
      * @hide
      */
     @Deprecated
+    @UnsupportedAppUsage
     public void setDetailedState(DetailedState detailedState, String reason, String extraInfo) {
         synchronized (this) {
             this.mDetailedState = detailedState;
diff --git a/core/java/android/net/NetworkPolicy.java b/core/java/android/net/NetworkPolicy.java
index e84c85e..f8973eb 100644
--- a/core/java/android/net/NetworkPolicy.java
+++ b/core/java/android/net/NetworkPolicy.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.BackupUtils;
@@ -49,14 +50,19 @@
     public static final long LIMIT_DISABLED = -1;
     public static final long SNOOZE_NEVER = -1;
 
+    @UnsupportedAppUsage
     public NetworkTemplate template;
     public RecurrenceRule cycleRule;
+    @UnsupportedAppUsage
     public long warningBytes = WARNING_DISABLED;
+    @UnsupportedAppUsage
     public long limitBytes = LIMIT_DISABLED;
     public long lastWarningSnooze = SNOOZE_NEVER;
     public long lastLimitSnooze = SNOOZE_NEVER;
     public long lastRapidSnooze = SNOOZE_NEVER;
+    @UnsupportedAppUsage
     @Deprecated public boolean metered = true;
+    @UnsupportedAppUsage
     public boolean inferred = false;
 
     private static final long DEFAULT_MTU = 1500;
@@ -77,6 +83,7 @@
     }
 
     @Deprecated
+    @UnsupportedAppUsage
     public NetworkPolicy(NetworkTemplate template, int cycleDay, String cycleTimezone,
             long warningBytes, long limitBytes, long lastWarningSnooze, long lastLimitSnooze,
             boolean metered, boolean inferred) {
@@ -143,6 +150,7 @@
     /**
      * Test if given measurement is over {@link #warningBytes}.
      */
+    @UnsupportedAppUsage
     public boolean isOverWarning(long totalBytes) {
         return warningBytes != WARNING_DISABLED && totalBytes >= warningBytes;
     }
@@ -151,6 +159,7 @@
      * Test if given measurement is near enough to {@link #limitBytes} to be
      * considered over-limit.
      */
+    @UnsupportedAppUsage
     public boolean isOverLimit(long totalBytes) {
         // over-estimate, since kernel will trigger limit once first packet
         // trips over limit.
@@ -161,6 +170,7 @@
     /**
      * Clear any existing snooze values, setting to {@link #SNOOZE_NEVER}.
      */
+    @UnsupportedAppUsage
     public void clearSnooze() {
         lastWarningSnooze = SNOOZE_NEVER;
         lastLimitSnooze = SNOOZE_NEVER;
@@ -175,6 +185,7 @@
     }
 
     @Override
+    @UnsupportedAppUsage
     public int compareTo(NetworkPolicy another) {
         if (another == null || another.limitBytes == LIMIT_DISABLED) {
             // other value is missing or disabled; we win
@@ -225,6 +236,7 @@
                 .append("}").toString();
     }
 
+    @UnsupportedAppUsage
     public static final Creator<NetworkPolicy> CREATOR = new Creator<NetworkPolicy>() {
         @Override
         public NetworkPolicy createFromParcel(Parcel in) {
diff --git a/core/java/android/net/NetworkPolicyManager.java b/core/java/android/net/NetworkPolicyManager.java
index 75fd77e..d5fb2e7 100644
--- a/core/java/android/net/NetworkPolicyManager.java
+++ b/core/java/android/net/NetworkPolicyManager.java
@@ -19,6 +19,7 @@
 import static android.content.pm.PackageManager.GET_SIGNATURES;
 
 import android.annotation.SystemService;
+import android.annotation.UnsupportedAppUsage;
 import android.app.ActivityManager;
 import android.content.Context;
 import android.content.Intent;
@@ -121,6 +122,7 @@
     public static final int OVERRIDE_CONGESTED = 1 << 1;
 
     private final Context mContext;
+    @UnsupportedAppUsage
     private INetworkPolicyManager mService;
 
     public NetworkPolicyManager(Context context, INetworkPolicyManager service) {
@@ -131,6 +133,7 @@
         mService = service;
     }
 
+    @UnsupportedAppUsage
     public static NetworkPolicyManager from(Context context) {
         return (NetworkPolicyManager) context.getSystemService(Context.NETWORK_POLICY_SERVICE);
     }
@@ -141,6 +144,7 @@
      * @param policy should be {@link #POLICY_NONE} or any combination of {@code POLICY_} flags,
      *     although it is not validated.
      */
+    @UnsupportedAppUsage
     public void setUidPolicy(int uid, int policy) {
         try {
             mService.setUidPolicy(uid, policy);
@@ -181,6 +185,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public int getUidPolicy(int uid) {
         try {
             return mService.getUidPolicy(uid);
@@ -189,6 +194,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public int[] getUidsWithPolicy(int policy) {
         try {
             return mService.getUidsWithPolicy(policy);
@@ -197,6 +203,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public void registerListener(INetworkPolicyListener listener) {
         try {
             mService.registerListener(listener);
@@ -205,6 +212,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public void unregisterListener(INetworkPolicyListener listener) {
         try {
             mService.unregisterListener(listener);
@@ -221,6 +229,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public NetworkPolicy[] getNetworkPolicies() {
         try {
             return mService.getNetworkPolicies(mContext.getOpPackageName());
@@ -229,6 +238,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public void setRestrictBackground(boolean restrictBackground) {
         try {
             mService.setRestrictBackground(restrictBackground);
@@ -237,6 +247,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public boolean getRestrictBackground() {
         try {
             return mService.getRestrictBackground();
diff --git a/core/java/android/net/NetworkQuotaInfo.java b/core/java/android/net/NetworkQuotaInfo.java
index b95f1d9..e7182f7 100644
--- a/core/java/android/net/NetworkQuotaInfo.java
+++ b/core/java/android/net/NetworkQuotaInfo.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -36,14 +37,17 @@
     public NetworkQuotaInfo(Parcel in) {
     }
 
+    @UnsupportedAppUsage
     public long getEstimatedBytes() {
         return 0;
     }
 
+    @UnsupportedAppUsage
     public long getSoftLimitBytes() {
         return NO_LIMIT;
     }
 
+    @UnsupportedAppUsage
     public long getHardLimitBytes() {
         return NO_LIMIT;
     }
@@ -57,6 +61,7 @@
     public void writeToParcel(Parcel out, int flags) {
     }
 
+    @UnsupportedAppUsage
     public static final Creator<NetworkQuotaInfo> CREATOR = new Creator<NetworkQuotaInfo>() {
         @Override
         public NetworkQuotaInfo createFromParcel(Parcel in) {
diff --git a/core/java/android/net/NetworkRequest.java b/core/java/android/net/NetworkRequest.java
index 16c2342..04b6b44 100644
--- a/core/java/android/net/NetworkRequest.java
+++ b/core/java/android/net/NetworkRequest.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.NonNull;
+import android.annotation.UnsupportedAppUsage;
 import android.net.NetworkCapabilities.NetCapability;
 import android.net.NetworkCapabilities.Transport;
 import android.os.Parcel;
@@ -38,6 +39,7 @@
      * The {@link NetworkCapabilities} that define this request.
      * @hide
      */
+    @UnsupportedAppUsage
     public final @NonNull NetworkCapabilities networkCapabilities;
 
     /**
@@ -46,6 +48,7 @@
      * the request.
      * @hide
      */
+    @UnsupportedAppUsage
     public final int requestId;
 
     /**
@@ -53,6 +56,7 @@
      * Causes CONNECTIVITY_ACTION broadcasts to be sent.
      * @hide
      */
+    @UnsupportedAppUsage
     public final int legacyType;
 
     /**
@@ -241,6 +245,7 @@
          * @return The builder to facilitate chaining.
          * @hide
          */
+        @UnsupportedAppUsage
         public Builder clearCapabilities() {
             mNetworkCapabilities.clearAll();
             return this;
@@ -339,6 +344,7 @@
          * @param signalStrength the bearer-specific signal strength.
          * @hide
          */
+        @UnsupportedAppUsage
         public Builder setSignalStrength(int signalStrength) {
             mNetworkCapabilities.setSignalStrength(signalStrength);
             return this;
diff --git a/core/java/android/net/NetworkState.java b/core/java/android/net/NetworkState.java
index 321f971..c545ee2 100644
--- a/core/java/android/net/NetworkState.java
+++ b/core/java/android/net/NetworkState.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.Slog;
@@ -33,6 +34,7 @@
     public final NetworkInfo networkInfo;
     public final LinkProperties linkProperties;
     public final NetworkCapabilities networkCapabilities;
+    @UnsupportedAppUsage
     public final Network network;
     public final String subscriberId;
     public final String networkId;
@@ -58,6 +60,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public NetworkState(Parcel in) {
         networkInfo = in.readParcelable(null);
         linkProperties = in.readParcelable(null);
@@ -82,6 +85,7 @@
         out.writeString(networkId);
     }
 
+    @UnsupportedAppUsage
     public static final Creator<NetworkState> CREATOR = new Creator<NetworkState>() {
         @Override
         public NetworkState createFromParcel(Parcel in) {
diff --git a/core/java/android/net/NetworkStats.java b/core/java/android/net/NetworkStats.java
index edf9bc1..e270fc2 100644
--- a/core/java/android/net/NetworkStats.java
+++ b/core/java/android/net/NetworkStats.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.os.SystemClock;
@@ -110,25 +111,43 @@
      * generated.
      */
     private long elapsedRealtime;
+    @UnsupportedAppUsage
     private int size;
+    @UnsupportedAppUsage
     private int capacity;
+    @UnsupportedAppUsage
     private String[] iface;
+    @UnsupportedAppUsage
     private int[] uid;
+    @UnsupportedAppUsage
     private int[] set;
+    @UnsupportedAppUsage
     private int[] tag;
+    @UnsupportedAppUsage
     private int[] metered;
+    @UnsupportedAppUsage
     private int[] roaming;
+    @UnsupportedAppUsage
     private int[] defaultNetwork;
+    @UnsupportedAppUsage
     private long[] rxBytes;
+    @UnsupportedAppUsage
     private long[] rxPackets;
+    @UnsupportedAppUsage
     private long[] txBytes;
+    @UnsupportedAppUsage
     private long[] txPackets;
+    @UnsupportedAppUsage
     private long[] operations;
 
     public static class Entry {
+        @UnsupportedAppUsage
         public String iface;
+        @UnsupportedAppUsage
         public int uid;
+        @UnsupportedAppUsage
         public int set;
+        @UnsupportedAppUsage
         public int tag;
         /**
          * Note that this is only populated w/ the default value when read from /proc or written
@@ -148,12 +167,17 @@
          * getSummary().
          */
         public int defaultNetwork;
+        @UnsupportedAppUsage
         public long rxBytes;
+        @UnsupportedAppUsage
         public long rxPackets;
+        @UnsupportedAppUsage
         public long txBytes;
+        @UnsupportedAppUsage
         public long txPackets;
         public long operations;
 
+        @UnsupportedAppUsage
         public Entry() {
             this(IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0L);
         }
@@ -240,6 +264,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public NetworkStats(long elapsedRealtime, int initialSize) {
         this.elapsedRealtime = elapsedRealtime;
         this.size = 0;
@@ -263,6 +288,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public NetworkStats(Parcel parcel) {
         elapsedRealtime = parcel.readLong();
         size = parcel.readInt();
@@ -399,6 +425,7 @@
     /**
      * Return specific stats entry.
      */
+    @UnsupportedAppUsage
     public Entry getValues(int i, Entry recycle) {
         final Entry entry = recycle != null ? recycle : new Entry();
         entry.iface = iface[i];
@@ -432,6 +459,7 @@
         return SystemClock.elapsedRealtime() - elapsedRealtime;
     }
 
+    @UnsupportedAppUsage
     public int size() {
         return size;
     }
@@ -460,6 +488,7 @@
      * {@link #findIndex(String, int, int, int, int)} is unable to find match. Can
      * also be used to subtract values from existing rows.
      */
+    @UnsupportedAppUsage
     public NetworkStats combineValues(Entry entry) {
         final int i = findIndex(entry.iface, entry.uid, entry.set, entry.tag, entry.metered,
                 entry.roaming, entry.defaultNetwork);
@@ -479,6 +508,7 @@
     /**
      * Combine all values from another {@link NetworkStats} into this object.
      */
+    @UnsupportedAppUsage
     public void combineAllValues(NetworkStats another) {
         NetworkStats.Entry entry = null;
         for (int i = 0; i < another.size; i++) {
@@ -564,6 +594,7 @@
     /**
      * Return list of unique UIDs known by this data structure.
      */
+    @UnsupportedAppUsage
     public int[] getUniqueUids() {
         final SparseBooleanArray uids = new SparseBooleanArray();
         for (int uid : this.uid) {
@@ -582,6 +613,7 @@
      * Return total bytes represented by this snapshot object, usually used when
      * checking if a {@link #subtract(NetworkStats)} delta passes a threshold.
      */
+    @UnsupportedAppUsage
     public long getTotalBytes() {
         final Entry entry = getTotal(null);
         return entry.rxBytes + entry.txBytes;
@@ -590,6 +622,7 @@
     /**
      * Return total of all fields represented by this snapshot object.
      */
+    @UnsupportedAppUsage
     public Entry getTotal(Entry recycle) {
         return getTotal(recycle, null, UID_ALL, false);
     }
@@ -598,6 +631,7 @@
      * Return total of all fields represented by this snapshot object matching
      * the requested {@link #uid}.
      */
+    @UnsupportedAppUsage
     public Entry getTotal(Entry recycle, int limitUid) {
         return getTotal(recycle, null, limitUid, false);
     }
@@ -610,6 +644,7 @@
         return getTotal(recycle, limitIface, UID_ALL, false);
     }
 
+    @UnsupportedAppUsage
     public Entry getTotalIncludingTags(Entry recycle) {
         return getTotal(recycle, null, UID_ALL, true);
     }
@@ -1085,6 +1120,7 @@
         return 0;
     }
 
+    @UnsupportedAppUsage
     public static final Creator<NetworkStats> CREATOR = new Creator<NetworkStats>() {
         @Override
         public NetworkStats createFromParcel(Parcel in) {
diff --git a/core/java/android/net/NetworkStatsHistory.java b/core/java/android/net/NetworkStatsHistory.java
index a13ad65..d53e032 100644
--- a/core/java/android/net/NetworkStatsHistory.java
+++ b/core/java/android/net/NetworkStatsHistory.java
@@ -30,6 +30,7 @@
 
 import static com.android.internal.util.ArrayUtils.total;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.service.NetworkStatsHistoryBucketProto;
@@ -89,16 +90,23 @@
     public static class Entry {
         public static final long UNKNOWN = -1;
 
+        @UnsupportedAppUsage
         public long bucketDuration;
+        @UnsupportedAppUsage
         public long bucketStart;
         public long activeTime;
+        @UnsupportedAppUsage
         public long rxBytes;
+        @UnsupportedAppUsage
         public long rxPackets;
+        @UnsupportedAppUsage
         public long txBytes;
+        @UnsupportedAppUsage
         public long txPackets;
         public long operations;
     }
 
+    @UnsupportedAppUsage
     public NetworkStatsHistory(long bucketDuration) {
         this(bucketDuration, 10, FIELD_ALL);
     }
@@ -125,6 +133,7 @@
         recordEntireHistory(existing);
     }
 
+    @UnsupportedAppUsage
     public NetworkStatsHistory(Parcel in) {
         bucketDuration = in.readLong();
         bucketStart = readLongArray(in);
@@ -210,6 +219,7 @@
         return 0;
     }
 
+    @UnsupportedAppUsage
     public int size() {
         return bucketCount;
     }
@@ -218,6 +228,7 @@
         return bucketDuration;
     }
 
+    @UnsupportedAppUsage
     public long getStart() {
         if (bucketCount > 0) {
             return bucketStart[0];
@@ -226,6 +237,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public long getEnd() {
         if (bucketCount > 0) {
             return bucketStart[bucketCount - 1] + bucketDuration;
@@ -245,6 +257,7 @@
      * Return index of bucket that contains or is immediately before the
      * requested time.
      */
+    @UnsupportedAppUsage
     public int getIndexBefore(long time) {
         int index = Arrays.binarySearch(bucketStart, 0, bucketCount, time);
         if (index < 0) {
@@ -272,6 +285,7 @@
     /**
      * Return specific stats entry.
      */
+    @UnsupportedAppUsage
     public Entry getValues(int i, Entry recycle) {
         final Entry entry = recycle != null ? recycle : new Entry();
         entry.bucketStart = bucketStart[i];
@@ -373,6 +387,7 @@
      * Record an entire {@link NetworkStatsHistory} into this history. Usually
      * for combining together stats for external reporting.
      */
+    @UnsupportedAppUsage
     public void recordEntireHistory(NetworkStatsHistory input) {
         recordHistory(input, Long.MIN_VALUE, Long.MAX_VALUE);
     }
@@ -509,6 +524,7 @@
      * Return interpolated data usage across the requested range. Interpolates
      * across buckets, so values may be rounded slightly.
      */
+    @UnsupportedAppUsage
     public Entry getValues(long start, long end, Entry recycle) {
         return getValues(start, end, Long.MAX_VALUE, recycle);
     }
@@ -517,6 +533,7 @@
      * Return interpolated data usage across the requested range. Interpolates
      * across buckets, so values may be rounded slightly.
      */
+    @UnsupportedAppUsage
     public Entry getValues(long start, long end, long now, Entry recycle) {
         final Entry entry = recycle != null ? recycle : new Entry();
         entry.bucketDuration = end - start;
@@ -701,6 +718,7 @@
         return writer.toString();
     }
 
+    @UnsupportedAppUsage
     public static final Creator<NetworkStatsHistory> CREATOR = new Creator<NetworkStatsHistory>() {
         @Override
         public NetworkStatsHistory createFromParcel(Parcel in) {
diff --git a/core/java/android/net/NetworkTemplate.java b/core/java/android/net/NetworkTemplate.java
index 74233fd..bb75c63 100644
--- a/core/java/android/net/NetworkTemplate.java
+++ b/core/java/android/net/NetworkTemplate.java
@@ -34,6 +34,7 @@
 import static android.net.NetworkStats.ROAMING_YES;
 import static android.net.wifi.WifiInfo.removeDoubleQuotes;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.BackupUtils;
@@ -96,6 +97,7 @@
      * Template to match {@link ConnectivityManager#TYPE_MOBILE} networks with
      * the given IMSI.
      */
+    @UnsupportedAppUsage
     public static NetworkTemplate buildTemplateMobileAll(String subscriberId) {
         return new NetworkTemplate(MATCH_MOBILE, subscriberId, null);
     }
@@ -104,6 +106,7 @@
      * Template to match {@link ConnectivityManager#TYPE_MOBILE} networks,
      * regardless of IMSI.
      */
+    @UnsupportedAppUsage
     public static NetworkTemplate buildTemplateMobileWildcard() {
         return new NetworkTemplate(MATCH_MOBILE_WILDCARD, null, null);
     }
@@ -112,11 +115,13 @@
      * Template to match all {@link ConnectivityManager#TYPE_WIFI} networks,
      * regardless of SSID.
      */
+    @UnsupportedAppUsage
     public static NetworkTemplate buildTemplateWifiWildcard() {
         return new NetworkTemplate(MATCH_WIFI_WILDCARD, null, null);
     }
 
     @Deprecated
+    @UnsupportedAppUsage
     public static NetworkTemplate buildTemplateWifi() {
         return buildTemplateWifiWildcard();
     }
@@ -133,6 +138,7 @@
      * Template to combine all {@link ConnectivityManager#TYPE_ETHERNET} style
      * networks together.
      */
+    @UnsupportedAppUsage
     public static NetworkTemplate buildTemplateEthernet() {
         return new NetworkTemplate(MATCH_ETHERNET, null, null);
     }
@@ -173,6 +179,7 @@
     private final int mRoaming;
     private final int mDefaultNetwork;
 
+    @UnsupportedAppUsage
     public NetworkTemplate(int matchRule, String subscriberId, String networkId) {
         this(matchRule, subscriberId, new String[] { subscriberId }, networkId);
     }
@@ -293,10 +300,12 @@
         }
     }
 
+    @UnsupportedAppUsage
     public int getMatchRule() {
         return mMatchRule;
     }
 
+    @UnsupportedAppUsage
     public String getSubscriberId() {
         return mSubscriberId;
     }
@@ -460,6 +469,7 @@
      * active merge set [A,B], we'd return a new template that primarily matches
      * A, but also matches B.
      */
+    @UnsupportedAppUsage
     public static NetworkTemplate normalize(NetworkTemplate template, String[] merged) {
         if (template.isMatchRuleMobile() && ArrayUtils.contains(merged, template.mSubscriberId)) {
             // Requested template subscriber is part of the merge group; return
@@ -471,6 +481,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     public static final Creator<NetworkTemplate> CREATOR = new Creator<NetworkTemplate>() {
         @Override
         public NetworkTemplate createFromParcel(Parcel in) {
diff --git a/core/java/android/net/NetworkUtils.java b/core/java/android/net/NetworkUtils.java
index dc1f805..599ccb2 100644
--- a/core/java/android/net/NetworkUtils.java
+++ b/core/java/android/net/NetworkUtils.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.util.Log;
 import android.util.Pair;
@@ -43,6 +44,7 @@
     /**
      * Attaches a socket filter that accepts DHCP packets to the given socket.
      */
+    @UnsupportedAppUsage
     public native static void attachDhcpFilter(FileDescriptor fd) throws SocketException;
 
     /**
@@ -50,6 +52,7 @@
      * @param fd the socket's {@link FileDescriptor}.
      * @param packetType the hardware address type, one of ARPHRD_*.
      */
+    @UnsupportedAppUsage
     public native static void attachRaFilter(FileDescriptor fd, int packetType) throws SocketException;
 
     /**
@@ -60,6 +63,7 @@
      * @param fd the socket's {@link FileDescriptor}.
      * @param packetType the hardware address type, one of ARPHRD_*.
      */
+    @UnsupportedAppUsage
     public native static void attachControlPacketFilter(FileDescriptor fd, int packetType)
             throws SocketException;
 
@@ -108,6 +112,7 @@
      * this socket will go directly to the underlying network, so its traffic will not be
      * forwarded through the VPN.
      */
+    @UnsupportedAppUsage
     public static boolean protectFromVpn(FileDescriptor fd) {
         return protectFromVpn(fd.getInt$());
     }
@@ -131,6 +136,7 @@
      *             or {@link #intToInet4AddressHTL(int)}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static InetAddress intToInetAddress(int hostAddress) {
         return intToInet4AddressHTL(hostAddress);
     }
@@ -209,6 +215,7 @@
      *             or {@link #prefixLengthToV4NetmaskIntHTL(int)}
      */
     @Deprecated
+    @UnsupportedAppUsage
     public static int prefixLengthToNetmaskInt(int prefixLength)
             throws IllegalArgumentException {
         return prefixLengthToV4NetmaskIntHTL(prefixLength);
@@ -255,6 +262,7 @@
      * @throws IllegalArgumentException the specified netmask was not contiguous.
      * @hide
      */
+    @UnsupportedAppUsage
     public static int netmaskToPrefixLength(Inet4Address netmask) {
         // inetAddressToInt returns an int in *network* byte order.
         int i = Integer.reverseBytes(inetAddressToInt(netmask));
@@ -275,6 +283,7 @@
      * @return the InetAddress
      * @hide
      */
+    @UnsupportedAppUsage
     public static InetAddress numericToInetAddress(String addrString)
             throws IllegalArgumentException {
         return InetAddress.parseNumericAddress(addrString);
@@ -349,6 +358,7 @@
     /**
      * Returns the implicit netmask of an IPv4 address, as was the custom before 1993.
      */
+    @UnsupportedAppUsage
     public static int getImplicitNetmask(Inet4Address address) {
         int firstByte = address.getAddress()[0] & 0xff;  // Convert to an unsigned value.
         if (firstByte < 128) {
@@ -439,6 +449,7 @@
      * @param addr a string representing an ip addr
      * @return a string propertly trimmed
      */
+    @UnsupportedAppUsage
     public static String trimV4AddrZeros(String addr) {
         if (addr == null) return null;
         String[] octets = addr.split("\\.");
diff --git a/core/java/android/net/Proxy.java b/core/java/android/net/Proxy.java
index e3551b0..4600942 100644
--- a/core/java/android/net/Proxy.java
+++ b/core/java/android/net/Proxy.java
@@ -18,6 +18,7 @@
 
 import android.annotation.SdkConstant;
 import android.annotation.SdkConstant.SdkConstantType;
+import android.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.text.TextUtils;
 import android.util.Log;
@@ -106,6 +107,7 @@
      *         A null value means that no host is to be used.
      * {@hide}
      */
+    @UnsupportedAppUsage
     public static final java.net.Proxy getProxy(Context ctx, String url) {
         String host = "";
         if ((url != null) && !isLocalHost(host)) {
@@ -239,6 +241,7 @@
     }
 
     /** @hide */
+    @UnsupportedAppUsage
     public static final void setHttpProxySystemProperty(ProxyInfo p) {
         String host = null;
         String port = null;
diff --git a/core/java/android/net/ProxyInfo.java b/core/java/android/net/ProxyInfo.java
index 5f5e623..e926fda 100644
--- a/core/java/android/net/ProxyInfo.java
+++ b/core/java/android/net/ProxyInfo.java
@@ -17,6 +17,7 @@
 package android.net;
 
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
@@ -91,6 +92,7 @@
      * Create a ProxyProperties that points at a HTTP Proxy.
      * @hide
      */
+    @UnsupportedAppUsage
     public ProxyInfo(String host, int port, String exclList) {
         mHost = host;
         mPort = port;
diff --git a/core/java/android/net/RouteInfo.java b/core/java/android/net/RouteInfo.java
index 90a2460..3e73d3d 100644
--- a/core/java/android/net/RouteInfo.java
+++ b/core/java/android/net/RouteInfo.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -55,6 +56,7 @@
     /**
      * The gateway address for this route.
      */
+    @UnsupportedAppUsage
     private final InetAddress mGateway;
 
     /**
@@ -79,6 +81,7 @@
 
     // Derived data members.
     // TODO: remove these.
+    @UnsupportedAppUsage
     private final boolean mIsHost;
     private final boolean mHasGateway;
 
@@ -160,6 +163,7 @@
     /**
      *  @hide
      */
+    @UnsupportedAppUsage
     public RouteInfo(IpPrefix destination, InetAddress gateway, String iface) {
         this(destination, gateway, iface, RTN_UNICAST);
     }
@@ -167,6 +171,7 @@
     /**
      * @hide
      */
+    @UnsupportedAppUsage
     public RouteInfo(LinkAddress destination, InetAddress gateway, String iface) {
         this(destination == null ? null :
                 new IpPrefix(destination.getAddress(), destination.getPrefixLength()),
@@ -197,6 +202,7 @@
      *
      * TODO: Remove this.
      */
+    @UnsupportedAppUsage
     public RouteInfo(LinkAddress destination, InetAddress gateway) {
         this(destination, gateway, null);
     }
@@ -208,6 +214,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public RouteInfo(InetAddress gateway) {
         this((IpPrefix) null, gateway, null);
     }
@@ -258,6 +265,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     private boolean isHost() {
         return (mDestination.getAddress() instanceof Inet4Address &&
                 mDestination.getPrefixLength() == 32) ||
@@ -355,6 +363,7 @@
      * @return {@code true} if a gateway is specified
      * @hide
      */
+    @UnsupportedAppUsage
     public boolean hasGateway() {
         return mHasGateway;
     }
@@ -379,6 +388,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public static RouteInfo selectBestRoute(Collection<RouteInfo> routes, InetAddress dest) {
         if ((routes == null) || (dest == null)) return null;
 
diff --git a/core/java/android/net/SSLCertificateSocketFactory.java b/core/java/android/net/SSLCertificateSocketFactory.java
index d7eb477..31494d9 100644
--- a/core/java/android/net/SSLCertificateSocketFactory.java
+++ b/core/java/android/net/SSLCertificateSocketFactory.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.SystemProperties;
 import android.util.Log;
 
@@ -86,8 +87,10 @@
  * requires root access.
  */
 public class SSLCertificateSocketFactory extends SSLSocketFactory {
+    @UnsupportedAppUsage
     private static final String TAG = "SSLCertificateSocketFactory";
 
+    @UnsupportedAppUsage
     private static final TrustManager[] INSECURE_TRUST_MANAGER = new TrustManager[] {
         new X509TrustManager() {
             public X509Certificate[] getAcceptedIssuers() { return null; }
@@ -96,16 +99,26 @@
         }
     };
 
+    @UnsupportedAppUsage
     private SSLSocketFactory mInsecureFactory = null;
+    @UnsupportedAppUsage
     private SSLSocketFactory mSecureFactory = null;
+    @UnsupportedAppUsage
     private TrustManager[] mTrustManagers = null;
+    @UnsupportedAppUsage
     private KeyManager[] mKeyManagers = null;
+    @UnsupportedAppUsage
     private byte[] mNpnProtocols = null;
+    @UnsupportedAppUsage
     private byte[] mAlpnProtocols = null;
+    @UnsupportedAppUsage
     private PrivateKey mChannelIdPrivateKey = null;
 
+    @UnsupportedAppUsage
     private final int mHandshakeTimeoutMillis;
+    @UnsupportedAppUsage
     private final SSLClientSessionCache mSessionCache;
+    @UnsupportedAppUsage
     private final boolean mSecure;
 
     /** @deprecated Use {@link #getDefault(int)} instead. */
@@ -114,6 +127,7 @@
         this(handshakeTimeoutMillis, null, true);
     }
 
+    @UnsupportedAppUsage
     private SSLCertificateSocketFactory(
             int handshakeTimeoutMillis, SSLSessionCache cache, boolean secure) {
         mHandshakeTimeoutMillis = handshakeTimeoutMillis;
@@ -201,6 +215,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public static void verifyHostname(Socket socket, String hostname) throws IOException {
         if (!(socket instanceof SSLSocket)) {
             throw new IllegalArgumentException("Attempt to verify non-SSL socket");
@@ -222,6 +237,7 @@
         }
     }
 
+    @UnsupportedAppUsage
     private SSLSocketFactory makeSocketFactory(
             KeyManager[] keyManagers, TrustManager[] trustManagers) {
         try {
@@ -235,11 +251,13 @@
         }
     }
 
+    @UnsupportedAppUsage
     private static boolean isSslCheckRelaxed() {
         return RoSystemProperties.DEBUGGABLE &&
             SystemProperties.getBoolean("socket.relaxsslcheck", false);
     }
 
+    @UnsupportedAppUsage
     private synchronized SSLSocketFactory getDelegate() {
         // Relax the SSL check if instructed (for this factory, or systemwide)
         if (!mSecure || isSslCheckRelaxed()) {
@@ -311,6 +329,7 @@
      *     must be non-empty and of length less than 256.
      * @hide
      */
+    @UnsupportedAppUsage
     public void setAlpnProtocols(byte[][] protocols) {
         this.mAlpnProtocols = toLengthPrefixedList(protocols);
     }
@@ -365,6 +384,7 @@
      * @throws IllegalArgumentException if the socket was not created by this factory.
      * @hide
      */
+    @UnsupportedAppUsage
     public byte[] getAlpnSelectedProtocol(Socket socket) {
         return castToOpenSSLSocket(socket).getAlpnSelectedProtocol();
     }
@@ -390,6 +410,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public void setChannelIdPrivateKey(PrivateKey privateKey) {
         mChannelIdPrivateKey = privateKey;
     }
@@ -429,11 +450,13 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public void setSoWriteTimeout(Socket socket, int writeTimeoutMilliseconds)
             throws SocketException {
         castToOpenSSLSocket(socket).setSoWriteTimeout(writeTimeoutMilliseconds);
     }
 
+    @UnsupportedAppUsage
     private static OpenSSLSocketImpl castToOpenSSLSocket(Socket socket) {
         if (!(socket instanceof OpenSSLSocketImpl)) {
             throw new IllegalArgumentException("Socket not created by this factory: "
diff --git a/core/java/android/net/SSLSessionCache.java b/core/java/android/net/SSLSessionCache.java
index 65db2c3..9667e82 100644
--- a/core/java/android/net/SSLSessionCache.java
+++ b/core/java/android/net/SSLSessionCache.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.util.Log;
 
@@ -39,6 +40,7 @@
  */
 public final class SSLSessionCache {
     private static final String TAG = "SSLSessionCache";
+    @UnsupportedAppUsage
     /* package */ final SSLClientSessionCache mSessionCache;
 
     /**
diff --git a/core/java/android/net/SntpClient.java b/core/java/android/net/SntpClient.java
index ddf63ca..10c0ce2 100644
--- a/core/java/android/net/SntpClient.java
+++ b/core/java/android/net/SntpClient.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.SystemClock;
 import android.util.Log;
 
@@ -175,6 +176,7 @@
     }
 
     @Deprecated
+    @UnsupportedAppUsage
     public boolean requestTime(String host, int timeout) {
         Log.w(TAG, "Shame on you for calling the hidden API requestTime()!");
         return false;
@@ -185,6 +187,7 @@
      *
      * @return time value computed from NTP server response.
      */
+    @UnsupportedAppUsage
     public long getNtpTime() {
         return mNtpTime;
     }
@@ -195,6 +198,7 @@
      *
      * @return reference clock corresponding to the NTP time.
      */
+    @UnsupportedAppUsage
     public long getNtpTimeReference() {
         return mNtpTimeReference;
     }
@@ -204,6 +208,7 @@
      *
      * @return round trip time in milliseconds.
      */
+    @UnsupportedAppUsage
     public long getRoundTripTime() {
         return mRoundTripTime;
     }
diff --git a/core/java/android/net/StaticIpConfiguration.java b/core/java/android/net/StaticIpConfiguration.java
index 58b1b88..3aa56b9 100644
--- a/core/java/android/net/StaticIpConfiguration.java
+++ b/core/java/android/net/StaticIpConfiguration.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.net.LinkAddress;
 import android.os.Parcelable;
 import android.os.Parcel;
@@ -46,11 +47,16 @@
  * @hide
  */
 public class StaticIpConfiguration implements Parcelable {
+    @UnsupportedAppUsage
     public LinkAddress ipAddress;
+    @UnsupportedAppUsage
     public InetAddress gateway;
+    @UnsupportedAppUsage
     public final ArrayList<InetAddress> dnsServers;
+    @UnsupportedAppUsage
     public String domains;
 
+    @UnsupportedAppUsage
     public StaticIpConfiguration() {
         dnsServers = new ArrayList<InetAddress>();
     }
@@ -80,6 +86,7 @@
      * route to the gateway as well. This configuration is arguably invalid, but it used to work
      * in K and earlier, and other OSes appear to accept it.
      */
+    @UnsupportedAppUsage
     public List<RouteInfo> getRoutes(String iface) {
         List<RouteInfo> routes = new ArrayList<RouteInfo>(3);
         if (ipAddress != null) {
diff --git a/core/java/android/net/StringNetworkSpecifier.java b/core/java/android/net/StringNetworkSpecifier.java
index cb7f6bf..b5d12f9 100644
--- a/core/java/android/net/StringNetworkSpecifier.java
+++ b/core/java/android/net/StringNetworkSpecifier.java
@@ -16,6 +16,7 @@
 
 package android.net;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
@@ -29,6 +30,7 @@
     /**
      * Arbitrary string used to pass (additional) information to the network factory.
      */
+    @UnsupportedAppUsage
     public final String specifier;
 
     public StringNetworkSpecifier(String specifier) {
diff --git a/core/java/android/net/TrafficStats.java b/core/java/android/net/TrafficStats.java
index 40d53b7..44f7e48 100644
--- a/core/java/android/net/TrafficStats.java
+++ b/core/java/android/net/TrafficStats.java
@@ -19,6 +19,7 @@
 import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
+import android.annotation.UnsupportedAppUsage;
 import android.app.DownloadManager;
 import android.app.backup.BackupManager;
 import android.app.usage.NetworkStatsManager;
@@ -141,6 +142,7 @@
 
     private static INetworkStatsService sStatsService;
 
+    @UnsupportedAppUsage
     private synchronized static INetworkStatsService getStatsService() {
         if (sStatsService == null) {
             sStatsService = INetworkStatsService.Stub.asInterface(
@@ -528,6 +530,7 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public static long getMobileTcpRxPackets() {
         long total = 0;
         for (String iface : getMobileIfaces()) {
@@ -543,6 +546,7 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public static long getMobileTcpTxPackets() {
         long total = 0;
         for (String iface : getMobileIfaces()) {
@@ -576,6 +580,7 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public static long getTxBytes(String iface) {
         try {
             return getStatsService().getIfaceStats(iface, TYPE_TX_BYTES);
@@ -585,6 +590,7 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public static long getRxBytes(String iface) {
         try {
             return getStatsService().getIfaceStats(iface, TYPE_RX_BYTES);
@@ -940,6 +946,7 @@
      * Interfaces are never removed from this list, so counters should always be
      * monotonic.
      */
+    @UnsupportedAppUsage
     private static String[] getMobileIfaces() {
         try {
             return getStatsService().getMobileIfaces();
diff --git a/core/java/android/net/Uri.java b/core/java/android/net/Uri.java
index b7f5cdf..9bcc600 100644
--- a/core/java/android/net/Uri.java
+++ b/core/java/android/net/Uri.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.Nullable;
+import android.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.os.Environment;
 import android.os.Parcel;
@@ -133,6 +134,7 @@
     /**
      * Prevents external subclassing.
      */
+    @UnsupportedAppUsage
     private Uri() {}
 
     /**
@@ -376,6 +378,7 @@
      * to logs and other places where PII should be avoided.
      * @hide
      */
+    @UnsupportedAppUsage
     public String toSafeString() {
         String scheme = getScheme();
         String ssp = getSchemeSpecificPart();
@@ -2331,6 +2334,7 @@
      *
      * @hide
      */
+    @UnsupportedAppUsage
     public Uri getCanonicalUri() {
         if ("file".equals(getScheme())) {
             final String canonicalPath;
diff --git a/core/java/android/net/VpnService.java b/core/java/android/net/VpnService.java
index 712576f..f0c0462 100644
--- a/core/java/android/net/VpnService.java
+++ b/core/java/android/net/VpnService.java
@@ -21,6 +21,7 @@
 
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
+import android.annotation.UnsupportedAppUsage;
 import android.app.Activity;
 import android.app.PendingIntent;
 import android.app.Service;
@@ -440,7 +441,9 @@
     public class Builder {
 
         private final VpnConfig mConfig = new VpnConfig();
+        @UnsupportedAppUsage
         private final List<LinkAddress> mAddresses = new ArrayList<LinkAddress>();
+        @UnsupportedAppUsage
         private final List<RouteInfo> mRoutes = new ArrayList<RouteInfo>();
 
         public Builder() {
diff --git a/core/java/android/net/WebAddress.java b/core/java/android/net/WebAddress.java
index 24d4eb8..8026d76 100644
--- a/core/java/android/net/WebAddress.java
+++ b/core/java/android/net/WebAddress.java
@@ -19,6 +19,7 @@
 import static android.util.Patterns.GOOD_IRI_CHAR;
 
 import android.annotation.SystemApi;
+import android.annotation.UnsupportedAppUsage;
 
 import java.util.Locale;
 import java.util.regex.Matcher;
@@ -45,9 +46,13 @@
 @SystemApi
 public class WebAddress {
 
+    @UnsupportedAppUsage
     private String mScheme;
+    @UnsupportedAppUsage
     private String mHost;
+    @UnsupportedAppUsage
     private int mPort;
+    @UnsupportedAppUsage
     private String mPath;
     private String mAuthInfo;
 
@@ -147,16 +152,19 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public String getScheme() {
       return mScheme;
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public void setHost(String host) {
       mHost = host;
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public String getHost() {
       return mHost;
     }
@@ -167,16 +175,19 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public int getPort() {
       return mPort;
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public void setPath(String path) {
       mPath = path;
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public String getPath() {
       return mPath;
     }
@@ -187,6 +198,7 @@
     }
 
     /** {@hide} */
+    @UnsupportedAppUsage
     public String getAuthInfo() {
       return mAuthInfo;
     }
diff --git a/core/java/android/net/http/SslCertificate.java b/core/java/android/net/http/SslCertificate.java
index 21ada36..6fcd6eb 100644
--- a/core/java/android/net/http/SslCertificate.java
+++ b/core/java/android/net/http/SslCertificate.java
@@ -16,6 +16,7 @@
 
 package android.net.http;
 
+import android.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.Bundle;
 import android.text.format.DateFormat;
@@ -77,6 +78,7 @@
      * be available, and saveState and restoreState can be simplified
      * to be unconditional.
      */
+    @UnsupportedAppUsage
     private final X509Certificate mX509Certificate;
 
     /**
@@ -257,6 +259,7 @@
     /**
      * Convenience for UI presentation, not intended as public API.
      */
+    @UnsupportedAppUsage
     private static String getSerialNumber(X509Certificate x509Certificate) {
         if (x509Certificate == null) {
             return "";
@@ -271,6 +274,7 @@
     /**
      * Convenience for UI presentation, not intended as public API.
      */
+    @UnsupportedAppUsage
     private static String getDigest(X509Certificate x509Certificate, String algorithm) {
         if (x509Certificate == null) {
             return "";
@@ -454,6 +458,7 @@
      *
      * @hide Used by Browser and Settings
      */
+    @UnsupportedAppUsage
     public View inflateCertificateView(Context context) {
         LayoutInflater factory = LayoutInflater.from(context);
 
diff --git a/core/java/android/net/http/SslError.java b/core/java/android/net/http/SslError.java
index 1cd73d2..fad6689 100644
--- a/core/java/android/net/http/SslError.java
+++ b/core/java/android/net/http/SslError.java
@@ -16,6 +16,7 @@
 
 package android.net.http;
 
+import android.annotation.UnsupportedAppUsage;
 import java.security.cert.X509Certificate;
 
 /**
@@ -67,16 +68,19 @@
      * The SSL error set bitfield (each individual error is a bit index;
      * multiple individual errors can be OR-ed)
      */
+    @UnsupportedAppUsage
     int mErrors;
 
     /**
      * The SSL certificate associated with the error set
      */
+    @UnsupportedAppUsage
     final SslCertificate mCertificate;
 
     /**
      * The URL associated with the error set.
      */
+    @UnsupportedAppUsage
     final String mUrl;
 
     /**
diff --git a/core/java/android/net/metrics/ApfProgramEvent.java b/core/java/android/net/metrics/ApfProgramEvent.java
index ad4588f..5dabf35 100644
--- a/core/java/android/net/metrics/ApfProgramEvent.java
+++ b/core/java/android/net/metrics/ApfProgramEvent.java
@@ -17,6 +17,7 @@
 package android.net.metrics;
 
 import android.annotation.IntDef;
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
@@ -47,13 +48,20 @@
     @Retention(RetentionPolicy.SOURCE)
     public @interface Flags {}
 
+    @UnsupportedAppUsage
     public long lifetime;       // Maximum computed lifetime of the program in seconds
+    @UnsupportedAppUsage
     public long actualLifetime; // Effective program lifetime in seconds
+    @UnsupportedAppUsage
     public int filteredRas;     // Number of RAs filtered by the APF program
+    @UnsupportedAppUsage
     public int currentRas;      // Total number of current RAs at generation time
+    @UnsupportedAppUsage
     public int programLength;   // Length of the APF program in bytes
+    @UnsupportedAppUsage
     public int flags;           // Bitfield compound of FLAG_* constants
 
+    @UnsupportedAppUsage
     public ApfProgramEvent() {
     }
 
@@ -99,6 +107,7 @@
         }
     };
 
+    @UnsupportedAppUsage
     public static @Flags int flagsFor(boolean hasIPv4, boolean multicastFilterOn) {
         int bitfield = 0;
         if (hasIPv4) {
diff --git a/core/java/android/net/metrics/ApfStats.java b/core/java/android/net/metrics/ApfStats.java
index 76a781d..bb2a35c 100644
--- a/core/java/android/net/metrics/ApfStats.java
+++ b/core/java/android/net/metrics/ApfStats.java
@@ -16,6 +16,7 @@
 
 package android.net.metrics;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -26,26 +27,37 @@
 public final class ApfStats implements Parcelable {
 
     /** time interval in milliseconds these stastistics covers. */
+    @UnsupportedAppUsage
     public long durationMs;
     /** number of received RAs. */
+    @UnsupportedAppUsage
     public int receivedRas;
     /** number of received RAs matching a known RA. */
+    @UnsupportedAppUsage
     public int matchingRas;
     /** number of received RAs ignored due to the MAX_RAS limit. */
+    @UnsupportedAppUsage
     public int droppedRas;
     /** number of received RAs with a minimum lifetime of 0. */
+    @UnsupportedAppUsage
     public int zeroLifetimeRas;
     /** number of received RAs that could not be parsed. */
+    @UnsupportedAppUsage
     public int parseErrors;
     /** number of APF program updates from receiving RAs.. */
+    @UnsupportedAppUsage
     public int programUpdates;
     /** total number of APF program updates. */
+    @UnsupportedAppUsage
     public int programUpdatesAll;
     /** number of APF program updates from allowing multicast traffic. */
+    @UnsupportedAppUsage
     public int programUpdatesAllowingMulticast;
     /** maximum APF program size advertised by hardware. */
+    @UnsupportedAppUsage
     public int maxProgramSize;
 
+    @UnsupportedAppUsage
     public ApfStats() {
     }
 
diff --git a/core/java/android/net/metrics/DhcpClientEvent.java b/core/java/android/net/metrics/DhcpClientEvent.java
index c5b78a5..98a7d7e 100644
--- a/core/java/android/net/metrics/DhcpClientEvent.java
+++ b/core/java/android/net/metrics/DhcpClientEvent.java
@@ -16,6 +16,7 @@
 
 package android.net.metrics;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -34,6 +35,7 @@
     public final String msg;
     public final int durationMs;
 
+    @UnsupportedAppUsage
     public DhcpClientEvent(String msg, int durationMs) {
         this.msg = msg;
         this.durationMs = durationMs;
diff --git a/core/java/android/net/metrics/DhcpErrorEvent.java b/core/java/android/net/metrics/DhcpErrorEvent.java
index 8b77197..c6c06f0 100644
--- a/core/java/android/net/metrics/DhcpErrorEvent.java
+++ b/core/java/android/net/metrics/DhcpErrorEvent.java
@@ -16,6 +16,7 @@
 
 package android.net.metrics;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.SparseArray;
@@ -33,25 +34,41 @@
     public static final int DHCP_ERROR = 4;
     public static final int MISC_ERROR = 5;
 
+    @UnsupportedAppUsage
     public static final int L2_TOO_SHORT               = makeErrorCode(L2_ERROR, 1);
+    @UnsupportedAppUsage
     public static final int L2_WRONG_ETH_TYPE          = makeErrorCode(L2_ERROR, 2);
 
+    @UnsupportedAppUsage
     public static final int L3_TOO_SHORT               = makeErrorCode(L3_ERROR, 1);
+    @UnsupportedAppUsage
     public static final int L3_NOT_IPV4                = makeErrorCode(L3_ERROR, 2);
+    @UnsupportedAppUsage
     public static final int L3_INVALID_IP              = makeErrorCode(L3_ERROR, 3);
 
+    @UnsupportedAppUsage
     public static final int L4_NOT_UDP                 = makeErrorCode(L4_ERROR, 1);
+    @UnsupportedAppUsage
     public static final int L4_WRONG_PORT              = makeErrorCode(L4_ERROR, 2);
 
+    @UnsupportedAppUsage
     public static final int BOOTP_TOO_SHORT            = makeErrorCode(DHCP_ERROR, 1);
+    @UnsupportedAppUsage
     public static final int DHCP_BAD_MAGIC_COOKIE      = makeErrorCode(DHCP_ERROR, 2);
+    @UnsupportedAppUsage
     public static final int DHCP_INVALID_OPTION_LENGTH = makeErrorCode(DHCP_ERROR, 3);
+    @UnsupportedAppUsage
     public static final int DHCP_NO_MSG_TYPE           = makeErrorCode(DHCP_ERROR, 4);
+    @UnsupportedAppUsage
     public static final int DHCP_UNKNOWN_MSG_TYPE      = makeErrorCode(DHCP_ERROR, 5);
+    @UnsupportedAppUsage
     public static final int DHCP_NO_COOKIE             = makeErrorCode(DHCP_ERROR, 6);
 
+    @UnsupportedAppUsage
     public static final int BUFFER_UNDERFLOW           = makeErrorCode(MISC_ERROR, 1);
+    @UnsupportedAppUsage
     public static final int RECEIVE_ERROR              = makeErrorCode(MISC_ERROR, 2);
+    @UnsupportedAppUsage
     public static final int PARSING_ERROR              = makeErrorCode(MISC_ERROR, 3);
 
     // error code byte format (MSB to LSB):
@@ -61,6 +78,7 @@
     // byte 3: optional code
     public final int errorCode;
 
+    @UnsupportedAppUsage
     public DhcpErrorEvent(int errorCode) {
         this.errorCode = errorCode;
     }
@@ -90,6 +108,7 @@
         }
     };
 
+    @UnsupportedAppUsage
     public static int errorCodeWithOption(int errorCode, int option) {
         return (0xFFFF0000 & errorCode) | (0xFF & option);
     }
diff --git a/core/java/android/net/metrics/IpConnectivityLog.java b/core/java/android/net/metrics/IpConnectivityLog.java
index 4e57efa..998f4ba 100644
--- a/core/java/android/net/metrics/IpConnectivityLog.java
+++ b/core/java/android/net/metrics/IpConnectivityLog.java
@@ -16,6 +16,7 @@
 
 package android.net.metrics;
 
+import android.annotation.UnsupportedAppUsage;
 import android.net.ConnectivityMetricsEvent;
 import android.net.IIpConnectivityMetrics;
 import android.os.Parcelable;
@@ -37,6 +38,7 @@
 
     private IIpConnectivityMetrics mService;
 
+    @UnsupportedAppUsage
     public IpConnectivityLog() {
     }
 
@@ -104,6 +106,7 @@
      * @param data is a Parcelable instance representing the event.
      * @return true if the event was successfully logged.
      */
+    @UnsupportedAppUsage
     public boolean log(String ifname, Parcelable data) {
         ConnectivityMetricsEvent ev = makeEv(data);
         ev.ifname = ifname;
@@ -130,6 +133,7 @@
      * @param data is a Parcelable instance representing the event.
      * @return true if the event was successfully logged.
      */
+    @UnsupportedAppUsage
     public boolean log(Parcelable data) {
         return log(makeEv(data));
     }
diff --git a/core/java/android/net/metrics/IpManagerEvent.java b/core/java/android/net/metrics/IpManagerEvent.java
index f8a63ce..c47650f 100644
--- a/core/java/android/net/metrics/IpManagerEvent.java
+++ b/core/java/android/net/metrics/IpManagerEvent.java
@@ -17,6 +17,7 @@
 package android.net.metrics;
 
 import android.annotation.IntDef;
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.SparseArray;
@@ -53,6 +54,7 @@
     public final @EventType int eventType;
     public final long durationMs;
 
+    @UnsupportedAppUsage
     public IpManagerEvent(@EventType int eventType, long duration) {
         this.eventType = eventType;
         this.durationMs = duration;
diff --git a/core/java/android/net/metrics/IpReachabilityEvent.java b/core/java/android/net/metrics/IpReachabilityEvent.java
index 019c2c5..715c95e 100644
--- a/core/java/android/net/metrics/IpReachabilityEvent.java
+++ b/core/java/android/net/metrics/IpReachabilityEvent.java
@@ -16,6 +16,7 @@
 
 package android.net.metrics;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.SparseArray;
@@ -48,6 +49,7 @@
     // byte 3: when byte 2 == PROBE, errno code from RTNetlink or IpReachabilityMonitor.
     public final int eventType;
 
+    @UnsupportedAppUsage
     public IpReachabilityEvent(int eventType) {
         this.eventType = eventType;
     }
@@ -80,6 +82,7 @@
     /**
      * Returns the NUD failure event type code corresponding to the given conditions.
      */
+    @UnsupportedAppUsage
     public static int nudFailureEventType(boolean isFromProbe, boolean isProvisioningLost) {
         if (isFromProbe) {
             return isProvisioningLost ? PROVISIONING_LOST : NUD_FAILED;
diff --git a/core/java/android/net/metrics/RaEvent.java b/core/java/android/net/metrics/RaEvent.java
index 3249f80..c41881c 100644
--- a/core/java/android/net/metrics/RaEvent.java
+++ b/core/java/android/net/metrics/RaEvent.java
@@ -16,6 +16,7 @@
 
 package android.net.metrics;
 
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -101,39 +102,47 @@
         long rdnssLifetime           = NO_LIFETIME;
         long dnsslLifetime           = NO_LIFETIME;
 
+        @UnsupportedAppUsage
         public Builder() {
         }
 
+        @UnsupportedAppUsage
         public RaEvent build() {
             return new RaEvent(routerLifetime, prefixValidLifetime, prefixPreferredLifetime,
                     routeInfoLifetime, rdnssLifetime, dnsslLifetime);
         }
 
+        @UnsupportedAppUsage
         public Builder updateRouterLifetime(long lifetime) {
             routerLifetime = updateLifetime(routerLifetime, lifetime);
             return this;
         }
 
+        @UnsupportedAppUsage
         public Builder updatePrefixValidLifetime(long lifetime) {
             prefixValidLifetime = updateLifetime(prefixValidLifetime, lifetime);
             return this;
         }
 
+        @UnsupportedAppUsage
         public Builder updatePrefixPreferredLifetime(long lifetime) {
             prefixPreferredLifetime = updateLifetime(prefixPreferredLifetime, lifetime);
             return this;
         }
 
+        @UnsupportedAppUsage
         public Builder updateRouteInfoLifetime(long lifetime) {
             routeInfoLifetime = updateLifetime(routeInfoLifetime, lifetime);
             return this;
         }
 
+        @UnsupportedAppUsage
         public Builder updateRdnssLifetime(long lifetime) {
             rdnssLifetime = updateLifetime(rdnssLifetime, lifetime);
             return this;
         }
 
+        @UnsupportedAppUsage
         public Builder updateDnsslLifetime(long lifetime) {
             dnsslLifetime = updateLifetime(dnsslLifetime, lifetime);
             return this;
diff --git a/core/java/android/net/nsd/NsdServiceInfo.java b/core/java/android/net/nsd/NsdServiceInfo.java
index bccaf60..9ba17ed 100644
--- a/core/java/android/net/nsd/NsdServiceInfo.java
+++ b/core/java/android/net/nsd/NsdServiceInfo.java
@@ -17,6 +17,7 @@
 package android.net.nsd;
 
 import android.annotation.NonNull;
+import android.annotation.UnsupportedAppUsage;
 import android.os.Parcelable;
 import android.os.Parcel;
 import android.text.TextUtils;
@@ -185,6 +186,7 @@
     }
 
     /** @hide */
+    @UnsupportedAppUsage
     public void setAttribute(String key, byte[] value) {
         if (TextUtils.isEmpty(key)) {
             throw new IllegalArgumentException("Key cannot be empty");